Cisco PA-A2, PA-A2-4T1C-OC3SM=, PA-A2-4T1C-T3ATM=, PA-A2-4E1XC-OC3SM=, PA-A2-4E1XC-E3ATM= Installation And Configuration Manual

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PA-A2 ATM CES Port Adapter Installation
and Configuration

Product Numbers: PA-A2-4T1C-OC3SM(=), PA-A2-4T1C-T3ATM(=),
PA-A2-4E1XC-OC3SM(=), PA-A2-4E1XC-E3ATM(=)
Platforms Supported: Cisco 7200 Series, Cisco uBR7246

Text Part Number: OL-3460-01

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PA-A2 ATM CES Port Adapter Installation and Configuration

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CONTENTS

Preface: PA-A2 ATM CES Port Adapter Installation and Configuration vii

Objectives vii
Organization viii
Related Documentation viii
Obtaining Documentation ix

World Wide Web ix
Document ation C D-R OM ix
Ordering Documentation x
Document ation Fe edb ack x

Obtaining Technical Assistance x

Cisco.com x
Technical Assistance Center xi

Cisco TAC Web Site xi
Cisco TAC Escalation Center xii

CHAPTER

1 Overview: PA-A2 ATM CES Port Adapter 1-1

Circuit Emulation Services Overview 1-1

Circuit Emulation Services Internetworking Function 1-2

T1/E1 Unstructured (Clear Channel) CES Services 1-2
T1/E1 Structured (N x 64) CES Services 1-4
Channel-Associated Signaling (for Structured CES Services Only) 1-6

Network Timing Services for CES Operations 1-8

Network Clock Synchronization 1-8
Designating a PRS Source Port in a Cisco 7200 Series Router or Cisco uBR7200 series 1-8
Network Clock Distribution in a Cisco 7200 Series Router or a Cisco uBR7200 series 1-9

Clocking Modes for CES Operations 1-11

Synchronous Clocking Mode 1-11
Synchronous Residual Time Stamp Clocking Mode 1-12
Adaptive Clocking Mode 1-12
Summary of Clocking Modes 1-13

Other Network Factors Relevant to CES Operations 1-13

PA-A2 ATM CES Port Adapter Overview 1-15

Features 1-16

LEDs 1-17

Contents

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PA-A2 ATM CES Cables, Connectors, and Pinouts 1-18

ATM Port Cables 1-18

CBR Port Cables 1-19
ATM Management Information Base Specifications 1-20
Fibre-Optic Transmission Specifications 1-20

Maximum Transmission Distances for SONET 1-20

Power Budget 1-21

Approximating the ATM CES Port Adapter Power Margin 1-21
Using Statistics to Estimate the Power Budget 1-23

For Further Reference 1-23
Setting ATM CES Port Adapter Jumpers 1-23
PA-A2 ATM CES Port Adapter Slot Location s on the Supported Platforms 1-24

Cisco 7200 Series Routers and Cisco uBR7200 Series Routers Slot Numbering 1-25

Identifying Interface Addresses 1-27

Interface Addresses of Cisco 7200 Series Rout ers and Cisco uBR7200 Series Routers 1-27

CHAPTER

2 Preparing to Install the PA-A2 ATM CES PortAdapter 2-1

Required Tools and Equipment 2-1
Minimum Software and Hardware Requirements 2-1
Checking Hardware and Software Compatibility 2-2
Safety Guidelines 2-2

Safety Warnings 2-2
Electrical Equipment Guidelines 2-4
Telephone Wiring Guidelines 2-4

Preventing Electrostatic Discharge Damage 2-5
Laser/LED Safety 2-5
FCC Class A Compliance 2-6
BABT Compliance 2-7
CE Compliance 2-7

CHAPTER

3 Removing and Installing the PA-A2 ATM CES Port Adatper 3-1

Handling Port Adapters 3-1
Online Insertion and Removal 3-2
Warnings and Cautions 3-3
Port Adapter Slot Divider 3-3

Cisco 7200 Series Routers—Removing the Slot Divider 3-4

Cisco uBR7200 Series Routers—Removing the Slot Divider 3-5

Contents

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Port Adapter Removal and Installation 3-6

Cisco7200 Series Routers and Cisco7200 VXR Routers—Removing and Installing a Module 3-7
Cisco uBR7200 Series Routers—Removing a Module 3-8
Cisco uBR7200 Series Routers—Installing a Module 3-9

CHAPTER

4 Configuring the PA-A2 ATM CES Port Adapter 4-1

Using the EXEC Command Interpreter 4-1
PA-A2 ATM CES Configurations 4-2

Shutting Down an Interface 4-3
Performing a Basic Interface Configuration 4-4
Configuring the PA-A2 ATM CES Port Adapter for T3 4-5
Configuring the PA-A2 ATM CES Port Adapter for E3 4-5
Configuring the PA-A2 ATM CES Port Adapter for OC-3 4-6
Configuring VCs 4-6
Configuring PV Cs 4-7

Configuring a PVC on a Point-to-Point Subinterface 4-7
Configuring a PVC on a Multipoint Subinterface 4-8

Configuring SVC s 4-9

Configuring the PVC That Performs SVC Call Setup 4-10

Configuring the Network Service Access Point Address 4-11
Configuring Classical IP and ARP over ATM 4-13
Classes of Service and Transmit Priority on the PA-A2 ATM CES Port Adapter 4-13

Customizing the PA-A2 ATM CES Port Adapter 4-14

Setting the MTU Size 4-15
Configuring an ATM Interface for Local Loopback 4-15
Configuring an ATM Interface for External Loopback 4-15

Checking the Configuration 4-15

Using show Commands to Verify the New Interface Status 4-16

Using the show version or show hardware Commands 4-16

Using the show diag Command 4-17

Using the show interfaces Command 4-17
Using the ping Command to Verify Network Connectivity 4-18
Using loopback Commands 4-19

Traffic Management 4-20
Troubleshooting the PA-A2 ATM CES Port Adapter Installation and Configuration 4-21

PA-A2 ATM CES Port Adapter Statistics 4-21
Using the debug atm Commands 4-22
Displaying ATM Information 4-23

ATM Configuration 4-24

Contents

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Upgrading Your Boot Flash Image 4-25
Port Adapter Error Messages 4-26

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Preface: PA-A2 ATM CES Port Adapter
Installation and Configuration

This prefa ce de s cr ibe s t he o bj ect ives an d organ ization o f th is d o cu ment and ex plains how to fi nd
additional information on related products and services. This preface contains the following sections:

• Objectives, page vii

• Organiz at ion, pa ge v iii

• Related Documentation, pageviii

• Obtaining Documentation, page ix

• Obtaini ng Technical A ssistance, p ag e x

Objectives

This document describes how to install and configure the dual-wide ATM circuit emulation services
(CES) port adapter, hereafter referred to as the PA-A2 ATM CES, which is used in the following
platforms :

• Cisco 7200 series routers, including the 2-slot Cisco 7202, 4-slot Cisco 7204

and Cisco 7204VXR, and the 6-slot Cisco 7206 and Cisco 7206VXR

• 6-slot Cisco uBR7246

For complete descriptions of interface subcommands and the configuration options that support ATM
CES por t adapter f u nc tio n ality, refer to p ub li cat ions lis ted i n th e “Related Documentation” section on

page v iii.

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Preface: PA-A2 ATM CES Port Adapter Installation and Configuration

Organization

Organization

This docu m en t co nt ain s t he f ollow in g ch ap ter s:

Related Documentat ion

The documentation listed below is ava ilable online, on the Documentation CD-ROM, or as printed
docum ents.

Your router, switch, or gateway and the Cisc o IOS software running on it con tain extensive featur es and
functionality, which are documented in the following resources:

• Cisco IOS software:

–

For configuration information and support, refer to the modular configuration and modular
command reference publications in the Cisco IOS software configuration documentation set
that corresponds to the software release installed on your Cisco hardware.

–

T o ch eck the m inimum so ftware require ment s of Cisco I OS sof tware wi th the hardwa re ins talled
on your router, Cisco maintains the Software Advisor tool on Cisco.com:
http:/ /w w w.cisco.c om/cgi- b in /S u p po r t/C o m p Nav /I nd ex.pl. You must be a r egi s te red use r o n
Cisco.co m to access thi s t oo l.

Note You can access Cisco IOS s o ftwa re co nfi gu ration and h ar d ware insta lla ti on

and maintenance documentation on the World Wide Web at

http://w w w.cisco.c om/publi c/ cou n tr ie s _l an gu ag es.shtml .

• Cisco 7200 series routers:

–

For port ad apte r hardw ar e and memo ry conf i gu rati on gui del ines , refer to the Cisco 7200 Series
Port Adapter Hardware Configuration Guidelines.

–

For hardware installation and maintenance information (including the Cisco 7206 or
Cisco 7 20 6 V XR a s a router s h el f in a C isc o A S 58 0 0 Un iversa l A ccess S erver ), r ef er to the
installation and configuration guide that shipped with your Cisco 7200 series router.

–

For information on network processing engines or network services engines, refer to the

Network Processing Engine and Network Services Engine Installation and Configuration

publication.

Section Title Description

Chapter 1 Overview: <XXXXX Module> Describes the module and its LED displays,

cables, and re cepta cles.

Chapter 2 Preparing to Install the <XXXXX

Module>

Describes safety considerations, tools required,
and procedures you should perform before the
actual in stallati on .

Chapter 3 Removing and Installing the

<XXXXX Module>

Describes the procedures for installing and
removing module.

Chapter 4 Configuring the PA-A2 ATM CES

Port Adapter

Provides instructions for configuring the module.

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Preface: PA-A2 ATM CES Port Adapter Installation and Configuration

Obtaining Documentation

–

For info rmation on the router boot images, refe r to the Cisco 7200 Series Routers Boot Im ages
Information publication.

• Cisco 7200 VX R routers:

• For hard w are inst all at io n and main te na nc e inf orm at ion , re fe r to the Cisco 7200 VXR Installation

and C on figuratio n Guide or t h e Cisco 7200 VXR Quick Start Guide.

• Cisco uBR7200 series routers:

• For insta llation and ma in ten ance in f orm a tion, ref er t o t he Cisco uBR7200 Series Hardware

Instal la tion Gu ide.

• For inte rnat ional age ncy co m p li an ce, safety, and statutory inform ati on f o r WAN interfaces:

–

Regulatory Compliance and Safety Information for the Cisco 7200 Series Routers

–

“Regulatory Compliance and Safety Information” appendix in the Cisco uBR7200 Series
Universal Broadband Router Hardware Installation Guide

–

Site Prep ar at ion and Saf ety Guid e

• To view Cisco documentation or obtain general information about the documentation, refer to the

followi ng sec t ions:

–

Obtaining Documentation, page ix

–

Obtaini ng Technical A ssistance, p ag e x

–

Customer service at 800 553-6387 or 408 526-7208. Customer service hours are 5:00 a.m. to
6:00 p.m. Pacific time, Monday through Friday (excluding Cisco-observed holidays). You can
also send e-mail to c s -rep @ cisco.c om.

Obtaining Document ation

The following sections explain how to obtain documentation from Cisco Systems.

World Wide Web

You can acces s th e most cur re nt C isco d o cu m en ta tio n o n t h e World Wide Web at the f o ll owin g URL:

http:/ /w w w.cisco.com

Translated do cu mentation i s availa ble at the fol lowin g U R L:

http://w w w.cisco.c om/publi c/ cou n tr ie s _l an gu ag es.shtml

Documentat i on CD-ROM

Cisco docum en tatio n and addi tional li terat ure ar e available in a Cisco Do cume ntati on CD- ROM
package , which is shipp ed wit h your pr oduct. The Doc umentat ion CD -ROM i s updat ed mont hly and may
be more cu r r en t t ha n p r in te d do cu m en ta ti on . T he CD - ROM p ack ag e is available as a single u n it or
through an annual subscription.

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Preface: PA-A2 ATM CES Port Adapter Installation and Configuration

Obtaining Technical Assistance

Ordering Docum entation

Cisco documentation is available in the following ways:

• Registered Cisco Direct Customers can order Cisco product documentation from the Networking

Products M a rk etP l ace :

http:/ /w w w.cisco.com/cg i- bin/or de r/order_r oot.pl

• Regis tere d Cis co. com use rs c an o rde r the Doc ument at ion CD-ROM t hro ugh t he onli ne Su bsc ri ption

Store:

http://www.cisco.com/go/subscription

• Nonregist er ed C isco.com us er s can orde r do cu m e nt ati on t hr o ugh a local ac co unt r epresent ative by

calling Cisco corporate headquarters (California, USA) at 408 526-7208 or, elsewhere in North
America, by calling 800 553-NETS (6387).

Documentati on Feedback

If you are reading Cisco product documentation on Cisco.com, you can submit technical comments
electronically. Click Leave Feedback at the bottom of the Cisco Documentation home page. After you
complete the form, print it out and fax it to Cisco at 408 527-0730.

You can e-mail your c o m ments to bug-d oc@ci s co . co m .
To submit your comments by mail, use the response card behind the front cover of your document, or

write to th e fo ll owi ng a dd r es s:
Cisco Systems

Attn: D oc ument R es o ur c e Connect io n
170 West Tasman Drive
San Jose, CA 95134-9883

We appreciate your comments.

Obtaining Technical Assistance

Cisco p rovi des Cisco.com a s a star t in g po in t fo r al l t ech n ica l assistan ce. Customers and p ar t ne rs can
obtain documentation, troubleshooting tips, and sample configurations from online tools by using the
Cisco T e c hnical Assistance Center (TAC) Web Site. Cisco.com registered users have c omplete ac cess to
the technical support resources on the Cisco TAC Web Site.

Cisco.com

Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open
access to Ci s co in fo rm at io n, networking solutions, services, programs, and resources at any time, from
anywhere in the world.

Cisco.com is a highly integrated Internet application and a powerful, easy-to-use tool that provides a
broad range of features and services to help you to

• Strea m li ne business p ro cesses and i m p rove pr oduct ivit y

• Resolve technical issues with online support

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Preface: PA-A2 ATM CES Port Adapter Installation and Configuration

Obtaining Technical Assistance

• Download and test software packages

• Order Cisco learning materials and merchandise

• Register for online skill assessment, training, and certification programs

You can self-register on Cisco.com to obtain customized information and service. To access Cisco.com,
go to the follow in g U RL:

http:/ /w w w.cisco.com

Technical Assi stance Cen t er

The Cisc o TAC is availab le to a ll customer s wh o need tech ni cal ass i stance wit h a C isco produ ct ,
technology, or solution. Two types of support are available through the Cisco TAC: the Cisco TAC
Web Sit e a nd th e Cisco TAC Escalatio n Cen t er.

Inquiries to Cisco TAC are categorized according to the urgency of the issue:

• Priori ty level 4 (P4) —You need information or assistance concerning Cisco product capabilities,

product installation, or basic product configuration.

• Priori ty level 3 (P3) —Your network performance is degraded. Network functionality is noticeably

impaired, but most business operations continue.

• Priori ty level 2 (P2) —Your production network is severely degraded, affecting significant aspects

of business operations. No workaround is available.

• Priority level 1 (P1)—Your production n et w ork is d o wn, a nd a c rit ica l impa ct to bus i nes s op erat io ns

will occur if service is not restored quickly. No workaround is available.

Which Cisco TAC resource you choose is based on the priority of the problem and the conditions of
service co nt r act s , wh en ap p licable.

Cisco TAC Web Site

The Cisc o TAC Web Site allow s you to re sol v e P3 and P 4 is sue s y our sel f, saving both cost and time. The
site provides around-the-clock access to online tools, knowledge bases, and software. To access the
Cisco TAC Web Site , g o to the foll owi ng U R L:

http:/ /w w w.cisco.com/tac

All custom e rs, par tn er s, an d resellers wh o have a valid Ci s co serv i ces co nt ract have complete access to
the technical support resources on the Cisco TAC Web Site. The Cisco TAC Web Site requires a
Cisco.com login ID and password. If you have a valid service contract but do not have a login ID or
passwo r d, go to the following URL to r e gi s te r:

http:/ /w w w.cisco.com/r egis t e r /

If you cannot resolve your technical issues by using the Cisco TAC Web Site, and you are a Cisco.com
registered user, you can open a case online by using the TAC Case Open tool at the following URL:

http:/ /w w w.cisco.com/tac/caseo pen

If you have Internet access, it is recommended that you open P3 and P4 cases through the Cisco TAC
Web Si te.

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Preface: PA-A2 ATM CES Port Adapter Installation and Configuration

Obtaining Technical Assistance

Cisco TAC Escalation Center

The Cisc o TAC Escala tion Cen ter addresses iss u es t h at are class i fied as priorit y level 1 o r pri or it y
level 2; thes e cl as sifi cat io ns ar e a s sig ne d wh en sever e n et wo r k degr ad at io n s ignificantly i m p act s
busin ess ope ra tion s. Whe n you co ntac t t he TAC Escal at ion Ce nter wi th a P1 or P2 p rob le m, a Ci sco TAC
engineer w il l a ut om ati cally op en a case.

To obtain a directory of toll-free Cisco TAC telephone numbers for your country, go to the following
URL:

http:/ /w w w.cisco .com/wa rp /public/687/D irect or y /D irTAC.shtml

Before c all ing , pl eas e ch eck wit h your ne tw ork oper at ions center to dete rmi ne th e l e v el of Ci sco supp ort
services to which your company is entitled; for example, SMARTnet, SMARTnet Onsite, or Network
Supported Accounts (NSA). In addition, please have available your service agreement number and your
product serial number.

CHAPTER

1-1

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OL-3460-01

1

Overview: PA-A2 ATM CES Port Adapter

This chapter describes the PA-A2 ATM CES port adapter and contains the following sections:

• Circui t Emul at ion Service s O ver view, page 1 -1

• PA-A2 ATM CES Port Adapter Overview, page 1-15

• LEDs, page 1 -17

• PA-A2 ATM CES Cables, Connectors, and Pinouts, page 1-18

• ATM Ma na gemen t I n fo rmation Ba se S p ecificat i on s , page 1- 20

• Fibre-Optic Transmission Specifications, page 1-20

• Setting ATM CES Port Adapter Jumpers, page 1-23

• PA-A2 ATM CES Port Adapter Slot Locations on the Supported Platforms, page 1-24

• Identifying Interface Addresses, page 1-27

Circuit Emulation Services Overview

Voice and video services—circuit emulation services (CES)—allow yo u to interco n nect existin g T1/E1
interfaces and other types of constant bit rate (CBR) equipment. CBR services include such features as
PBX interconnect, consolidated voice and data traffic, and video conferencing.

Wit h circu it emula tion , data recei ved from an e xtern al de vice at the edge of an A T M netwo rk is co n verte d
to ATM cells, sent through the network, reassembled into a bit stream, and passed out of the ATM
network to its destination. T1/E1 circuit emulation does not interpret the contents of the data stream. All
the bit s fl o wi ng int o t he i np ut edge por t of the ATM networ k ar e re pr oduce d at on e cor re spon di ng out put
edge port.

An emulated circuit is carried across the ATM network on a PVC, which is configured through the
network management system.

The ATM CES port ad ap ter o ffe rs tw o t y pe s of services, th at are covered in the follow in g sect io ns :

• Circuit Emulation Services Internetworking Function, page 1-2

• Network Timing Services for CES Operations, page 1-8

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Chapter1 Overview: PA-A2 ATM CES Port Adapter

Circuit Emulation Services Overview

Circuit Emulation Services Internetworking Function

CES-IWF i s a service ba s ed o n ATM Forum sta nd ard s th at al low s co m mu n ications b et w een C BR and
ATM UNI interfa ces, that is, bet ween non-ATM telephony de vices (such as classic PBXs or TDMs) and
ATM devices (such as Cisco 7200 series routers). Thus, a Cisco 7200 series router equipped with an
ATM CES port adapter offers a migration path from classic T1/E1 CBR data communications services
to emulated CES T1/E1 unstructured (clear channel) services or structured (N x 64) services in an A TM
network. A Cisco uBR7200 series equipped with an ATM CES port adapter offers an ATM WAN
connection between the broadband cable network and the Internet.

Figure 1-1 is a simplified representation of CES-IWF functions in an ATM network.

Figure 1-1 Typical CES-IWF Operations in an ATM Network

The circuit emulation services offered by the ATM CES port adapter are discussed in the following
sections :

• T1/E1 Unstructured (Clear Channel) CES Services, page 1-2

• T1/E1 Structured (N x 64) CES Services, page 1-4

• Channel-Associated Signaling (for Structured CES Services Only), page 1-6

T1/E1 Unstructured (Clear Channel) CES Services

Unstructured CES services in an ATM network emulate point-to-point connections over T1/E1 leased
lines. This s ervi ce maps t he en ti re b an dw i dt h necessary for a T1 /E1 leas ed li ne co nn ec ti on ac r oss t h e
ATM network, allowing users to interconnect PBXs, TDMs, and video conferencing equipment.
Unstructured CES operations do not decode or alter the CBR data in any way.

The ATM CES port adapter supports DSX-1 physical interfaces, providing T1/E1 unstructured (clear
channel) CBR data transmission services to Cisco 7200 series and Cisco uBR7200 series users at a rate
of 1.544 Mbps for T1 and 2.048 Mbps for E1.

The use of an ATM CES port ad ap ter f o r un str u ct ured C E S s e rvices simu lat es a p oi nt -to -po in t T1/E1
leased line across your ATM network.

ATM PBX

PBX

PBX

OC-3/T3/.E3

OC-3/T3/E3

T1/E1

T1/E1

ATM UNI

PVC

ATM UNI
PVC

ATM DSU

S5971

CES-IWF

(CBR to ATM UNI)

CES-IWF

(CBR to ATM UNI)

Router

Router

ATM

network

PBX

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Circuit Emulati on Ser v ices Overview

Figure 1-2 is a generalized representation of how T1/E1 unstructured CES services are set up in

conjunction with a Cisco 7200 series router equipped with an ATM CES port adapter.

Figure 1-2 T1/E1 Unstructured CES Services Across Leased Lines

Figure 1-3 is a general example of unstructured CES applications in an ATM network. In unstructured

CES services, user CBR data received from an edge device at one side of the network is segmented into
ATM cells and propagated through the ATM network. After traversing the network, the ATM cells are
reass embled into a CBR bit s tream that ma tches the orig inal us er data. This CBR dat a is th en passed out
of the network to the edge device at the destination endpoint.

PBX

PBX

T1/E1 OC3/T3/E3 OC3/T3/E3

ATM-CES PA

T1/E1

ATM trunk

Unstructured

CES connection

Unstructured

CES connection

Bandwidth reserved

across trunk connection

for unstructured

CBR traffic

S5886

Router

ATM-CES PA

Router

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Circuit Emulation Services Overview

Figure 1-3 T1/E1 CES Application s in ATM Network

T1/E1 Structu red (N x 6 4) CES Services

The T1/E1 structured (N x 64) CES services enable a CES module to function like a classic digital access
and crossc on n ect s y stem (DACS) switch.

The ATM CES port adapter supports DSX-1 physical interfaces, providing T1/E1 channelized data
transmission services at a rate of 1.544 Mbps for T1 and 2.048 Mbps for E1.

Using an ATM CES por t a da pt er, you can map a si ng l e D S 0 ch an ne l o r mu ltiple D S 0 ch an ne ls across
an ATM network. Each T1 port has up to 24 time slots, and each E1 port has up to 31 time slots for
allocation to structured CES circuits. Each time slot can transmit CBR data at a rate of 64 kbps, or at 56
kbps, if you choose to use optional channel associated signaling (CAS). The “Channel-A ss o cia ted

Signaling (for Structured CES Services Only)” section on page 1-6, describes the CAS mechanism.
Figure 1-4 il lu str at es t he d ig it al cr oss c on n ect an d ch an ne li zed m a pp in g f un ct io ns offer ed by a

Cisco 7200 series ro uter or a Cisco uBR7200 ser ies equippe d with an ATM CES port adapte r. Single or
multiple DS0 time slots can be mapped across the ATM network. Each time slot (or DS0 channel)
represent s a single N x 64 circuit that can t ra ns m it CBR data at a r at e o f 64 k b ps.

Multiple N x 64 circuits can be connected to a single port, if separate time slots are used.
With T1/E1 structured CES services, network designers can simplify networks by eliminating TDM

devices, usin g ATM CES p o rt a d a p te rs inste a d as a mea ns of a llo cating T1/E1 bandwidth t o P BX s and
teleconferencing equipment.

T1/E1

OC3/T3/E3

ATM-CES PA

ATM-CES PA

PBX

OC3/T3/E3

T1/E1

Video conferencing

ATM

network

MUX

T1/E1

T1/E1

MUX

OC3/T3/E3T1/E1

OC3/T3/E3

OC3/T3/E3

OC3/T3/E3

ATM-CES PA

ATM-CES PA

ATM-CES
PA

ATM-CES PA

T1/E1

= CBR bit stream

CODEC

= ATM cells

PBX

PBX

Router

Router

Router

Router

Router

Router

Video conferencing

S5887

CODEC

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Circuit Emulati on Ser v ices Overview

Figure 1-4 Digital Acc ess and Crossconnect (DACS) Functions of CES Modules

As Figure 1-4 demonstr at es , st r uc tu re d ser vi ces in an ATM CES por t ad ap ter a llow T1 /E 1- f orm a tt ed
CBR data to be provisioned into individual DS0 channels (PVCs) or groups of DS0 channels.

Data fro m th es e channels ca n be sent to m u lt ip le individu al outpu t po r ts o n a CE S modu le , w h er e t he
data can be combined with CBR data from other DS0 channels or groups of DS0 channels to form an
outgoing T1/E1 bit stream. Thus, you can combine structured CBR data with great flexibility for
transpor t acr o ss an ATM network .

Figure 1-5 g ives on e exa mple o f how 2 4 available N x 64 time sl ots for T 1 ( 31 tim e slots f or E1 no t

shown) in an ATM CES por t ad ap ter c an be combin ed to accomp lish structured CB R d ata transp or t in
an ATM network. The DS0 channels can be grouped as either contiguous or noncontiguous time slots.

The ingress (source) DS0 channels can be mapped into different DS0 channels on egress from the ATM
network at the destinat io n no de.

(1 x 64)

(1 x 64)

(1 x 64)
(1 x 64)

(12 x 64)

(12 x 64)

(12 x 64)

(12 x 64)

T1/E1

T1/E1

T1/E1

T1/E1

T1/E1

OC3/T3/E3

OC3/T3/E3

Router

Router Router

ATM network

S5888

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Figure 1-5 Time Slots for Structured Services in PA-A2 ATM CES Port Adapters

For CES structured services, each DS0 time slot represents a data bandwidth of 64 kbps for CBR data
transpor t. I f o p ti ona l ch an ne l a s so ciated sign al in g (C A S ) is b ei ng used, how ever, a data b an d w id th o f
56 kbps per DS0 time slot is available for CBR data transport.

Figure 1-5 shows one end of three PVCs that have been provisioned for structured CBR data transport.

Think of t he s e D S0 ch an n els as t he so ur ce en ds of t he P V Cs . Th e destinat io n en ds of the P V Cs each
require the allocation of an identical number of DS0 time slots.

However, the actual DS0 numbers assigned at the destina tion node can differ from those assigne d at the
source node. In other words, the DS 0 numbers at e ac h end of the PVC need not corre spond one for one.
Only th e a ctu al n umbers of ti m e s lots p r ovis io n ed at each end of t he PVC mu s t a gre e .

For example, the circuit identified as PVC No. 3 in Figure 1-5 requires a similar bundling of three time
slots at the destination end of the PVC (representing a data bandwidth of 192 kbps) in order for the
circuit t o oper at e p r op er ly.

Channe l -Associat ed Signa l i ng (for Structure d CES Serv i ces Only )

Because th e ATM CES por t ad ap ter e m u lat es constant b it rate se rvi ces over ATM ne tw ork s , i t mu s t be
capable of providing support for handling channel-associated signaling (CAS) information introduced
into structured CES circuits by PBXs and time-division multiplexing (TDM) devices. An optional CAS
feature fo r th e ATM CES por t ad ap te r meets this requi re men t.

With respect to t he C AS inform at io n car ried in a C B R b it stream, an ATM CES por t a da pt er can be
configured to o p er ate as foll ows:

DS0 No. 4 DS0 No. 5

DS0 No. 6

. . .

. . .

Circuit No. 1

Circuit No. 2

Circuit No. 3

CBR
PVC No. 3

CBR
PVC No. 2

CBR
PVC No. 1

Total bandwidth of T1 port (1.544 Mbps)
Total bandwidth of E1 port (2.048 Mbps)

S5889

N x 64

Slot 1

N x 64

Slot 2

N x 64

Slot 3

N x 64

Slot 4

N x 64

Slot 5

N x 64

Slot 6

N x 64

Slot 7

N x 64

Slot 8

N x 64

Slot 24

64 kbps

128 kbps

192 kbps

1 time slot

allocated

2 contiguous time

slots allocated

3 contiguous time

slots unallocated

3 non-contiguous time

slots allocated

24 64-kbps time slots available per ATM-CES port adapter

DS0 No. 7 DS0 No. 8 DS0 No. 24DS0 No. 2 DS0 No. 3DS0 No. 1

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• Without the optional CAS feature enabled (the default state).

In this ca se , th e ATM CES port adapter d oes not sense the CAS inf o rm ati on ( ca rr ie d as s o -called
“ABCD” bits in the CBR bit stream) and provides no support for CAS functions.

• With the op ti on al CAS fe at ur e enabled , bu t w i th ou t the op ti on al (Cisco-propr ietary) “on-hook

detection” fe atur e enabled .
In this ca se , in ad di tion t o pa ckag in g inco ming CBR data i nto ATM AAL1 cells i n the us ual mann er

for transport through the network, the ATM CES port adapter in the ingress node s enses the ABCD
bit patterns in the incoming data, incorporates these patterns in the ATM cell stream, and propagates
the cells to the next node in the network. The ATM cells are transported across the network from
link t o l ink until th e egress n od e i s r eached.

At the egress node, the ATM CES port adapter strips off the ABCD bit patterns carried by the ATM
cells, re assembles t he C A S A BC D b it s an d th e u ser ’s CBR da ta into t he origina l form , and p asses
the frames out of the ATM network in the proper DS0 time slot.

All thes e pr o cess e s occur tran s p ar en tl y w i th ou t user inte rve nt io n.

• With both the optional CAS and on-hook detection features enabled.

In this case, the CAS and on-hook detection features work together to enable an ingress node in an
ATM network to monitor on-hook and off-hook conditions for a specified 1 x 64 structured CES
circuit. As implied by the notation “1 x 64,” the on-hook detection (or bandwidth-release) fe ature is
support ed on ly i n a st ru ct ur ed C ES cir cu it th at involve s a s in gl e D S0 ti m e s lo t a t e ach end of the
connecti on .

The DS0 time slot configured for the structured CES circuit at the ingress node (time slot 2) can be
diff erent from the DS0 time slot configured at the egress node (time slot 4). Only one such time s lot
can be co nfigu re d at each en d o f th e cir cu it w h en th e on -ho o k d et ect io n f eat ur e is u s ed .

When you invoke this feature, the ingress ATM CES port adapter monitors the ABCD bits in the
incomi ng CBR bit stream to detect on-hook and off-hook con ditions in the c ircuit. In an “off-hook”
condition, all the band width provisioned for the specif ied CES circuit is used for transpor ting ATM
AAL1 cells across the network from the ingress node to the egress node.

In an on-hook condition, the network periodically sends dummy ATM cells from the ingress node
to the e g res s node to main ta in the c onn ec tio n. Ho we v er, th ese dumm y cel ls con su me on ly a fra cti on
of the c i rcuit’s reserved bandwidth, leaving the remainder of the bandwidth available for use by
other network tr a ffic. This bandwidth-releas e f e a ture en ables th e network to make m or e efficien t
use of its resources.

When th e C A S f ea tu re is en ab led for a C ES ci r cu it, the ban d w id th of th e D S0 chann el is l im i te d to 56
kbps for user data, because CAS functions consume 8 kbps of channel bandwidth for transporting the
ABCD signaling bits. These signaling bits are passed transparently from the ingress node to the egress
node as part of the ATM AAL1 cell stream.

In summ ar y, when th e o p ti on al CA S an d o n -ho ok d et ection fe atu res a re en ab led, the fo ll owing
conditions apply:

• The permanent vi rtu al connec tio n ( P VC) p rovisioned fo r th e C ES cir cu it alw ay s exi sts.

• The bandwidth for the CES circuit is always reserved.

• During an on-hook sta te, most of t he bandwidth re served for the CES circuit is not in use. (Dummy

cells ar e sen t fr o m t he ingre ss n ode to th e eg r ess n od e to m a in tai n th e connect io n. ) Th er ef ore, this
bandw id t h b e c omes ava ila ble fo r us e by oth er network traffic , s u c h a s availabl e bit ra te (ABR )
traffic.

• During an off-hook state, all the bandwidth reserved for the CES circuit is dedicated to that circuit.

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Chapter1 Overview: PA-A2 ATM CES Port Adapter

Circuit Emulation Services Overview

See Chap te r 4, “Configuring the PA-A2 ATM CES Port Adapter,” for more information on the
procedure s for enabl ing the CA S featur e and configu ring str uctu red CES service s.

Network Timing Services for CES Operations

Circuit emulation services internetworking functions (CES-IWF) and constant bit rate (CBR) traffic
relate to a quality of service (QoS) classification defined by the ATM Forum for Class A (AAL1) traffic
in ATM networks. In general, Class A traffic pertains to voice and video transmissions.

In an ATM networki ng environment, CBR refers to a partic ular class of traffic t hat is gene rated by edge
(source ) d ev ice s an d pr opaga t ed in to ATM networks f or t rans mi ss ion to ot her e dge (d est i nati on) de vi ces
in the ne tw or k .

The ATM CES port adapter is designed specifically to handle CBR traffic in an ATM networking
environment. To provide requisite timing functions in support of CES operations, you can specify any
one of t hr e e c l ocking m o d e s covered in the f ol low ing sec t io ns :

• Network Clock Synchronization, page 1-8

• Designating a PRS Source Port in a Cisco 7200 Series Router or Cisco uBR7200 series, page 1-8

• Network Clock Distribution in a Cisco 7200 Series Router or a Cisco uBR7200 series, page 1-9

However, to support synchronous clocking or SRTS clocking in your ATM networking environment,
your networ k m u s t i ncorpor a t e the f ol low ing fac ilities:

• A primary reference source (PRS)—Throughout this docum ent, th e term PRS refers to a preci sio n

referen ce ti min g s ig na l th at mu s t b e mad e available, wh erever r eq ui r ed , to syn ch r on iz e th e f low of
CBR data from its source to its destination.

• Network clock synchronization services—This r ef e r s to a n etw or k cloc k synch r onizati on and

distribution service that provides a PRS to those user and network devices that require a precision
reference timing signal for synchronizing the flow of CBR traffic.

Networ k Clock Sy nchroniz ation

Any const an t bit r ate (CBR ) edge device th at co m mu ni cat es w i th an o th er C BR ed g e device acr oss an
ATM network must be driven by a clocking signal of identical frequency. This “synchronized” signal
contro ls th e rat e of CB R d ata in ser ti on into th e netw ork , and a l so t he ra t e of extra ctio n o f C BR data f rom
the netw ork. If the cl ock freq uency is not s ynchro nized a t both th e ing ress and egress nodes of the ci rcuit ,
the data queues and buffers in the network will either overflow or underflow, resulting in line errors.

Distributing a cloc ki ng si gnal wi th in the net wo rk ens ur es th at ea ch CBR devi c e has ac cess to a common
reference clocking signal, called Primary Reference Source (PRS), for synchronizing CBR data
transp or t.

Designating a PRS Source Port in a Cisco 7200 Series Router or Cisco uBR7200 series

Any port adapter in a Cisco 7200 series router or a Cisco uBR7200 series that can receive and distribute
a network timing signal can propagate that signal to any other port adapter in the chassis that has similar
capabilit ies .

By issuing the network-clock-select command with appropriate parameters, you can define a particular
port in a Cisc o 7200 series router or a Cisco uBR7200 series to serve as th e source of a PRS for the enti re
chassis or f o r ot he r devi ces in the ne two r ki n g e nvironm en t. Th is co m man d en ab les you to d es i gn at e a
particul ar p ort in a C isco 720 0 ser ies rou ter o r a Ci s co uBR720 0 s er ies to s erve as a “master clock”

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source in distributing a single clocking signal throughout the chassis or to other network devices. This
clocking si gn a l c an be di s tr ibu ted whe r ever neede d in the network to globally synch r on ize the flow of
CBR d a ta . Th e us e of this com mand i s d e scribe d in Chap ter 4, “Configuring the PA-A2 ATM CES

Port Adapter.”

Network Clock Distribution in a Cisco 7200 Series Router or a Cisco uBR7200 series

When equi pp ed w ith a n ATM CES port ada pt er an d ap pro pr ia te sof twar e, any Ci s co 720 0 series rout er
or a Cisco uBR7200 series can serve as a me ans for receiving and distributing a P RS to other devices i n
the network.

A Cisco 7200 series router or a Cisco uBR7200 series can make use of a PRS that originates from any
one of sever al sou rces in the net wo rki ng enviro n men t.

Figure 1-6 sh ows t h ree p ossible sou rces of a PRS wh en t wo Cisco 72 06 r o ut er s ar e co nn ec ted

back-to-b ack. However, you shou ld not i nt er pr et th at to m ean th at on ly t hree such cloc ki n g si gn al s can
be made available for u se in the ATM network. In fact, more than three clocking signal s may be present
in the Cisco 7200 series router or Cisco uBR7200 series operating environment.

The important concepts that you should take from Figure 1-6 include the following:

• Up to four clocking signals can be defined per Cisco 7200 series router or a Cisco uBR7200 series

in the ne tw or k .

• The PRS that is used in Cisco 7200 series routers or a Cisco uBR7200 seri es must be traceable to a

single clock source. (In Fi gure 1-6, Rou ter N o . 2 ’s PRS is t ra cea bl e t o Ro ut er N o . 1 ’s PRS.)

Figure 1-6 Cisco 7206 Routers Connected Back-to-Back

Each PRS depicted in Figure 1-6 is external ly g en e r at ed —that is, the timing sig nal orig in at es f r om a
source outside the router. Also shown is an OC-3 trunk line that can propagate a PRS between adjacent
router/network devices.

If the Router No. 1 priority 1 PRS fails (CBR 4/0), the network clock synchronization service
automatically recovers network timing by using the Router No. 1 priority 2 PRS (CBR 4/3).

Assume, for e xa mple, th at th e T1/ E 1 line (CB R 4/0) at Route r No. 1 in Figure 1-6 is currentl y sup pl ying
PRS to th e ne twork. I f th is P R S fa il s , t he T 1 /E1 l in e (CBR 4/3 ) at the same router is used as P R S .

Router 2Router 1

S5969

Cisco 7206

T1/E1 CBR 4/3

OC3/T3/E3

ATM 4/0

ATM WAN

uplink

OC3/T3/E3

ATM 2/0

T1/E1 CBR 4/2

T1/E1

CBR 2/2

T1/E1 CBR 4/1

T1/E1

CBR 2/1

T1/E1 CBR 4/0

T1/E1

CBR 2/3

T1/E1

CBR 2/0

PBX

PBX

PBX

PBX

Cisco 7206

PBX

PBX

PBX

PBX

PRS clock sources

1. CBR 4/0

2. CBR 4/3

PRS clock source

1. ATM 2/0

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Circuit Emulation Services Overview

Router No. 2 has ATM 2/0 as its PRS. If the ATM 2/0 port fails, there is no configured alternate clock
source fo r P R S . Th e de fau lt cl oc k s ou rce i s t he lo cal o s ci lla to r. But, in t hi s ca se, this is not a proble m
because th e t ra ffic from the T 1/ E1 C BR p or ts is a lso d is r u pte d . In th e Cisco 720 0 series ro ut er o r th e
Cisco uBR7200 series, all T1/E1 traffic goes only on the ATM WAN uplink. When ATM 3/0 goes up,
the PRS i s au tomatic all y recovered .

If the Router No. 1 priority 1 PRS is restored to service, the network clock synchronization service
automatically reverts to this PRS for timing purposes, regardless of which lower priority PRS may be
active at the t ime .

Figure 1-7 illustrates Cisco 7206 routers connected to an ATM network. This figure shows how a PRS

can be deri ved from the ATM network and pro vided to a n edge node and prop aga ted throu gh the netw ork
to synchronize the flow of CBR data between the communicating ATM end nodes.

In Figure 1-7, wh en th e PRS cl o ck so urce is taken f ro m t he ATM network, all th e tr an sm i t n od es at th e
edge of the network on T1/E1 trunk lines on the ATM CES port adapter in Routers 1, 2, and 3 are
synchronized.

Figure 1-7 Cisco 7206 Routers Connected to ATM Network

Figure 1-8 illustrates a typical configuration of a network clock source. In this figure, the PBX T1/E1

transmit clocks, ATM CES T1/E1 transmit clocks, ATM CES OC-3/T3/E3 ATM WAN uplinks, and
ATM net wo r k OC-3/T 3 /E 3 ATM port trans m it c l ocks are all derived f ro m and r ef erenc ed to a s in gl e
clock so u rc e, th e P R S . This lim it s th e ji tter and w an d er in t he em u la ted circuit s.

Router 2

Router 3

Router 1

S5970

Cisco 7206

T1/E1

T1/E1

OC3

OC3

ATM WAN

uplink

ATM WAN

uplink

ATM WAN

uplink
T3/E3

T1/E1

T1/E1

T1/E1

T1/E1

PBX

PBX

PBX

PBX

Cisco 7206

PBX

PBX

PRS clock source

1. ATM WAN uplink

PRS clock source

1. ATM WAN uplink

PRS clock source

1. ATM WAN uplink

ATM

network

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Circuit Emulati on Ser v ices Overview

Figure 1-8 Typical Configuration of Network Clock Source

Clocking Modes for CES Opera t i ons

For CES operations, three clocking modes can be used in conjunction with any ATM CES port adapter.
These cl ocking modes ar e descri bed in t he fol lowi ng sec tions i n the re commended order of consid erat ion
and use :

• Synchronous Clocking Mode, page 1-11

• Synchronous Residual Time Stamp Clocking Mode, page 1-12

• Adapt ive Clocki ng Mode , page 1 - 1 2

• Summary of Clocking Modes, page 1-13

Synchronous Clocking Mode

Synchronous clocking mode requires a PRS and network clock synchronization services. When
equipped with an ATM CES port adapter and appropriate software, any Cisco 7200 series router or
Cisco uBR7200 series can serve as a means for synchronizing the flow of user CBR traffic through the
networ k.

Synchro nous cloc king ca n be use d for unst ructure d servi ce (clea r chann el) and i s the on ly cloc king mod e
for struct ur ed (N x 64 k b ps) C ES s er vices . I t i s th e recommen d e d o pt io n fo r th r ee re as o ns:

• First, this clocking mode is the only one that supports full CES functionality. SRTS and adaptive

clocking do not support structured CES services.

• Second, synchronous clocking exhibits superior stability, reliability, and wander/jitter

characteris t ics.

• Third, synchronous clocking is typically used in public telephone systems, making a precision

referen ce si gn al r ead i ly an d w id ely availa b le for th e synchr onizing of CBR dat a t ra nsp o rt .

For the s e reaso ns , s y nchro no us clocking is the defau lt clocking mode f o r all C E S s er vices .

PBX

T1/E1
T1/E1

OC3
ATM

WAN

uplink

OC3
ATM

WAN

uplink

Network clock source

set to ATM WAN uplink

Primary Reference

Source (PRS)

Network clock source

set to ATM WAN uplink

T1/E1 port Tx
clock set to network
derived, synchronized
clocking type used

T1/E1 port Tx
clock set to network
derived, synchronized
clocking type used

PBX Tx clock
source is
derived from
the Rx clock

PBX Tx clock
source is
derived from
the Rx clock

T1/E1

T1/E1

Network clock synchronization
supported in the ATM and ports
Tx clock uses network clock
as reference

S5992

Router Router

PBX

ATM

network

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Circuit Emulation Services Overview

Synchronous Residual Time Stamp Clocking Mode

Synchronous residual time stamp (SRTS) clocking requires a PRS and network clock synchronization
services . SRTS, which can be used only for unst ru ctur ed servi c es, ca rrie s asyn ch ronous DS1 circ ui ts . In
this case, the in pu t s er vi ce clo ck f r eq ue ncy m u st be recovered at the o ut pu t CES-IWF. SRTS is one of
the clockin g modes that can be used fo r r ec overing t his clock fr equen cy.

The SRTS clocking mode, which requires a network-wide reference clock, measures the service clock
input f re qu e n cy again s t a network -w ide sy nchro ni zation signal t h at must b e p r e se n t in the CES - I W F,
and sends different signals, called residual time stamps, in the AAL1 header to the reassembly IWF. At
the outp ut IW F, the differen ce s ca n be co m b in ed wit h th e n e t work - wid e s y n ch ron ization si gn al , t o
re-crea te the input service clock. The network-wi de referenc e clock is d escribed in the “Network Clock

Distribution in a Cisco 7200 Series Router or a Cisco uBR7200 series” section on page 1-9.

Adapti ve Clocking M ode

Adapti v e cl ocki ng mode r equir es ne ithe r a P RS nor ne t wor k cl ock s ync hro niza tion s ervi ces for e f f ect iv e
handling of CBR traffic. However, as is the case with SRTS clocking, adaptive clocking can be used
only for un str u ct ured ( cl ear ch an n el) C ES s er vices .

Note Althoug h th is clock i ng m o d e i s th e s im p le s t a nd easiest to imp le m en t i n an ATM networ k , it exhibits

the poore st w a nder a nd jitt e r perf orm anc e of all th e a va i labl e cloc king mo des. T here fo re , Ci sco does no t
recommend its use, except in instances where a PRS and network clock synchronization services are not
available.

The term adaptive clocking is used because the rate at which CBR data is propagated through an ATM
network is dr iven by the rate at wh ich such d at a is intr o du ce d into th e network by the u s er’s edge
equipment.

For example, adapt ive clocki ng in an ATM CES po r t ad a p t e r derives ti ming fo r data tr anspor t by
calcula tin g th e “average” rate at which data arrives and conveying that data to the output port of the
module at an equivale nt rate. For this r eason, the actual ra te of CBR data flow t hrough the network may
vary when adaptive clocking is used, depending on how rapidly CBR data is being introduced into the
networ k.

CBR data transport through the network occurs in a “pseudo synchronous” manner that ensures the
integrity of the data.

Rather than using a clocking signal to convey CBR traffic through an AT M network, adaptive clocking
obtain s ap p ro p r iat e timing f o r da ta t r ansport by calcul ati ng a n averag e data ra te fo r the CBR traffic.

For exampl e, if CB R d ata is arrivi ng at an ATM CES port ad ap te r at a rate o f so m any b it s p er se c on d,
then that r a t e i s used, in effect, to gov er n the flow o f CB R data th rou gh the netw or k . M ea nw h ile,
however, the ATM CES po rt adapter au to m at ic all y cal cu lates the aver ag e d at a r at e by me an s of
microc ode (firmware) buil t int o th e b oar d. T his ca lcul a ti on oc curs wh ile use r d ata tr av e rse s t he netw or k.

When the A TM CES port adapter senses that its segmentation and reassembly (SAR) buffer is filling up,
it increases the rate of the transmit (TX) clock for its output port, thereby “draining” the buffer.

Similarly, the ATM CES port adapter slows down the transmit clock of its output port if it senses that
the bu ffe r is b eing “drained” fast er th an C B R d ata is bein g r ece ived. In this mann er, ad ap tive cl oc king
attemp t s to m i nimize w i de variat io ns in SAR buff e r lo ad ing while pr ov id in g an effe ct ive m eans of
propagating CBR traffic through the network.

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Chapte r1 Overview: PA- A2 ATM CES Por t Adapter

Circuit Emulati on Ser v ices Overview

Implemen ting ada pti ve clo ckin g is simpl e and st raight forwa rd, bec ause it d oes not require network clock
synchron i zat io n services, a P R S , o r th e a dvan ce pl an ni ng t yp ic ally asso cia te d w i th th e developmen t o f
a logical network timing map. However, adaptive clocking does not support structured CES services,
and it exhibit s rela tively hig h wand er charac teri stic s.

Summary of Clocking Modes

Table 1-1 summarizes the characteristics of the three clocking modes available for handling CBR traffic

in an ATM networking environment. Although the wander and jitter characteristics of these clocking
modes differ, each mode preserv es the integrity of the user’s CBR data, ensuring its error-free transport
from source to destination.

Other Network Factors Relevant to CES Operatio ns

The following factors affect the functioning of CES circuits:

• The inten de d sou r ce an d d est in at io n no d es f o r C ES cir cu it s.

• The cl ocking mode that be st suits your particular netw ork topology and timing requiremen ts for the

handling of CBR data.
Although synchronous clocking is the recommended (default) clocking mode for CES operations,

this fact does not preclude other clocking modes from consideration.

• The cell d e la y variati on ( C DV) ch ar act er ist ics of the netw ork , measured in m i cr ose co nd s .

• Each end- to - en d CES circui t ex hi bi ts d elay char ac ter ist ics, base d o n th e fo ll owi ng f act or s:

–

The delay characteristics of the individual devices participating in the CES circuit. Each
network d evice contribut es s o me increment of de la y, reflecti ng t ha t d evic e’s uniqu e electr ical
characteris t ics.

Table 1-1 Clocking Mode s for CBR Traffic

Clocking Mode Advantages Limitations

Synchronous Supports both unstructured (clear

channel) an d str u ctu r ed C BR t ra ffic.
Exhibits superio r wa nder a nd jitter

characteris t ics.

Requires network clock
synchronization services.

Ties the CES interface to the network
clock sync hroni zatio n serv ices cl ocking
signal (PRS).

SRTS (synchronous
residual ti m e stamp)

Conveys externally generated user
clocking signal through ATM
network, providing independent
clocking signal for each CES circuit.

Requires network clock
synchronization services.

Supports only unstructured (clear
channel) CBR traffic.

Exhibits moderate wander
characteristics.

Adaptive Does not require network clock

synchron izat ion ser vices.

Supports only unstructured (clear
channel) CBR traffic.

Exhibits poorest wander charac teristics.

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Circuit Emulation Services Overview

–

The number of intermediate hops through which the CBR data must pass in traversing the
netwo rk from s ource t o dest inatio n. Th e netw ork desi gner/a dmini str ator calc ula tes a CD V v alu e
for each hop in the data path in order to establish a maximum allowable CDV value for the
networ k at large .

–

The type and speed of the trunk lines interconnecting the ATM networks.

–

The volume of traffic being handled by the trunk lines at any given time, that is, the degree to
which the network may be experiencing congestion conditions.

Network designers and administrators calculate a maximum allowable CDV value for the network in
order to establish network cell delay tolerance limits. Thus, to some degree, the network’s maximum
allowable CDV value is a measure of the network’s expected perform an ce.

When a CDV threshold for the network is established, appropriate buffer sizing can be derived for the
network devices involved in any given CES circuit. This helps to ensure that the network will operate
as expecte d.

In the ca se o f an ATM CES por t ad apt er, for exa mp le, the m ax imu m allowable CDV valu e fo r th e
network is used to de te rmine an a pp r op riat e s i ze (d ep th ) f or t he s egm en tation an d re asse m bl y (SA R)
buffer bui lt into t he board . This s izing of t he SAR buffer prevents bu ffer overflow or und e r fl ow
conditio n s. A n overf low co n di tio n can cause a loss o f fra m es, and an u nde rf low co ndit io n can cause
frames to be r ep eat ed .

The actual CDV value for a circuit varies accord in g t o th e p ar t icu la r da ta pa th used for th e circuit .
Consequently, the depth of the SAR buffer may increas e or decrease in proportion to t he CDV value for
the CES circuit being set up.

You can issue th e show ces circuit interface command i n a n un str u ct ured ( cl ear ch an n el) c ir cu it to
measure the current CDV value. See Chapter 4, “Configu r in g the PA-A2 ATM CE S P o r t Adap te r,” for
more information on verifying a configured hard PVC.

For an unst ru ct ur ed h ar d PV C, the CDV value f o r t h e ci r cui t (i nc lu di ng a ll ho p s) s hould not exceed a
maximum allowable CDV value. The procedure for setting up a hard PVC is described in

Chapter 4, “Configuring the PA-A2 ATM CES Port Adapter.”

For an unst ru ct ur ed h ar d P VC, the ne two r k au to m at ica ll y det e rm i ne s th e b est data p ath through th e
network and handles the routing of CBR traffic. The network accomplishes this dynamically by means
of the ATM connection admission control (CAC) mechanism. The CAC determines the best path
through the network by executing a routing algorithm that consults local routing tables in network
devices.

If the requested data path is equal to or les s than the maximum allowable CDV value established by the
network adminis tra to r, the connect io n re qu est is gr an te d. I f t h e r eq ue sted CES cir cu it exc eed s t he
maximum allowable CDV value, th e co nn ec ti on re qu est is d en ied . T he s e co nnection ad mis si o n co n tro l
processes occur “on the fly” as network connection requests are initiated.

For example, when a user requests a connection from source node A at one edge of the network to
destin ati on no de B at th e o ppo sit e edg e of the ne t wor k, th e CAC mec hani sm t ake s int o a cco unt th e CD V
value for each hop in the requested connection to determine a suitable path through the network that does
not exceed the ne twork’s maximum al lowable CDV value.

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PA-A2 ATM CES Port Adapter Overview

PA-A2 ATM CES Port Adapter Overview

The ATM CES port adapter i s a du al-wi de modu le. It has f our T1 ( 1.544 Mbps) or four E 1 (2 .048 Mbps)
120-ohm constant bit rate (CBR) ports that can support both structured (N x 64 kbps) and unstructured
ATM Forum-co m p lia nt ci rc ui t em u lat io n ser v ices (CES) , an d a single p ort of an OC - 3 ( 1 55 Mbps)
single-mode intermediate reach or a T3 (45 Mbps) or E3 (34 Mbps) standards-based ATM interface.
(See Figure 1-9 and Figure 1-10 for exampl es of each versio n .)

The ATM CES port adapter can be used only on a Cisco 7200 series router or a Cisco uBR7200 series
that has a 150-MHz network processing engine (NPE-150).

The target application of the ATM CES port adapter is access to a broadband public or private ATM
network where multiservice consolidation of voice, video, and data traffic over a single ATM link is a
requireme nt.

Table 1-2 li sts t h e d iffer en t t yp es of ATM CE S port adap ter s a nd t he ir asso ciated pa rt n umb er s.

Figure 1-9 PA-A2 ATM CES Port Adapter—PA-A2-4T1C-OC3SM(=) or PA-A2 4E1XC-OC3SM(=)

Figure 1-10 PA-A2 ATM CES Port Adapter—PA-A2-4T1C-T3ATM=) or PA-A2 4E1XC-E3ATM(=)

You can inst all a PA-A2 ATM CES p ort adapter i n any availabl e, h o ri zo nt al ly al ig ne d, po r t of
port adapter slots in a Cisco 7200 series router or a Cisco uBR7246.

Table 1-2 PA-A2 ATM CES Por t Adapter Types and Part Numbers

ATM-CES Type Part Number

4 T1 CBR ports and 1 OC-3 ATM SM

1

port

1. SM = single mo de

PA-A2-4T1C-OC3SM(=)
4 T1 CBR ports and 1 T3 ATM port PA-A2-4T1C-T3ATM(=)
4 E1 120-ohm CBR ports and 1 OC-3 ATM SM port PA-A2 4E1XC-OC3SM(=)
4 E1 120-ohm CBR ports and 1 E3 ATM port PA-A2-4E1XC-E3ATM(=)

ENABLED

RCLK

FERF

OC3-SM

OOF

AIS

0

0

ENABLED

1

2

T1

3

ALARM

3

2

1

Complies With Part 68, FCC Rules
FCC Registration Number
nxnUSA-nnnnn-XD-x

ATM-CES

H9624

ATM port

CBR ports

H9625

RCLK

XMTR

RCVR

0

0

ENABLED

1

2

T1

3

ALARM

3

2

1

FERF

T3

OOF

AIS

Complies With Part 68, FCC Rules
FCC Registration Number
nxnUSA-nnnnn-XD-x

ATM-CES

ATM port

CBR ports

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PA-A2 A TM CE S Port Adap ter Overv i e w

In previous versions of PPP over ATM, you configure permanent virtual circuits (PVCs) for PPP over
A TM on point-to-point subinterfaces. In the current Cisco IOS releases (see the “Minimum Software and

Hardware Requirements” section on page 2-1), each PPP over ATM connection no longer requires two

Internet D ata Blocks ( I DBs ) , o ne for vi rt ua l ac cess i nt er fac es, an d on e f or ATM subinterfaces . In ste ad ,
you can configure multiple PVCs for PPP over ATM on multipoint subinterfaces.

The new ve rsion of PPP over ATM also complies with the Int ernet Engineering Task Force (IETF) draft
on multiplexed encapsulation. The previous version of PPP over ATM supported Cisco's Frame
Forwarding da ta en cap s u lat io n (a al5 ci sco pp p ). In th e current C isco IOS so f twar e r el eas e s (s ee th e

“Minimum Softw are and Hardware Requirements ” section on page 2-1), PPP over ATM is enhanced to

support virtual circui t (VC) multiple x ed PPP payl oads as spe cif ied by the PPP o ve r AAL5 Int ernet Dr aft
(12/23/97). Therefore, the name for this new PPP over ATM feature is more accurately IETF PPP over
ATM.

Note The IETF PPP over ATM feature does not currently support LLC encapsu lated PPP ov er ATM Adaption

Layer 5 (AAL5).

Features

The PA-A2 ATM CES port a dapter has the following features:

• Cross-connect Circuit Emulation Services (CES)—Str u ctu r ed an d u nst ruct ur ed

• Four-port T1 or E1 (120-ohm) constant bit rate (CBR) for CES

• Network timing distribution

• On/off hook Channel Associated Signaling (CAS)

• Segmentation and reassembly (SAR) of up to 512 buffers simultaneously, where each buffer

represent s a tr an s mi t ch an n el

• Up to 2046 virtual circuits (VCs) and 124 CBR VCs

• ATM adaptation layer (AAL) 5

• Single-port SONET/SDH OC-3 single-mode intermediate reach ATM uplink

• Single-port DS3 ATM WAN uplink over T3/E3

• Traffic shaping (per VP and V C )

• ABR, CBR, VBR, and UBR Quality of Service (QoS)

• Operation, Ad m i ni s tr ati o n, and Ma in te nan c e ( OAM ) ce lls

• Online insertion and removal (OIR)

In addition, the ATM CES port adapters now support the following additional features:

• New VC configuration

• VC integrity management

• PVC dis covery

• Multiprotocol inverse ARP

• PPP over ATM

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Chapte r1 Overview: PA- A2 ATM CES Por t Adapter

LEDs

LEDs

The PA-A2 ATM CES port a da pt er h as 1 3 LED s t h at indicat e t he sta tu s o f th e p o rt ad ap te r, the sta tu s
of the uplink ports, and the status of the CBR ports. (See Figure 1-11 and Figure 1-12.)

Figure 1-11 LEDs on the PA-A2 ATM CES Port Adapter—OC-3 Single Mode

Figure 1-12 LEDs on the PA-A2 ATM CES Port Adapter—T3/E3

After syst em in itializati on , th e en ab led LED go es o n to ind i cat e th at th e PA-A2 ATM CES port adapte r
has been enabled for operation.

The following conditions must be met before the

PA-A2 ATM CES port adapter is enabled:

• The PA-A2 ATM CES port adapter is correctly connect ed an d is r e ceivi ng p ower.

• A valid system softw are imag e for the PA-A2 AT M CE S port adapter has b een downloade d

successfull y.

• The system recognizes the in stalled PA-A2 ATM CES port a dapter.

If any of the above conditions are not met, or if the initialization fails for other reasons, the enabled LED
does not go on .

Table 1-3 describes the LED that indicates port adapter status.

Table 1-4 describes the LEDs that indicated uplink port status.

ENABLED

RCLK

FERF

OC3-SM

OOF

AIS

0

0

ENABLED

1

2

T1

3

ALARM

3

2

1

Complies With Part 68, FCC Rules
FCC Registration Number
nxnUSA-nnnnn-XD-x

ATM-CES

H9626

LEDs

ENABLED

RCLK

XMTR

RCVR

0

0

ENABLED

1

2

T1

3

ALARM

3

2

1

FERF

T3

OOF

AIS

Complies With Part 68, FCC Rules
FCC Registration Number
nxnUSA-nnnnn-XD-x

ATM-CES

H9627

LEDs

Table 1-3 Port Adapter Status LEDs

LED Label Color State Description

ENABLED Gre en On PA-A2 ATM CES p or t adapter i s en ab l ed fo r

operation .

Table 1-4 Uplink Port Status LEDs

LED Label Color State Description

RCLK Green On Indicates th at a receive clo ck wa s d ete cted.
FERF Yellow On Indicate s th at F r amer detec ted Fa r En d Re ceive

Failure.

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PA-A2 ATM CES Cabl es, Connectors, and Pin outs

Table 1-5 describes the LEDs that indicated CBR port status. There are four Enabled and four Alarm

LEDs, one for ea ch por t.

PA-A2 ATM CES Cables, Connector s, and Pi nouts

Cables on the ATM CES port adapter fall into two categories described in the following sections:

• ATM Port Cables, page 1-18

• CBR P or t Cables, page 1 -1 9

ATM CES po r t a da pt er in terfaces ar e f u ll -d u plex. You must u s e t he ap p ro p ria te ATM interface cab le
and CBR cab le to c onn ect th e ATM CES p o rt ad ap te r w ith a n ex ternal ATM network. Th e ATM CES
port adapter s, s h own in Figure 1-9 and Figure 1-10, provide s an in terface to ATM switchin g fa br ics for
transmitting and receiving data at rates of up to 155 Mbps bidirectionally for OC-3, 44.736 Mbps
bidirectionally for DS3 over T3, and 34 Mbps bidirectionally for E3.

ATM Port Cables

T w o types of cables are available for use with the ATM CES port adapter’s OC-3 and T3/E3 ATM ports:

• An OC-3 s in gle -m o de ATM interface cab le , w h ich i s u sed to connect a r o uter t o an external DSU

(an ATM network)

• A T3/E 3 7 5 -o h m coaxial in ter fa ce cable, w h ich i s u sed to conn ect a r o ut er to an extern al D S U (a n

ATM network)

Both ATM cables conf orm t o th e E IA / TI A-6 1 2 and E IA/TIA-61 3 s pec ifi cat io ns. Th e ATM port on t he
ATM CES port adapt e r is a DTE device.

For OC-3 sing le -mod e, t he ATM CES port ad apte r conn ect s to the SONET /SDH 1 55- Mbps si ng le-m ode
optical fiber physical layer, either STS-3C or STM-1. The connection is made by mean s of single - m ode
OC-3 ATM cables wit h SC connector s ( see Figure 1-13). The SONET single-mode SC connector is
shipped w i th r emovab le d ust cove rs on ea ch S C co nn ec to r. Keep covers on any connectors th at ar e n o t
being use d.

OOF Yellow On Indicate s th at Frame r d et ected Ou t o f Fr am e .
AIS Yellow On Ind ic ate s th at F ramer detected Ala rm I n di cat io n

Signal.

Table 1-4 Uplink Port Status LEDs

Table 1-5 CBR Port Stat us LEDs

Enabled LED State Alarm LED State Decription

Off Off Indicate s th at th e p o rt i s ad m in i s trativel y d ow n.
Off On (yellow) Indicates that the port is in loop mode.
On (green) Off Indicate s th at th e p o rt i s en ab led (normal stat e) .
On (green) Blink in g ( ye llow ) Indicate s an in teg r tin g s ta te, an idle state, a

yellow or a blue alarm.

On (green) On (yellow) Indicates a red alarm condition.

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PA-A2 ATM CES Cables, Connectors, and Pinouts

For SONET/STC-3C single-mode connections, use one duplex SC connector (see Figure 1-13) or two
single SC connector s ( see Figure 1-14).

Figure 1-13 Dupl ex SC Connector

Figure 1-14 Simplex SC Connector

For T3/E3 c on n ect io ns, u s e a 75 -oh m c oa xi al in te rf ace cab l e ( see Figure 1-15). The T3/E3 75-ohm
coaxial cable is available from Cisco in five different lengths: 10, 25, 50, 75, and 100 feet. They are not
available from outside commercial vendors. The typical maximum distance between stations for T3
transmissions is 450 feet (135 meters) and for E3 transmissions is 1300 feet (390 meters).

Figure 1-15 T3 /E3 75-Ohm Coaxial Cable and Connector

Note For connections in Australia, interconnecting cables shall comply with TS 016, clause 5.5.5.2: “The

maximum interc on n ect in g cab le inserti on l oss sha ll no t exceed 12 dB meas u re d at 17 ,1 84 kHz. Th is
attenuation should take into account any losses incurred by the presence of a digital distribution frame
betwee n eq uipm en t.”

The T3/ E3 line interface pe r fo r m s p hy s ic al lay e r t ra nsl ation fr o m th e ATM CES p o rt ad ap ter to th e
T3/E3 lin e i nt er face in accor d an ce wi th ATM Forum UNI s p ec ific ati o n Version 3.1, ACCU N ET T4 5
service specifications, and ANSI T1E1.107.

CBR Port Cables

The four CBR interface receptacles on the ATM CES port adapter are RJ-48C for T1 and E1 (120 ohm).
Each connection supports T 1 or E1 (120-ohm) interfaces that mee t T1E1.403 a nd ACCUNET TR6241 1
standards. The RJ-48C connection does not require an external transceiver. The CBR ports are T1

H2214

H2399

75-ohm coaxial cabling

BNC plugBNC plug

H3399

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ATM Managem ent Informat ion Base Specif ications

interface s th at u s e U TP, 100-ohm twist ed p air cables an d E 1 in ter fa ces that us e U T P, 120-ohm tw isted
pair cabl es ( see Figure 1-16). The typical maximum distance between stations for T1 and E1
transmissions is 1000 feet (300 meters).

Note For RJ-48C T1 and E1 (120-ohm) connections in the U.S. and Canada, you can u se UTP cables to meet

FCC Part 15 Class A EMI requirements. For RJ-48C T1 and E1 (120-ohm) connections in Japan and
other co untr i es , y o u can u se S T P ca bl es t o meet V C CI C lass II E M I re qu ir ements.

Figure 1-1 6 CBR 120-Ohm RJ-48C Interface Cable and Connector

ATM Management Inform ation Base Speci ficat ions

The ATM UNI specification d efines t he required m anagement information base (MIB) functionality for
ATM interfa ces. MIB attribu te s ar e r ea da bl e and writ able acro ss th e In te ri m Local Ma na ge m en t
Interface (ILMI) through use of the Simple Network Management Protocol (SNMP). The ILMI uses
SNMP, without UDP, and Internet Protocol (IP) addressing along with the ATM MIB.

The ATM CES port adapter supports RFC 1213, RFC 1406, RFC 1407, and SONET MIB RFC 1595
interface M IB s . R ef er t o th e ATM UNI s pe cifi cat io n fo r ad ditiona l d et ails on th e M I Bs .

Fibre-Optic Transmissi on Specifi cat ions

The following sections describe the SONET specifications for fiber-optic transmissions, define the
power budget, and help you approximate the power margin for single-mode transmissions:

• Maximum Transmission Distances for SONET, page 1-20

• Power Budget, page 1-21

Maximum Transmi ssi on Distanc es f or SONET

The SONET specification for fiber-optic transmission defines two types of fiber: single-mode and
multim ode. M o des ca n be tho ug ht of a s bundl es o f light rays e nt e r in g the fibe r at a p a r ticular angle .
Single-mode fiber allows only one mode of light to propagate through the fiber, while multimode fiber
allows m u lti pl e modes of lig ht to p r opagate throug h th e fi ber. Because multiple mod es o f li gh t
propagating through the fiber travel different distances, depending on the entry angles, they arrive at the
destination at different times (a phenomenon called modal dispersion). The typical maximum distance
between stations, as defined by SONET, for single-mode transmissions is up to 9 miles (15 kilometers).
The ATM CES port adapter uses single-mode fiber, which is capable of higher bandwidth and greater
cable run d ist an ces th an m u lt im o d e fiber.

H10253

8 7 6 5 4 3 2 1

RJ-48c connector

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Fibre-Optic Transmiss ion Specifications

Use the power budget calculations in the following section to determine actual distances. If the distance
between two connected stations is greater than this maximum distance, significant signal loss can result,
making transmission unreliable.

Power Budget

To desig n an efficien t o p ti cal d ata li nk , evalu ate th e pow er bu dg et . Th e pow er bu dg et is the am oun t o f
light availab le to over co m e attenu ation in th e o p tical li nk a nd to ex ceed the m i n im u m p owe r th at th e
recei v er re quire s to oper ate withi n it s spec if ic ati on s. Pro per opera tio n of a n optic al da ta l ink depe nds on
modulated light reaching the receiver with enough power to be correctly demodulated.

Attenuation, caused by the passive media components (cables, cable splices, and connectors), is
commo n to si ngle-m ode tra nsmiss i on .

The following variables reduce the power of the signal (light) transmitted to the receiver in single-mode
transmission:

• Chromatic dispersion (spreading of the signal in time because of the different speeds of light

waveleng ths)

• Modal dispersion (spreading of the signal in time because of the different propagation modes in the

fiber )

Attenuation is significantly lower for optical fiber than for other media. For fiber-optic transmission,
chromatic and mo dal dispe rsion redu ce the availabl e p ower of t he s y stem by the c ombined di spe rsion
penalty (me a sured in d e ci bels). The pow e r l os t ove r t he data link is th e s um of the com p o ne n t ,
dispersion, and modal losses. However, at OC-3 speeds on single-mode fiber, dispersion and modal
losses are minimal.

The following sections offer more detail on power budgeting:

• Approximating the ATM CES Port Adapter Power Margin, page 1-21

• Using S tat ist ics to E stimate th e P ow er B ud g et, page 1 -2 3

• For Further Reference, page 1-23

Approximating the ATM CES Port Adapter Power Margin

The single-mode signal source is an injection laser diode. Single-mode transmission is useful for longer
distance s, b ecause there is a s i ng le tr an sm i s sio n pa th w it hi n th e fi be r and smear d o e s n o t o ccu r. In
addition, chromatic dispersion is also reduced because laser light is essentially monochromatic.

The maximum overload specification on the single-mode receiver is –8 dBm. The single-mode receiver
can be overloaded when you are using short lengths of fiber, because the transmitter can transmit up to
–8 dB, but no damage to the receiver will result from an overload.

Note If you ar e c on n ect in g to a non-C is co single-m od e S O NE T r ec eiver or t ra nsmitter, inse rt a 5- to 1 0-d B

attenuator o n t he lin k t o prevent overloa di ng the receiver that c on nects s ho r t fiber li nk s .

Higher ord er mode l oss ( HOL) re sults fro m light fr om t he L ED ente ri ng th e fiber an d bei ng radi ate d int o
the fiber cladding. A worst case estimate of power margin (PM) for single-mode transmissions assumes
minimum tra nsm itte r po we r (PT ), maxi mum link lo ss (LL), an d mini mum rec ei v er se nsi ti vi ty (PR). The
worst case analysis pro v ides a margin of error; not all of the part s of a n actu al system will op erate at the
worst case leve ls .

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Chapter1 Overview: PA-A2 ATM CES Port Adapter

Fibre-Op ti c Tr ansmission Specification s

The fo llow i n g equati on lists th e calcul a t io n of the power bu dg e t :

PB = PT – PR

The SONE T s p eci fica tio n re q uire s th at th e s ig na l m eet the wo rst ca s e p ar ameters list ed in Table 1-6.

In the f ollowin g exa mple o f a s ingl e- m od e pow er budge t , two bui ld in gs, 8 k ilome ter s a part, a re
connected through a patch panel in an intervening building with a total of 12 connectors.

Length of single-mode link = 8 km
12 con nector s

The powe r marg in is equa l t o th e P B val ue minu s th e link lo s s:

PM = PB – LL
PM = 16 dB – 8 km (0.5 dB/km) – 12 (0.5 dB)
PM = 16 dB – 4 dB – 6 dB
PM = 6 dB

The value of 6 dB indicates that this link has sufficient power for transmission and does not exceed the
maximum receiver input power.

If the p owe r m arg in is po sitive, as a rule, the l in k w ill work.

Table 1-7 li s ts t he factors t hat contr ibu te to link l os s and the estimate o f th e li nk loss val ue at tr ibu tab le

to each fa cto r.

The power ma rg in (calculated above) s ho u ld be g re a t e r th an zero . Ci rcuits whos e results are less th a n
zero ma y have i nsu fficien t power to o pe ra te th e r eceiver.

Table 1-6 PA-A2 ATM CES Port Adapter SONET Signal Requirements

Value Single-Mode Signal

PT -15 dBm
PR -31 dBm
PB -16 dBm

Table 1-7 Typical Link Loss Factors and Values

Link Loss Factor Estimate of Link Loss Value

Higher order mode losses 0.5 dB
Clock recovery module 1 dB
Modal and chromatic dispersion Dependent on fibre and wavelength used
Conn ec t or 0.5 dB
Splic e 0.5 dB
Fibre attenuation 1 dB /k m

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Chapte r1 Overview: PA- A2 ATM CES Por t Adapter

Setting ATM CES Port Adapter Jumpers

Using Statistics to Estimate the Power Budget

Statistical models more accurately determine the power budget than the worst case method. Determining
the link loss with statistical methods requires accurate knowledge of variations in the data link
components. Statis tical pow e r bud g et analy s i s is beyond the scope of this d ocument. For fur th e r
information, refer to UNI Forum specifications, ITU-T standards, and your equipment specifications.

For Further Reference

The following publications contain information on determining attenuation and power budget:

• T1E1.2 /9 2- 0 20 R2 ANSI , t he D r af t A m e ri can Natio nal Sta nd a rd for Telecom mu ni cations en tit led

Broadband I SD N Customer Inst al la ti on Interf aces: Ph ysi c a l Layer S pe cification

• Power Margin A naly sis, AT&T Technical Note, TN89-004LWP, May 1989

Setting ATM CES Port Adapter Jumpers

Depending on the circumstances, you might need to change the configuration of the ATM CES port
adapter’s receive interface from ungrounded to grounded. (The ATM CES port adapter is configured in
manufactu ri ng f o r un g ro u nde d at t he re ceive i nt er face.) The fol lowin g steps expl ain h ow to set th e
configuration for grounded or ungrounded:

Step 1 Attach an ESD-preventive w r ist strap t o yo u rse lf an d to an u nfinished ch ass i s s u rface.
Step 2 Remove the PA-A2 ATM CES port adapter from the chassis. To do so, follow the steps in the “Port

Adapt e r R e m oval a n d Installati on” section on page 3-6.

Step 3 With the PA-A2 ATM CES p ort adapter o n an an ti static ma t, u s e a n u m be r 1 Phi ll ip s s cr ewd river t o

remove the t hr ee s crews t h at secure the pl ast ic s hi eld t o th e ATM CES por t ad ap ter’s printed circuit
board. (See Figure 1-17.) Save the screws.

Step 4 Set the jumper on the PA-A2 ATM CES port adapter to grounded (covered pins) or ungrounded

(uncovered pins). This jumper is at location E1 on the port adapter’s cir cuit boa r d . S e e Figure 1-18.

Note The PA-A2 ATM CES port adapter is configured in manufacturing for ungrounded (uncovered

pins) at th e re ceive i nt er fac e.

Step 5 Replace th e p la stic shield over th e PA-A2 ATM CES p o rt ad ap te r’s jum p er an d secu r e th e s hi eld t o t he

port adapter’s printed circuit board using a number 1 Phillips screwdriver and the three screws that you
saved.

Step 6 Replace the PA-A2 ATM CES port adapter in the chassis. To do so, follow the instructions in the “Port

Adapt e r R e m oval a n d Installati on” section on page 3-6.

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PA-A2 ATM CES Por t Adapter Slot Locations on t he Supported Platforms

Figure 1-17 Removing the Plastic Shi eld

Figure 1-1 8 Location of Jumper on PA-A2-4E1XC- E3ATM

PA-A2 ATM CES Port Adapter Slot Locations on the Suppor ted
Platforms

This section discusses the module slot locations on the supported platforms. The illustrations that follow
summariz e s l ot lo ca ti on co nventio ns o n ea ch p lat fo rm :

• Cisco 7200 S e r ies Rou ters a n d C i sco uBR72 0 0 S eries Rout er s S l ot Num bering , page 1- 25

Screws

Plastic
shield

H10055

H10052

E1

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PA-A2 ATM CES Port Adapter Slot Locations on the Supported Platforms

Cisco7200 Series Rou t ers and CiscouBR7200 S eries Routers Sl ot Nu mb ering

Slots in the Cisco 7202 router are numbered from left to right, slot 1 and slot 2. (See Figure 1-19.)

Figure 1-1 9 Modul e Slots in the Cisco 7202

Slots in the Cisco 7204 router are numbered from left to right, beginning with slot 1 and continuing
through slot 4. Slot 0 is the Fast Ethernet port on the I/O controller. (See Figure 1-20.)

Figure 1-20 Module Slots in the Cisco 7204

0

2

1

CLASS 1 LASER PRODUCT

LASERPRODUKT DER KLASSE 1

PROUIT LASER DE CLASSE 1

PRODUCTO LASER CLASS 1

ENABLED

RX CELLS

RX CARRIER

RX ALARM

ENHANCED ATM

155-SMI

RX

TX

CPU RESET

1O POWER

OK

FAST ETHERNET INPUT/OUTPUT CONTROLLER

ENABLED

PCMCIA

EJECT

SLOT 0

SLOT 1

Cisco 7200

SERIES

11603

Port adapter slot 1

Port adapter slot 2

(blank port

adapter installed)

H7399

2

ENABLED

0

2

1

3

LINK

0

1

2

3

EN

TD

TC

RD

RC

LB

CD

TD

TC

RD

RC

LB

CD

TD

TC

RD

RC

LB

CD

TD

TC

RD

RC

LB

CD

ENABLED

MII

LINK

RJ45

FAST ETHERNET

0

0

4

1

3

Port adapter slot 3
Port adapter slot 1

Port adapter slot 4

Port adapter slot 2

ETHERNET-10BFL

EN

RX

0

1

2

3

4

TX

RX

TX

RX

TX

RX

TX

RX

TX

Cisco 7200

SERIES

Blank port adapter

MII
EN

RJ45

EN

RJ45
LINK

1O PWR

OK

RJ-45

CPU RESET

FAST ETHERNET INPUT/OUTPUT CONTROLLER

ENABLED

PCMCIA

EJECT

SLOT 0

SLOT 1

FE MII

Port adapter slot 0

ETHERNET 10BT

FAST SERIAL

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PA-A2 ATM CES Por t Adapter Slot Locations on t he Supported Platforms

Slots in the Cisco 7206 are numbered from 1 through 6; slot 0 is reserved for the optional Fast Ethernet
port on the I/O controller—if pre s en t. (See Figure 1-21.)

Figure 1-2 1 Modul e Slots in the Cisco 7206

Figure 1-22 shows the slot numbering of modules installed on a Cisco uBR7246 router. The slots are

numbered slot 1 and slot 2 for the Cisco uBR7246 and slot 1 for the Cisco uBR7223. (Slot 0 is always
reserved for the Fast Ethernet port on the I/O controller—if present.)

Figure 1-2 2 Modul e Slot s in the Cisco uBR7246

28329

2

ETHERNET-10BFL

EN

RX

0

1

2

3

4

TX

RX

TX

RX

TX

RX

TX

RX

TX

0

4

1

3

5

6

TOKEN RING

0

1

2

3

Cisco 7200

Series

FAST ETHERNET INPUT/OUTPUT CONTROLLER

ENABLED

PCMCIA

EJECT

SLOT 0

SLOT 1

FE MII

EN

0

7

1

2

3

4

5

6

SERIAL-V.35

ETHERNET 10BT

ENABLED

0

2

1

3

LINK

0

1

2

3

MII

EN

RJ-45

EN

RJ-45

RJ-45

LINK

1O PWR

OK

ENABLED

MII

LINK

RJ45

FAST ETHERNET

0

Port adapter slot 5

Port adapter slot 3

Port adapter slot 1

Port adapter slot 6

Port adapter slot 4

Port adapter slot 2

Port adapter slot 0

ENABLED

DS

uBR - MCI6

US

US

US

US

0

1

2

5

ENABLED

DS

uBR - MCI6

US

US

US

US

0

1

2

5

ENABLED

DS

uBR - MCI6

US

US

US

US

US

US

0

1

2

3

4

5

ENABLED

DS

uBR - MCI6

US

US

US

US

0

1

2

5

H11323

Cable modem card slot 3
Cable modem card slot 4
Cable modem card slot 5
Cable modem card slot 6

Port adapter slot 0
(I/O controller)

Port adapter slot 1
(blank)

Port adapter slot 2

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Identifying Inter fa ce Addr esses

Identifying Interface Addresses

This section describes how to identify the interface addresses for modules in supported platforms.
Interface ad d re s ses sp ec if y th e actual p hy sical locat io n of e ach i nt er fac e o n a r o ut er o r s wi tc h.

Interfaces o n th e module in s tal led i n a r o ut er m ai n tai n th e s a m e a dd r ess regardless o f wh et he r ot he r
modules are in s talled o r r e moved. H oweve r, wh en you move a module to a diffe rent slo t , th e fir s t
number i n th e i nt er face address ch an g es to reflect t he new mo du le s lo t num b er.

Note Interface ports are numbered from left to right starting with 0.

The followin g s u bse cti on s d escribe th e in ter fa ce ad dr ess format s f or sp ecific plat for m s:

• Interface Addresses of Cisco 7200 Series Routers and Cisco uBR7200 Series Routers, page 1-27

Interfac e Addresses of Ci sc o7200 Series Routers and CiscouBR7200 Series
Routers

The interface address for a module installed in Cisco 7200 series routers or uBR7200 series routers is
compose d of a tw o-p a rt n u m b er in th e fo r mat slot/port-number.

In Cisco 7200 series routers, slots are numbered from the lower left to the upper right, beginning with
slot 1 and continuing through slot 2 for the Cisco 7202, slot 4 for the Cisco 7204, and slot 6 for the
Cisco 7206. (Slot 0 is reserved for the optional Fast Ethernet port on the I/O controller—if pr es en t .)

The interface addresses of a 4-port module installed in slot 1 would be 1/0 through 1/4 (slot 1 and
interface port 0 through port 4). If the 4-port module was installed in slot 4, these same interfaces would
be numbered 4/0 through 4/4 (slot 4 and interface port 0 through port 4).

In Cisco uB R7200 series routers, s lots are numbered slot 1 and slot 2 for the Cisco uBR7246. (Slot 0 is
always res erved f o r t h e Fas t E th er n et p o rt o n th e I /O controll er —if prese nt .) Th e i n dividu al in te rf ace s
always begin wi th 0. The numb er of addit ional interfaces depends on the number of interface ports on a
module.

The interface addresses of a module installed in slot 2 would be 2/0 and 2/1 (slot 2 and interface p orts 0
and 1). If a module is installed in slot 1, these s am e interf ace addresses would be 1/0 and 1/1 (slot 1 and
interface po r ts 0 and 1 ) .

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Identifyin g In te rfa ce A ddre sse s

CHAPTER

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2

Preparing to Install the PA-A2 ATM CES
Port Adapter

This chapter describes the general equipment, safety, and site preparation requirements for installing
module s. This chap ter cont ain s t he f ol lowin g sections:

• Required Tools and Equipment, page 2-1

• Minimum Software and Hardware Requirements, page 2-1

• Checking Hardwa re and S of t wa r e Comp a t ib ility, page 2-2

• Safety G u id el in es , page 2-2

• Laser/LED Safety, page 2-5

• FCC Class A Compliance, page 2-6

• BABT Compliance, page 2-7

• CE Compliance, page 2-7

Required Tools and Equipment

You need the following tools and parts to install modules. If you need additional equipment, contact a
service representative for ordering information.

• PA-A2 ATM CES port adapter to be installed

• Specific cables for your module

• Number 1 Philli ps and a 3 /16-inch fla t- b la d e screwdr iver

• Numbe r 2 Phil li ps s cr ewdriver

• Your own electrostatic discharge (ESD)-prevention equipment or the disposable grounding wrist

strap included with all upgrade kits, field-replaceable units (FRUs), and spares

• Antistatic mat

• Antistatic container

Minimum Softwar e and Hardware Requirements

Table 2-1 li s ts t h e m i ni mu m C is co IOS so ft wa re r ele as e re qu ir ed t o use the PA-A2 ATM CE S

port adapter in supported router platforms.

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Chapter2 Preparing to Install the PA-A2 ATM CES PortA dapter

Checking Hardware and Software Compatibility

Checking Har dwa re and Software Compatibility

To check the minimum software requirements of Cisco IOS software with the hardware installed on your
router, Cisco maintains the Software Advisor tool on Cisco.com. This tool does not verify whether
modules w it hi n a sy s te m ar e compati bl e, but it d oes prov id e t h e m i ni mu m I O S r eq ui re m en ts fo r
individual hardware modules or components.

Note Access to this tool is limited to users with Cisco.com login accounts.

To access S o f tware A d vi sor, click Login at Cisco .co m an d g o to Technical Support Help—Cisco
TAC: Tool Index: Software Advisor. You can als o a ccess the t ool by po in t in g y o ur b r owse r di re ctl y

to http://www.cisc o. co m /c gi-bin/ s up p or t/ Co m p N av/I n dex .p l.
Choose a product family or enter a specific product number to search for the minimum supported

software release needed for your hardware.

Safety G u idelines

This se cti on provi d es s a fe ty guidelin es that you s h ou ld f o llow when wo r ki ng w ith any equipment that
connects to electrical power or telephone wiring.

Safety Warnings

Safety warnings appear throughout this publication in procedures that, if performed incorrectly, might
harm you . A war n in g sym bo l pr ec ed es ea ch wa r ni ng s t ate m en t.

Table 2-1 PA-A2 ATM CES Port Adapter Software Requirements

Router Platform Recommended M inim um Cisco IOS R elease

Cisco 7200 series routers

•

Cisco 7 2 04 VX R an d Ci sc o 7206VXR Cisco IOS R e le ase 12.0(2) X E2 o r a later re lea s e o f Cisco IO S R elease 12.0 X E

Cisco I OS R elease 12.0 ( 3)T o r a later r el ease of Cisc o IOS Rel ease 1 2. 0T

• Cisco 7202, Cisco 7204, and

Cisco 7206

Cisco I O S Release 11 .1 (14 ) CA o r a lat er r ele as e of C isc o IOS Rel eas e 1 1. 1 C C
Cisco I O S Release 11 .3 ( 4)A A o r a l ate r re lease of Ci s co IOS R ele as e 11 .3 A A

Cisco uBR7200 series routers

Cisco u B R7 2 46 Cisco I O S Release 12 .0 (3) T o r a lat er r el eas e of C isc o IOS Rel eas e 1 2. 0 T

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Safety Gu idelin e s

Warning

This warning symbol means danger. You are in a situation that could cause bodily injury. Before
you work on any equipment, be aware of the hazards involved with elect rical circuitry and be
familiar with standard practices for preventing accidents. To see translations of the warnings
that appear in this publication, refer to the Regulatory Compliance and Safety Information
document that accompanied this device.

Waarschuwing

Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk let sel
kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van
de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van standaard
maatregelen om ongelukken te voorkomen. Voor vertalingen van de waarschuwingen die in
deze publicatie verschijnen, kunt u het document Regulatory Compliance and Safety Information
(Informatie over naleving van veiligheids- en andere voorschriften) raadplegen dat bij dit
toestel is ingesloten.

Varoitus

Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan.
Ennen kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä
vaaroista ja tavanomaisista onnettomuuksien ehkäisykeinoista. Tässä julkaisussa esiintyvien
varoitusten käännökset löydät laitteen mukana olevasta Regulatory Compliance and Safety
Information -kirjasesta (määräysten noudattaminen ja tietoa turvallisuudesta).

Attention

Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant
causer des blessures ou des dommages corporels. A vant de travailler sur un équipement, soyez
conscient des dangers posés par les circuits électriques et familiarisez-vous avec l es
procédures couramment utilisées pour éviter les accidents. Pour prendre connaissance des
traductions d’avertissements figurant dans cette publication, consultez le document Regulatory
Compliance and Safety Information (Conformité aux règlements et consignes de sécurité) qui
accompagne cet appareil.

Warnung

Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu einer
Körperverletzung führen könnte. Bevor Sie mit der Arbeit an irgendeinem Gerät beginnen, seien
Sie sich der mit elektrischen Stromkreisen verbundenen Gefahren und der Standardpraktiken
zur Verm eidung von Unfällen bew ußt. Übersetzungen de r in dieser V eröffentlichung enthaltenen
Warnhinweise finden Sie im Dokument Regulatory Compliance and Safety Information
(Informationen zu behördlichen Vorschriften und Sicherheit), das zusammen mit diesem Gerät
geliefert wurde.

Avvertenza

Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle
persone. Prima di lavorare su qualsiasi apparecchiatura, occorre conoscere i pericoli relativi
ai circuiti elettrici ed essere al corrente delle pratiche standard per la prevenzione di incidenti.
La traduzione delle avvertenze riportate in questa pubblicazione si trova nel documento
Regulatory Compliance and Safety Information (Conformità alle norme e informazioni sulla
sicurezza) che accompagna questo dispositivo.

Advarsel

Dette varselsymbol et bety r fare. Du be finner deg i en si tuasjon som kan føre til personsk ade. Før
du utfører arbeid på utstyr, må du vare oppmerksom på de faremomentene som elektriske kretser
innebærer, samt gjøre deg kjent med vanlig praksis når det gjelder å unngå ulykker. Hvis du vil
se oversettelser av de advarslene som finnes i denne publikasjonen, kan du se i dokumentet
Regulatory Compliance and Safety Information (Overholdelse av forskrifter og
sikkerhetsinformasjon) som ble levert med denne enheten.

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Safety Guidelines

Electric al Equipment Guidelines

Follow these basic guidelines when working with any electrical equipment:

• Before b egi nnin g any p r oc ed ur es requirin g access to th e cha s sis in ter io r, locat e the em ergency

power-off switch for the room in which you are working.

• Disconne ct all power an d ex te rn al cab l es b ef ore moving a c ha s sis.

• Do not work alone w he n po tentia lly h a z a r do u s conditions exi st.

• Never assum e t hat p owe r ha s be en d isco n nected fro m a circuit; alw ays ch eck .

• Do not perform any action that creates a potential hazard to people or makes the equipment unsafe;

carefully examine your work area for possible hazards such as moist floors, ungrounded power
extension cables, and missing safety grounds.

Telephone Wiring Guidel i nes

Use the f ol low in g guidel in es w h en w or k in g with any equipment th at is co nn ec ted to tel e p ho n e w i ri ng
or to othe r ne twor k cab lin g:

• Never install telephone wiring during a lightning storm.

• Never instal l teleph o ne ja cks in wet locations unl e ss t h e j ack is specifi cal ly d e si gn ed for wet

location s .

• Never touch uninsulated telephone wires or terminals unless the telephone line has been

disconnected at the network interface.

• Use caution when installing or modifying telephone lines.

Aviso

Este símbolo de aviso indica perigo. Encontra-se numa situação que lhe poderá causar danos
físicos. Antes de começar a trabalhar c om qualquer equipamento, fami liarize-se com os perigos
relacionados com circuitos eléctricos, e com quaisquer práticas comuns que possam prevenir
possíveis acidentes. Para ver as traduções dos avisos que constam desta publicação, consulte
o documento Regulatory Compliance and Safety Information (Informação de Segurança e
Disposições Reguladoras) que acompanha este dispositivo.

¡Advertencia!

Este símbolo de aviso significa peligro. Existe riesgo para su int egridad fís ica. Antes de
manipular cualquier equipo, considerar los riesgos que entraña la corriente eléctrica y
familiarizarse con los procedimientos estándar de prevención de accidentes. Para ver una
traducción de las advertencias que aparecen en esta publicación, consultar el documento
titulado Regulatory Compliance and Safety Information (Información sobre seguridad y
conformidad con las disposiciones reglamentarias) que se acompaña con este dispositivo.

Varning!

Denna varningssymbol signalerar fara. Du befinner dig i en situation som kan leda t ill
personskada. Innan du utför arbete på någon utrustning m åste du vara medveten om faro rna med
elkretsar och känna till vanligt förfarande för att förebygga skador. Se förklaringar av de
varningar som förkommer i denna publikation i dokumentet Regulatory Compliance and Safety
Information (Efterrättelse av f öreskrifter och s äkerhetsinformation), vilket medföljer denna
anordning.

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Laser/LED Safety

Preventi ng Electrostat i c Discharge Damage

Electrostatic discharge (ESD) damage, which can occur when electronic cards or components are
improper l y h an d led , re s ults i n co mplete or in te rmittent f ai lu re s. P o rt ad ap te r s an d pro ces so r m o d ul es
comprise printed circuit boards that are fixed in metal carriers. Electromagnetic interference (EMI)
shielding and connectors are integral components of the carrier. Although the metal carrier helps to
prote ct the b oa rd from ESD , us e a preven tive antistatic s t r a p du ring handli ng .

Following are gu id el in es f o r pr eventin g ES D d amage:

• Always use an ESD w r ist o r an kl e st ra p an d e nsu re t ha t i t m ake s g oo d ski n co ntact .

• Connect the equipment end of the strap to an unfinished chassis surface.

• When in sta lling a co mp o nen t , u s e a ny availab le eje ctor levers or cap tive i n s tal lat io n scr ews t o

properly seat t he bus connect o rs i n th e b ackplane o r mid p lan e. Th ese devices prevent acc id en tal
removal, provid e proper gr o un din g f o r th e sy s t em, and hel p to en su re th at bu s co nnectors ar e
properly seat ed .

• When removing a component, use any available ejector levers or captive installation screws to

release t h e bus co nnectors f rom t he b ack p lan e or m i dp l an e.

• Handle carriers by available handles or edges only; avoid touching the printed circuit boards or

connecto rs .

• Place a removed board component-side-up on an antistatic surface or in a static shielding container.

If you pl an to r et ur n th e co m pon en t t o the fact ory, imme di ate ly p lac e i t i n a s t ati c s h i eld in g
container.

• Avoid contact between the printed circuit boards and clothing. The wrist strap only protects

componen ts from ESD volt ag es o n th e body; ES D voltages on clo t hi ng c an s ti ll cau se damage.

• Never atte mp t t o remove t h e p ri n ted ci r cu it board f rom t he metal ca rr ie r.

Caution For safet y, periodi cal ly ch eck the r esistance value of the an ti stat ic strap. The me asu re m en t sh o ul d be

between 1 and 10 megohms (Mohms).

Laser/LED Safety

The sing le- mo d e tran s m it te r in th e m o d ul e uses a smal l la s er to tr ans m it the lig h t s ig n al t o th e n etwork
ring. Keep t he tr an s mit p or t cove re d wh en ever a cable is n ot co n ne cted to it . A l th ou g h m ulti m o de
transceivers typically use LEDs for transmission, it is good practice to keep open ports covered and
avoid staring into open ports or apertures. The single-mode aperture port cont ains a laser warning label,
as show n in Figure 2-1.

Figure 2-1 Laser Warning Labels for Single-Mode Port

PRODUIT LASER DE CLASSE 1

CLASS 1 LASER PRODUCT

LASERPRODUKT DER KLASSE 1

PRODUCTO LASER CLASE 1

1

H6655

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FCC Class A Complia nce

Warning

Invisible laser radiation may be emitted from the aperture ports of the single-mode products when no
fiber cable is connected. Avoid exposure and do not stare into open apertures.

Warning

Class 1 laser product.

The multimode ape r tu re co nt ai ns a C lass 1 LED w ar n in g lab el , as shown in Fi gure 2-2.

Figure 2-2 Class 1 LED Wa rning Label for Multimode Port

Warning

Because invisible laser radiation may be emitted form the aperture of the port when no fiber cable is
connected, avoid exposure to radiation and do not stare into open apertures.

Warning

Class 1 LED product.

FCC Class A Compliance

This equi pment ha s been tested a nd foun d to comp ly with th e limi ts for a Cl ass A digital devi ce, pursu ant
to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful
interferen ce when th e e qu ip ment is oper at ed in a commer c ial enviro nment. Thi s eq u ip men t ge nerates,
uses, and can radiate radio-frequency energy and, if not installed and used in accordance with the
instructi on manual, may ca use harmfu l in terference to rad io co mmunications. Op er at io n o f t h is
equipm en t i n a resi de nt ial area is li kely to cau se ha rmful in ter f er en ce, in wh ich case us e rs will b e
required to correct the interference at their own expense.

You can deter mi ne wh et h er yo ur eq u ip men t i s cau si ng in terference by t ur n in g i t off. If th e in t e rfe re nc e
stops, it was probably caused by the Cisco equipment or one of its peripheral devices. If the equipment
causes interference to radio or television reception, try to correct the interference by using one or more
of the f ollowing mea sur e s:

• Turn the television or radio antenna until the interference stops.

• Move the equipment to one side or the other of the television or radio.

• Move the equipment farther away from the television or radio.

• Plug the equipment into an outlet that is on a different circuit from the television or radio. (That is,

make certain the equipment and the television or radio are on circuits controlled by different circuit
breakers or fuses.)

Warning

This product has been designed to meet these requirements. Modifications to this produ ct that are not
authorized by Cisco Systems, Inc. could void the various approvals and negate your authority to
operate the product.

11773

CLASS 1 LED PRODUCT

PRODUKT MIT KLASSE 1 LED

PRODUIT AVEC VOYANT DEL

DE CLASSE 1

PRODUCTO LED DE LA CLASE 1

LED

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BABT Compliance

BABT Compliance

The BABT607116 marking on the module signifie s that it meets United Kingdom directive 607116 and
has been des i gn ed to BABT st an da rd s. Th e BAB T label is lo cated on th e t op of th e m o d ul e; Figure 2-3
shows the BABT la be l f or the module.

Figure 2-3 BABT Label

CE Complian ce

The CE0168 marking on the ATM CES port adapter signifies that the port adapter’s 120-ohm E1 ports
meet United Kingdom directive 0168 and has been designed to CE standards, which complies with the
CTR12 and TBR13 specifications. The CE label is located on the top of the ATM CES port adapter;

Figure 2-4 shows the CE label for the 120-ohm E1 ports of the ATM CES port adapter.

Figure 2-4 CE Label for PA-A2 ATM CES Port Adapt er 120-Ohm Ports

Modifications to this product not authorized by Cisco Systems, Inc. could void the compliance approvals
and negate your authority to operate the product.

H10017

607116

CE0168X

h10037

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CE Compliance

CHAPTER

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3

Removing and Installing the PA-A2 ATM CES
Port Adatper

This chapter describes how to remove PA-A2 ATM CES port adapters from supported platforms and
also how to i nst all n ew o r repl acement mo du le s . Th is ch ap ter contains t he following sections:

• Handling Port Adapters, page 3-1

• Online Insertion and Removal, page 3-2

• Warnings and Cautions, page 3-3

• Port Adapter Slot Divider, page 3-3

• Port Adapt er Removal a n d Installation , page 3- 6

Each PA-A2 ATM CE S p or t ad ap ter circuit board is moun te d to a m eta l carrier an d is s en s itive t o
electrostatic discharge (ESD) damage. Before you begin installation, read Chapter 2, “Preparing to

Install the <XXXXX Module>,” for a list of parts and tools required for installation.

Note When a slot is no t in u s e, a b lank mus t fill th e em p ty s l ot to allow the ro u ter or sw it ch to conform to

electromag n et ic interfer en ce (EMI) emission s r eq ui r emen t s an d to al low p ro p er ai rflow ac ro ss the
installed modules. If you plan to install a new module in a slot that is not in use, you must first remove
the blank.

Caution When powering off the router, wait a minimum of 30 seconds before powering it on again.

Handling Port Adapters

Warning

Always handle the port adapter by the carrier edges and handle; never touch the port adapter
components or connector pins. (See Figure 3-1 .)

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Online Insertion and Removal

Figure 3-1 Handling a Port Adapter

Online Insertion and Removal

The C is c o 720 0 series r o uters, C i sco 7200 VXR router, and Cisco uBR 72 46 router su pport t he OIR of
all module types. Therefore, you do not have to power down routers when removing and replacing
modules in these chassis.

It is wise to gra cefu ll y s h u t dow n th e system b ef ore removin g a p ort ad ap ter that has active traffic
moving through it. Removing a module while traffic is flowing through the ports can cause system
disruption. Once the module is inserted, the ports can be brought back up.

Note As you disengage the module from the router or switch, online insertion and removal (OIR)

administ r atively shuts d ow n a ll active inte rfaces in t he m o du le.

OIR allows you to install and replace modules while the router is operating; you do not need to notify
the soft ware or sh ut d own t he syst em po w er , alt hou gh you s houl d not run traf fic throu gh t he mo dule you
are removi ng w h il e i t i s b ein g r emove d. O IR i s a metho d th at is se am l es s t o en d u s ers o n th e ne tw or k ,
maintains all routing information, and preserves sessions.

The following is a functional description of OIR for background information only; for specific
procedures for installing and replacing a module in a supported platform, refer to the “Port Adapter

Removal and In sta llati on” section on page 3-6.

Each modul e ha s a bus conn ect or th at co n ne cts it to the rout er. The conne cto r has a set of tiered pi ns in
three lengths that send specific signals to the system as they make contact with the module. The system
assesse s the signals it rece ives and the order in which it receives them to determine if a module is being
removed from or in trod u ced t o t h e s y ste m . Fr o m th es e s i gn al s, th e system de ter m i ne s w h eth er t o
reinitial iz e a new in te rface or to shu t down a disconn ect ed in terface.

Specifically, when you insert a module, the longest pins make contact with the module first, and the
shortest pins make contact last. The system recognizes the signals and the sequence in which it receives
them.

When you remove or insert a module, the pins send signals to notify the system of changes. The router
then perfoms the following procedure:

1. Rapidly scan s t he s y stem for c onfig urat io n ch an ge s .

2. Initializes n ewl y in ser ted p o rt ad ap te rs or admi n istr at ively sh ut s d own any vaca nt i nt er fac es.

3. Brings all p r evio usly confi gu r ed in terfaces o n the modul e b ac k to thei r pr evio u s ly in stalled s ta te.

Any newly in s erted i nt er fac e i s p ut in th e ad m in ist ra tively sh u td own s ta te, as i f it wa s pr esent (but
not configured) at bo ot t ime . I f a simi la r m odu le ty pe i s r ei nse rte d into a sl ot , i ts po rts are c onf i gur ed
and brought online up to the port count of the originally installed module of that type.

H6420

Metal carrier

Printed circuit board

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Warnings and Cautions

Warnings and Cautions

Observe the following warnings and cautions when installing or removing modules:

• Do not slide a module all the way into the slot until you have connected all required cables. Trying

to do so disrupts normal operation of the router or switch.

• If a module lever or other retaining mechanism does not move to the locked position, the module is

not completely seated in the midplane. Carefully pull the module halfway out of the slot, reinsert it,
and move the module lever or other mechanism to the locked position.

• To prevent jamming the carrier between the upper and the lower edges of the module slot, and to

ensure that the edge connector at the rear of the module mates with the connection at the rear of the
module s lo t, m a ke certain that th e carrier is posi tio n e d co r re ctly, as shown in t he cutaway in th e
following illustrations.

Warning

When performing the following proc edures, wear a grounding wrist strap to avoid ESD damage to the
card. Some platforms have an ESD connector for attaching the wrist strap. Do not directly touch the
midplane or backplane with your hand or any metal tool, or you could shock yourself.

Port Adapt er Slot Divi der

If you are replacing two single-width modules with a dual-width module, you first need to remove the
slot divider. The following sections describe how to remove the sl o t d ivider:

• Cisco 7200 Series Routers—Removing the Slot Divider, page 3-4

• Cisco uBR7200 Series Routers—Removing the Slot Divider, page 3-5

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Port Adapter Slot Divider

Cisco7200 Series Routers—Removing the Slot Divider

To ins tall a dual-width module in Cisco 7200 series routers or in Cisco 7200 VXR route rs that have two
single-width modules installed, first remove the slot divider. Follow this procedure:

2

4

6

1

3

5

Slot divider lever

0

MII

EN

RJ45
EN

RJ45
LINK

1O PWR

OK

RJ-45

CPU RESET

FAST ETHERNET INPUT/OUTPUT CONTROLLER

ENABLED

PCMCIA

EJECT

SLOT 0

SLOT 1

FE MII

vX

7200 Series

VXR

Step 1

Remove installed single-width port adapters from the slots on
both sides of the port adapter slot divider.

Step 2

With one hand, raise the slot divider lever to unlock the slot
divider from the chassis.

Step 3

With the slot divider lever still raised, use your other hand to
pull the slot divider from the chassis.

26519

2

4

6

1

3

5

0

MII

EN

RJ45

EN

RJ45

LINK

1O PWR

OK

RJ-45

CPU RESET

FAST ETHERNET INPUT/OUTPUT CONTROLLER

ENABLED

PCMCIA

EJECT

SLOT 0

SLOT 1

FE MII

Cisco

7200 Series

VXR

Step 4

Store the slot divider in a location where you can retrieve it for
use later.

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Port Adapter Slot Divider

CiscouBR7200 Series Rout ers—Removing the Slot Divi der

If you are instal ling a dual - width module in a Cisco uBR7200 rou ter that has two single-width modules
installe d, you m u s t fir st r e mo ve the slo t d ivi der that is loc ated be tw een the tw o slots. Follow this
procedure:

Step 1 Remov e install ed single-w idth port ad apters from the slots on both sides of the port adapter slot divider.
Step 2 With one hand, raise the slot divider lever to unlock the slot divider from the chassis.

(See Figure 3-2.)

Figure 3-2 Slot Divider Lev er—Cisco uBR7246 Shown

Step 3

With the slot divider lever still raised, use your other hand to pull the slot divider from the chassis.
(See Figure 3-3.)

Figure 3-3 Removing the Slot Divider from the Chassis—Cisco uBR7246 Shown

Step 4

Store the slot divider in a location where you can retrieve it for use later.

14297

Slot divider lever

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Port Adapter Re mov a l and Ins ta lla tio n

Port Adapter Removal and Installation

In this section, the illustrations that follow give step-by-step instructions on how to remove and install
modules. Although the procedures may refer to a particular type of module, the steps are the same for
installi ng and r e moving all types of m od ules. Th is s ect io n contains the f ol low in g illus tr ati on s :

• Cisco 7200 Series Ro uters a nd Cisco 7200 VXR Router s—Removing a nd Installing a Module , pag e

3-7

• Cisco uBR7200 Series Routers—Removing a Module, page 3-8

• Cisco uBR7200 Series Routers—Installing a Module, page 3-9

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Port Ada p te r Re mo v a l a n d In stallat io n

Cisco7200 Series Routers and Ci sco7200 VXR Routers—Rem oving
and Installing a Module

Step 1

To remove the port adapter, place
the port adapter lever in the
unlocked position. (See A.) The
port adapter lever remains in the
unlocked position.

Step 2

Grasp the handle of the port adapter
and pull the port adapter from the
router, about halfway out of its slot.
If you are removing a blank port
adapter, pull the blank port adapter
completely out of the chassis slot.

Step 3

With the port adapter halfway out of
the slot, disconnect all cables from
the port adapter. After disconnecting
the cables, pull the port adapter
from its chassis slot.

Step 4

To insert the port adapter, carefully
align the port adapter carrier
between the upper and the lower
edges of the port adapter slot.
(See B.)

Step 5

Carefully slide the new port adapter
halfway into the port adapter slot.
(See B.)

Step 6

With the port adapter halfway into
the slot, connect all required cables
to the port adapter. After connecting
all required cables, carefully slide
the port adapter all the way into the
slot until the port adapter is seated
in the router midplane.

Step 7

After the port adapter is properly
seated, lock the port adapter lever.
(See A.)

27996

2

0

4

1

3

5

6

FAST SERIAL

EN

TD

TC

RD

RC

LB

CD

TD

TC

RD

RC

LB

CD

TD

TC

RD

RC

LB

CD

TD

TC

RD

RC

LB

CD

TOKEN RING

0

1

2

3

Cisco 7200

Series

CPU RESET

ENABLED

MII

EN

RJ45

EN

RJ45

LINK

1O PWR

OK

RJ-45

FAST ETHERNET INPUT/OUTPUT CONTROLLER

PCMCIA

EJECT

SLOT 0

SLOT 1

FE MII

ENABLED

MII

LINK

RJ45

FAST ETHERNET

0

ETHERNET 10BT

ENABLED

0

2

1

3

LINK

0

1

2

3

Port adapter lever

(locked position)

Port adapter lever

(unlocked position)

Note: This adapter
removal applies to any
port or service adapter.

A

B

MII

EN

RJ45
EN

RJ45
LINK

1O PWR

OK

RJ-45

CPU RESET

FAST ETHERNET INPUT/OUTPUT CONTROLLER

ENABLED

PCMCIA

EJECT

SLOT 0

SLOT 1

FE MII

2

4

6

Cisco 7200

Series

1

3

5

ETHERNET 10BT

ENABLED

0

2

1

3

LINK

0

1

2

3

ENABLED

MII

LINK

RJ45

FAST ETHERNET

0

TOKEN RING

0

1

2

3

Slot
guide

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Port Adapter Re mov a l and Ins ta lla tio n

Cisco uBR7200 Seri e s Routers—R emovi ng a Module

Port adapter lever
(locked position)

Port adapters

Port adapter lever
(unlocked position)

Port adapter
retention clip
(locked position)

Port adapters

Port adapter
retention clip
(unlocked position)

Step 1

To remove the port adapter,
unlock the port adapter
retaining mechanism. The port
adapter lever remains in the
unlocked position.

Place the port adapter lever
(Cisco uBR7223, see A), or
the port adapter retention clip
(Cisco uBR7246 and Cisco
uBR7246 VXR, see B) in the
unlocked position. Either
mechanism remains in the
unlocked position.

Step 2

Grasp the handle of the port
adapter and pull the port
adapter from the router, about
halfway out of its slot.
If you are removing a blank
port adapter, pull the blank
port adapter completely out of
the chassis slot.

Step 3

With the port adapter halfway
out of the slot, disconnect all
cables from the port adapter.
After disconnecting the cables,
pull the port adapter from its
chassis slot.

26523

Note: This adapter
removal applies to any
port or service adapter.

A

B

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Port Ada p te r Re mo v a l a n d In stallat io n

Cisco uBR7200 Series Routers—Installing a Module

Step 1

To insert the port adapter, carefully
align the port adapter carrier
between the upper and the lower
edges of the port adapter slot.

Step 2

Carefully slide the new port adapter
halfway into the port adapter slot.

Step 3

With the port adapter halfway into
the slot, connect all required cables
to the port adapter. After connecting
all required cables, carefully slide
the port adapter all the way into the
slot until the port adapter is seated in
the router midplane.

Step 4

After the port adapter is properly
seated, lock the port adapter lever or
retention clip, depending on your
system. (See illustration on
preceding page.)

26524

Inside

slot guide

Metal carrier

PC board

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Port Adapter Re mov a l and Ins ta lla tio n

CHAPTER

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4

Configuring the PA-A2 ATM CES Port Adapter

To contin ue y ou r p ort ad apt er i nst allation, yo u mu st configure th e ATM interfaces.
The instru ct io n s th at follow ap pl y to al l supported platfo rms. Mino r di fferen ce s b etw e en th e

platforms —with Cisco IOS software comma nds—are not ed.
This chapter co n tai ns the fo llowing sections:

• Using th e EXEC Command Inter p re ter, p ag e 4 - 1

• PA-A2 ATM CES Configurations, page 4-2

• Customizing the PA-A2 ATM CES Port Adapter, page 4-14

• Checking the Configuration, page 4-15

• Traffic Management, page 4-20

• Troubleshooting the PA-A2 ATM CES Port Adapter Installation and Configuration, page 4-21

• ATM Co nfi gu ration , page 4- 2 4

• Upgrading Your Boot Flash Image, page 4-25

• Port Adapter Error Messages, page 4-26

Using the EXEC Command Interpreter

You modify the conf igur at ion o f yo ur ro ut er th rou gh the soft wa re c omman d inte rp rete r ca lled th e EXEC
(also ca ll ed en ab le m o de ) . You must enter th e privileged l evel o f th e EXEC co mm an d interpr et er w ith
the enable command before you can use the configure command to configure a new interface or change
the existing configuration of an interface. The system prompts you for a password if one has been set.

The system prompt for the privileged level ends with a pound sign (#) instead of an angle bracket (>).
At the co n sol e t er m in al , u se t h e f ol low in g pro ced u re to e nt er th e privileged l evel:

Step 1 At the user-level EXEC prompt, enter the enable command. The EXEC prompts you for a

privileged-level passwo r d a s f ollows:

Router> enable

Password:

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Chapter4 Configuring the PA-A2 ATM CES PortAdapter

PA-A2 ATM CES Con f ig ur a tions

Step 2 Enter th e passw ord (t he passw ord is c ase se nsiti ve ). For secur ity purpo ses, t he passw ord is not dis playe d.

When you en ter the c or rect passw ord , th e s yst em di spl ay s th e privil ege d- level syst em pr o mpt ( #):

Router#

PA-A2 ATM CES Configurat io ns

After you verify that the new port adapter i s in s t all ed co r rectly (the ENA BL ED LED goes on ), u s e t he
privileged-level configure command to configure the new i nt er fac es. Have the f o llow in g in f or mation
available:

• Protocols you plan to route on each new interface

• IP addresses, if you plan to configure the interfaces for IP routing

• Bridging protocols you plan to use

If you installed a new port adapter or if you want to change the configuration of an existing interface,
you mus t en ter c on figur at io n m o de to c on figur e th e n ew i n ter fa ces. If you re pl aced a port adapter t h at
was previously configured, the system recognizes the new interfaces and brings each of them up in their
existing configuration.

For a summary of the configuration options available and instructions for configuring interfaces on a
port adapte r, refer to the ap propr iate co nfigurati on pu blica tions listed in the “Rela ted D o cu me n ta tio n ”

section on page viii.

When an i n te r face i s en ab led ( taken out o f s hut dow n mod e) wi th no addi tio n al arguments, t h e d efa ul t
interface co nfigu r ati on fi le pa ra me t er s ar e fu n cti on al .

You execute configu r ati on c ommands fro m t he privileged level o f th e EXEC co mm a nd i nt er pret er,
which u sua lly r eq u ir es p ass w o rd access. C on ta ct your s yst em administra to r, if ne ces sary, to obtain
password acc es s. ( S ee th e “Using th e EXEC Co mmand I n ter p r ete r” section on page 4-1 for an
explanation of the privileged level of the EXEC.)

This section contains the following configuration subsections for the standard configuration tasks:

• Shutting Down an Interface, page 4-3

• Performing a Basic Interface Configuration, page 4-4

• Configuring the PA-A2 ATM CES Port Adapter for T3, page 4-5

• Configuring the PA-A2 ATM CES Port Adapter for E3, page 4-5

• Configuring the PA-A2 ATM CES Port Adapter for OC-3, page 4-6

• Configuring VCs, page 4-6

• Configuring PVCs, page 4-7

• Configuring SVCs, page 4-9

• Configuring Classical IP and ARP over ATM, page 4-13

• Classe s of S ervice and Transm it P r io r ity o n the PA-A2 ATM CES Port Adapter, page 4- 1 3

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Shutting Down an Interface

Before y o u rem ove a n in terfa ce that yo u w il l no t r ep la ce, replac e i nt erfac e cables, or r ep la ce po r t
adapters, use the shutdown co mm an d to sh u t d own (d is ab l e) th e i n ter fa ces to prevent an o malies whe n
you reinstall the new port adapter or reconfigured port adapter. When you shut down a n interface, it is
designated administratively down in the show command displays.

Follow these s t ep s to sh u t d ow n a n in ter fa ce:

Step 1 Enter the privileged level of the EXEC command interpreter (also called enable mode). (See the “Using

the EX EC Command I nterpre te r” section on page 4-1 for instructions.)

Step 2 At the privileged-level prompt, enter configuration mode and specify that the console terminal is the

source of the con figur atio n sub com ma nds , as fol lows :

Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#

Step 3 Shut down interfaces by en te r i ng the in t erface co mm a nd ( fol lowe d by th e i nt er face type an d t h e

interface ad dr ess of t he in te rf ace ), an d th en en ter the shutdown command. See “Using the show

interface s Co mmand” section on page 4-17 for the command syntax.

When you have finished, press Ctrl-Z—hold down the Control key while you press Z—or enter end or
exit to exit configuration mode and return to the EXEC command interpreter.

Note If you n eed t o shu t dow n ad ditional in te rfaces, ent er the in terf a ce command (followed by the

interface type an d th e in terface add re s s o f th e i nt erfac e) f or each of th e i nter fa ces o n y ou r p ort
adapter. Use the no shutdown command t o en ab le the int erfac e.

Step 4 Write the new confi gurati on to NVR AM as follows:

Router# copy running-config startup-config
[OK]
Router#

The system displays an OK message when the configuration has been stored in NVRAM.

Step 5 Verify that new in terfaces are now in the cor re ct s ta te ( s hu t d own ) us in g th e show interfaces command

(followed by t he interf ace ty p e a nd t he in terface ad dr ess of t he interf ace ) to d is p lay t he s p eci fic
interface . Th e “Using th e s h ow in terfaces Comman d” section on page 4-17 provides examples.

Step 6 Reen able in terfaces by doin g the foll owing:

a. Re peat Step 3 to re en abl e an inter fa ce. S u bst itu t e t he no shutdown command for the shutdown

command.

b. Re peat Step 4 to wr i te t h e n ew c on fig urat io n to m e m o ry.

Use the copy running-config startup-config command.

c. Repeat Step 5 to verify that the interfaces are in the correct state. Use the show interfaces command

followed by th e i nt erfac e t yp e and inter fa ce a dd r ess o f th e in ter fa ce.

For complete descriptions of software configuration commands, refer to the publications listed in the

“Rela ted D o cu mentation ” section on page viii.

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Performing a Ba si c Interface Configura t i on

Following are instructions for a basic configuration, which includes enabling an interface and specifying
IP routing. You might also need to enter other configuration subcommands, depending on the
requirements for your system configuration and the protocols you plan to route on the interface. For
complete descriptions of configuration subcommands and the configuration options available for the
interfaces of your port adapter, refer to the appropriate software documentation.

In the following procedu re, pr es s t he Return key aft er e a c h s te p unle ss o therwis e note d. At any ti m e
you can exit the privileged level and return to the user level by entering disable at the prom pt as follo ws :

Router# disable

Router>

Step 1 Enter configuration mode and specify that the console terminal is the source of the configuration

subcommands, as follows:

Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#

Step 2 Specify th e first interface to configu r e by enterin g t h e interface comman d, followe d by the type of

interface an d th e i nt er fac e a dd r ess o f th e i n ter fa ce y o u pl an to c on figu re . ( Th e c ommand fo r y our po r t
adapter will be specific to the technology of your interface.) The “Using the show interfaces Command”

section on page 4-17 pr ov id es ex am p le s.

Step 3 Assign an IP address and subnet mask to the interface (if IP routing is enabled on the system) by using

the ip address subcommand, as i n th e f o ll owing exa m p le:

Router(config-if)# ip address 10.0.0.0 10.255.255.255

Step 4 Add any additional configuration subcommands required to enable routing protocols and set the

interface ch ar act er ist ics .

Step 5 Reenable the int er fac es u sing the no shutdown com mand . (See the “Shutting Down an Interface”

section on page 4-3.)

Step 6 After including all of the configuration subcommands to complete your configuration, press

Ctrl-Z—hold down the Control key while you press Z—or enter end or exit to exit configuration mode
and return to th e EXEC co mm an d in terpret er pr o m p t.

Step 7 Write the new confi gurati on to NVR AM as follows:

Router# copy running-config startup-config
[OK]
Router#

The system displays an OK message when the configuration has been stored in NVRAM.

Note If you ar e g o in g t o di sco n ne ct o r r eco n fig ure the ATM interface ca bl e, u s e th e shutdown command

before doing so. After reattaching the ATM interface cable, use the no shutdown command to bring up
the ATM interface.

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Configuring the PA-A2 ATM CES Port Adapter fo r T3

To configure the PA-A2 ATM CES port adapter for T3, perform the following tasks in interface
configuration mode:

Step 1 Specify an ATM interface to c on fig ure. For the ap pr o pr ia te in ter fa ce ad dr ess to u s e fo r y o ur sy s t em,

refe r to the “Identifying Interface Addresses” section on page 1-15.

Router# interface atm slot/port or slot/port-adapter/port

Step 2 Set the line buil d- o ut length (0 to 5 0 f eet is short and g r eat er th an 5 0 f eet is long). Use the no for m of

this co m ma n d to r et ur n to the default, w h ic h is short.

Router(config-if)# lbo {short | long}

Step 3 Select the transmit clock source. This can be internal or derived from the receive clock through use of

the no form of the command. By d efa ul t, th e r eceive clock sou r ce is u sed f or the tran sm i t c lo ck .

Router(config-if)# clock internal

Step 4 Enable D S-3 scrambling . U s e th e no form of the command to restore the default value.

Router (config-if)# DS3-scramble

Step 5 Specify DS-3 framing: m23plcp, cbitplcp, m23adm, or cbitadm. Use the no form of the com man d to

return t o th e d ef au lt, which i s cbi ta dm .

Router(config-if)# framing {m23plcp | cbitplcp | m23adm | cbitadm}

Configuring the PA-A2 ATM CES Port Adapter fo r E3

To configure the PA-A2 ATM CES port adapter for E3, perform the following tasks in interface
configuration mode:

Step 1 Specify an ATM interface to c on fig ure. For the ap pr o pr ia te in ter fa ce ad dr ess to u s e fo r y o ur sy s t em,

refe r to the “Identifying Interface Addresses” section on page 1-15.

Router# interface atm slot/port or slot/port-adapter/port

Step 2 Select the transmit clock source. This can be internal or derived from the receive clock through use of

the no form of this command. By default, the source is used for the transmit clock.

Router (config-if)# clock internal

Step 3 Enable E3 scrambling. Us e the no form of th e co m ma n d to r est or e th e d e fa ult value.

Router (config-if)# e3-scramble

Step 4 Specify DS-3 framing: g832adm, g751adm, or g751plcp. Use the no form of the comman d to return to

the defau lt, which i s g832adm.

Router(config-if)# framing {g832adm | g751adm | g751plcp}

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Configuring the PA-A2 ATM CES Port Adapter for OC-3

To configure the PA-A2 ATM CES port adapter for OC-3, perform the following tasks in interface
configuration mode:

Step 1 Specify an ATM interface to c on fig ure. For the ap pr o pr ia te in ter fa ce ad dr ess to u s e fo r y o ur sy s t em,

refe r to the “Identifying Interface Addresses” se c tion o n page 1- 15.

Router# interface atm slot/port or slot/port-adapter/port

Step 2 Select the transmit clock source. This can be internal or derived from the receive clock through use of

the no form of this command. By default, the source is used for the transmit clock.

Router (config-if)# clock internal

Step 3 Specify S ON ET fr aming by usi ng th e sonet stm-1 command. Use the no form of th is c omma nd t o r etur n

to the default, s t s -3c fr aming.

Router (config-if)# sonet stm-1

Note In ATM environm en ts , th e key d iffere nc e b et w een S O N ET and SD H framing m o des is t h e t yp e o f ce ll

transmi tted when n o u s er o r d at a cells a re availab le . T he ATM forum spe c ifies u s e o f id l e ce lls if
unassigned cells are not generated. More specifically, in Synchronous Transport Module-X (STM-X)
mode, an ATM interface sends idle cells for cell-rate decoupling. In Synchronous Transport Signal-Xc
(STS-Xc) mode, the ATM interface sends unassigned cells for cell-rate decoupling.

Configuring VCs

A virtual circuit (VC) is a point-to-point connection between remote hosts and routers. A VC is
established for each ATM end node with which the router communicat es. The characteristi cs of the VC
are estab l ish ed w he n th e V C is creat ed and in cl ud e th e f o llow ing :

• Class of service category:

–

Constan t bi t r ate (CBR)

–

Variable bit rate non-real-time (VBR-nrt)

–

Va riable bit rate real-time (VBR-rt)

–

Availabl e b it r ate (ABR )

–

Unsp ec ified bit r a t e ( U BR)

• ATM adaptation layer 5 (AAL5)

• Encapsulation type:

–

Logical link control Subnetwork Address Protocol (AAL5SNAP)

–

Multiplexer (AAL5MUX)

–

Network Layer Protocol ID (AAL5NLPID)

–

Integrated Local Management Interface (ILMI)

–

Switched Multimegab it D ata Serv ice (SM DS)

–

ITU/Q.2931 Signaling ATM Adaptation Layer (QSAAL)

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–

Cisco AUTO PPP over AAL5 (aal5autoppp)

–

Cisco PPP over AAL5 (aal5ciscoppp)

Note See the ATM virtual circuit con fig urat io n co m mands in th e ex am p le ou tp u t o f th e “Classes of Service

and Transmit Priority on the PA-A2 ATM CES Port Adapter” section on page 4-13.

Each VC supports the following router functions:

• Multiprotocol

• Fast switching of IP packets

• Flow, and Cis co Ex pr es s Fo rw a r di ng (CE F ) s w it c h in g of IP p a ckets

• Pseudobroadcast support for multicast packets

By default, CEF swi tch in g is enabled on all PA-A2 ATM CES interface s . Th ese s witching feat ur es can
be turned off with interface configuration commands. Flow must be explicitly enabled for each interface.

Configuring PVCs

To use a p er manent v irtu al circui t (P V C) , co nfigu r e t he P V C in bo t h t h e r out er an d th e ATM switch .
PVCs re m ai n a ctive u n ti l t he ci rc ui t i s r emove d from either configurat io n . W h en a P V C i s co n fig ured,
all of the configur at io n op ti on s ar e passed on to the PA-A2 ATM CES port adap ter. You ca n wri te th ese
PVCs in to n onvolatil e R A M ( NV R A M ); th ey ar e u sed w h en th e s yst em im a ge is re l o ad ed .

Some ATM switches might have point-to-multipoint PVCs that do the equivalent of broadcasting. If a
point-t o- multipoi n t P V C exi s ts , it can b e u sed as th e s ol e b r oadcast P V C f o r all m u lt ic as t re quests.

Like Frame Relay, ATM supports twp types of interface: point-to-point and multipoint. The one you
choose determine s w h eth er y o u need to u s e t he co nfigu r ati o n c ommands th at en sure IP to ATM
mappings.

To configure a PVC, re fer to the following section s:

• Configuring a PVC on a Point-to-Point Subinterface, page 4-7

• Configuring a PVC on a Multipoint Subinterface, page 4-8

Config uring a PVC on a Point- to-Point Subinterface

With point-to-point subinterfaces, each pair of routers has its own subnet. If you put the PVC on a
point-to-point subinterface, the router assumes that there is only one point-to-point PVC configured on
the subin te rface . Th er ef o re , an y IP p ac ket s w it h a d esti n ati on IP a dd r ess in the same subne t a re
forwarded on this VC.

To configure a point-to-point PV C, per fo r m t he fol lowi ng tasks fr om confi gu r a ti on mod e :

Step 1 Enter interface configuration mode and specify an ATM interface using the interface atm command.

Specify the creation of a point-to-point interface by using the point command.

Router(config)# interface atm5/0.200 point

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Step 2 You can list th e V PI an d V C I valu es u s in g th e pvc ? command .

Router(config-if)#pvc ?
<0-255> Enter VPI/VCI value(slash required)
<1-65535> Enter VCI value
WORD Optional handle to refer to this connection

Step 3 Create th e P V C . N o ti ce the ou tp ut te lling you that cir cu i t h as b ee n configured on a speci fic in ter fa ce.

Router(config-if)#pvc x/32
Configuring vc 1/1 on interface ATM5/0.200

Router(config-if-atm-vc)#

Note Static map statements are not required for point-to-point subinterfaces.

Configuring a PVC on a Multipoint Subinterface

Multipoint networks generally have three or more routers in the same subnet. If you put the PVC in a
point-to-multipoint subinterface or in the main interface (which is multipoint by default), you need to
either configure a static mapping or enable inverse Address Resolution Protocol (InARP) for dynamic
mapping.

The foll o w ing outp ut e xam ple shows a P VC 2/200 on ATM interf a ce 1 /1 /0.2 00. I t us es the gl obal de f ault
AAL5SNAP encapsulation. The local interface IP address is 2.2.2.1, and the remote interface IP address
is 2.2.2.2.

Router# show interfaces atm 1/1/0.200
interface ATM1/1/0.200 multipoint
ip address 2.2.2.1 255.255.255.0
no ip directed-broadcast
pvc 2/200
protocol ip 2.2.2.2 broadcast

InARP is enabled o n m u lti point li nk s by d efault. T h e f o llow in g example, cr eat es a m u ltipoint
subinte rf a ce. By usi ng the show atm map command, you can see that InARP builds a dynamic mapping
betwee n th e Lay er 3 IP addr ess and th e La yer 2 VP I/ VC I:

Router#show atm map
Map list ATM1/1/0.100_ATM_INARP : DYNAMIC
ip 1.1.1.2 maps to VC 19, VPI 2, VCI 100, ATM1/1/0.100
Map list ATM1/1/0.200_ATM_INARP : DYNAMIC
ip 2.2.2.2 maps to VC 20, VPI 2, VCI 200, ATM1/1/0.200

You can check the m a pp in g usin g the show atm map command . In th e foll owi ng example, you can s ee
the mapping of Layer 3 to Layer 2 addresses is dynamic. Such mapping is dynamic using inverse ARP
as illustrated in the previous show atm map command exampl e.

Router#show atm map
Map list ATM1/1/0.100_ATM_INARP : DYNAMIC
ip 1.1.1.2 maps to VC 19, VPI 2, VCI 100, ATM1/1/0.100
Map list ATM1/1/0.200pvc20 : PERMANENT
ip 2.2.2.2 maps to VC 20, VPI 2, VCI 200, ATM1/1/0.200, broadcast

You can use th e in arp command to change the frequency of transmitting a new ATM InARP packet in
order to reconfirm the mapping:

Router(config-subif)#pvc 2/200
Router(config-if-atm-vc)#inarp ?

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<1-60> InARP Frequency in minutes
<cr>
Router(config-if-atm-vc)#inarp 5
Router(config-if-atm-vc)#end

Use the show atm vc command to confirm your configured value:

Router#show atm vc
5d10h: ATMARP:Sending first PVC INARP
5d10h: ATMARP(ATM1/1/0.200)O: INARP_REQ to VCD#20 2/200 for link 7(IP)
5d10h: ATMARP(ATM1/1/0.200)I: INARP Reply VCD#20 2/200 from 2.2.2.2
ATM1/1/0.200: VCD: 20, VPI: 2, VCI: 200
UBR, PeakRate: 44209
AAL5-LLC/SNAP, etype:0x0, Flags: 0xC20, VCmode: 0x0
OAM frequency: 0 second(s)
InARP frequency: 5 minutes(s)
Transmit priority 4
InPkts: 10, OutPkts: 11, InBytes: 680, OutBytes: 708
InPRoc: 10, OutPRoc: 5, Broadcasts: 0
InFast: 0, OutFast: 0, InAS: 0, OutAS: 6
InPktDrops: 0, OutPktDrops: 0
CrcErrors: 0, SarTimeOuts: 0, OverSizedSDUs: 0
OAM cells received: 0
OAM cells sent: 0
Status: UP

Configuring SVCs

ATM switched virt ual circu its (SVCs) ar e c r eat ed an d re leased dyn amically, providin g u s er b a n dwid t h
on demand. This service requires a signaling protocol between the router and the switch.

The ATM signaling software provides a method of dynamically establishing, maintaining, and clearing
ATM connect io n s at th e U se r-Network In te rface (UNI) . The ATM sig na lin g s o ft ware conform s to t he
ATM Forum UNI 4.0 specification.

In UNI mode, the user is the router, and the network is an ATM switch. This is an important distinction.
The Cisco router does not perform ATM-level call routing. Instead, the ATM switch does the ATM call
routing, and the router routes packets through the resulting circuit. The router is viewed as the user and
the LAN in te r con n ect io n devic e at th e en d of th e ci rc ui t, a nd th e ATM switch is v iew ed a s th e n etw or k .

Figure 4-1 illustra t es t he r ou ter position in a basic ATM environmen t. T h e r o ut er is us e d pr imarily t o

interconnect LANs through an ATM network. Workstation C in Figure 4 -1 is con n ect ed di r ect ly to th e
desti na tion ATM switch. You can conn ect not only router s to ATM switche s, but a l s o any netw or k
device with a n ATM interface t ha t c on f or ms t o th e ATM Forum U NI s pe cifi cat io n.

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Figure 4-1 Basic ATM Environment

To use SVCs, complete the required tasks in the following sections:

• Configuring the PVC That Performs SVC Call Setup, page 4-10

• Configuring the Network Service Access Point Address, page 4-11

For further information on configuring the PA-A2 ATM CES port adapter for SVCs, see the Wide-Area
Networking Configuration Guide.

Config ur ing the PVC That P er f orms SVC Call Setup

ATM uses out-of-band signaling. One dedicated PVC exists between the router and the ATM switch,
over which a ll SVC c all estab li shment a nd ca ll term in ati on r eq u e sts flow. After the ca ll is estab lished ,
data transf er oc cu rs over the SVC, from rou te r to r oute r. The sign ali n g th at acco mp li s h es th e cal l s et up
and teard own i s ca ll ed L a yer 3 signaling or the Q.2931 protocol.

For out-of-band signaling, a signaling PVC must be configured before any SVCs can be set up. In

Figure 4-2, a signaling P VC from the sourc e router to the ATM switch is used to set up two SVCs. This

is a fully meshed network; workstations A, B, and C can all communicate with one another.

PBX

ATM

network

LAN

LAN

Workstation A

Workstation C

Workstation B

23552

PBX

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Figure 4-2 One or More SVCs Require a Signaling PVC

To configu r e the signaling P V C f or a ll SVC c on n ect io ns , en ter the f o llow in g co m m a nd i n interfa ce
configuration mode:

pvc vcd vpi vci qsaal

Note This si gn al in g P V C can be se t u p on a ma jo r in ter face only, not on the su bi nt er faces.

The VPI an d V C I values must be co nfigu r ed co n sis t ent ly with the l o cal sw it ch . Th e standar d valu e o f
VPI is 0, and the range of VP I values is 0 through 255. The standa rd val ue of VCI is 5, the range of VCI
values is 0 through 65535.

Note VCI values 0 through 31 are reserved and do not carry data traffic.

Config uring the Networ k Service Access Point Address

Every ATM in terfa ce involved with sig n ali ng must be co n fig ur ed with a net wo r k ser vi ce access poin t
(NSAP) ad dress. The NS A P add res s i s the ATM address of th e i nt erfac e an d m ust be unique acr o ss th e
networ k.

To configure an NSAP address, complete the tasks in the following sections:

• Configuring the Complete NSAP Address Manually, page 4-12

• Configuring the ESI and Selector Fields, page 4-12

ATM

Workstation A

Workstation B

S2836

Workstation C

LAN

LAN

LAN

Source router

SVC2

SVC1

SVC1

Destination router

SVC2

Q.2931 protocol

Signalling PVC

SVC1

SVC2

Destination
router

Q.2931 protocol

Signalling PVC

Q.2931 protocol

Signalling PVC

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T o configure the ESI and Selector fields, you must also configure a PVC to communicate with the switch
through ILMI:

Router(config-if)# pvc 0/16 ilmi

The switch t he n pr ovid es t he P refix field o f th e N S AP a dd r ess .

Configuring the Complete NSAP Address Manually

When you co nfigure th e N S A P ad d re s s m a nu al ly, you m u st enter th e en tir e ad dr ess in h exad ec im a l
format; t h at i s , e ach d ig it en te re d re pr esents a hex ad eci m al d ig it. To repre sen t t he co m p let e N S A P
address, you must enter 40 hexadecimal digits in the following format:

XX.XXXX.XX.XXXXXX.XXXX.XXXX.XXXX.XXXX.XXXX.XXXX.XX

Note All NSAP a ddr esse s mus t be e nter ed in th e dotte d hex ad eci mal forma t s ho wn, whi ch c on forms t o t he

UNI spec ificatio n.

Because the in terf a ce has no defa ult NSAP addr ess, yo u must c onf igu re the NSAP ad dres s for SVC s. To
set the ATM interfac e so ur ce N S A P ad d re s s, enter th e fo ll owing c om m an d in inte rf ace co nfigu r ati o n
mode:

nsap-address nsap-address

The following is an example of an NSAP address assigned to ATM interface 4/0 on a Cisco 7200 series,
Cisco uBR7200 series, or Cisco 7100 series router:

Router (config)# interface atm 4/0
Router (config-if)# nsap-address AB.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12

You can disp la y th e ATM addre ss f or t he in terface by executing t he s h ow inter f aces a t m command.

Configuring the ESI and Selector Fields

You can configure th e ro u ter to get the N S A P addr es s pr efix fr o m th e swi tch; however, the switch mu s t
be capable of delivering the NSAP address prefix to the router through ILMI, and the router must be
configured w it h a P V C f or commun ic ati on w i th the switch thro u gh IL M I .

To configure the router to get the NSAP prefix from the switch and use locally entered values for the
remaining fi eld s o f th e address, complete the fol lowin g tas k s i n in ter fa ce co nfi gu ration mod e:

Step 1 Specify an ATM interface to c on figur e.

Router(config)# interface atm slot/port or slot/port-adapter/port

Step 2 Enter the ESI a nd Sel ect o r fiel ds o f th e N S AP ad dres s.

Router(config-if)# esi-address esi.selector

In the esi - add ress co m ma nd , t he esi argument is 6 hexadecimal bytes long (12 digits), and the selector
argument is 1 hexadecimal byte long (2 digits).

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Chap ter 4 Config uring the PA-A2 A TM CE S Po r t Adapte r

PA-A2 ATM CES Configurations

In the fol low in g exam pl e o n a C is c o 7200 s er ies ro u ter, the ESI and S ele cto r fie ld values a re as si gn ed ,
and the I L M I P V C is s e t up :

Router(config)# interface atm 4/0
Router(config-if)# esi-address 345678901234.12

Configur i ng Cl assical IP and ARP over ATM

Cisco implements both the ATM Address Resolution Protocol (ARP) server and ATM ARP client
functions described in RFC 1577. RFC 1577 models an ATM network as a logical IP subnetwork on a
LAN.

The tasks required to configure classical IP and ARP over ATM depend on whether there are SVCs or
PVCs present in the environment. For further information, refer to the Wide-Area Networking
Configuration Guide.

Classes of Service and Transmit Priorit y on the PA-A2 A TM CES PortAdapter

The transmit pr iority determines which queued cell is chosen to be trans mitted out an in terface during a
cell time slot and ensures that real-time A TM service classes, which typically offer more robust QoS and
traffic guarantees, have a h ig he r lik eli ho o d of access to t he nex t cell time slot. Table 4-1 lists the ATM
service classes and their default transmit priorities on the PA-A2 ATM CES port adapter.

Note Refer to the Feature Module documentation and Technical Tips on Cisco.com for detailed information

about cla s ses o f s er v ice , configura tio n f eat ures , an d th e Cisco IO S releases t ha t t he s u ppo rt s p eci fic
features.

You can use the trans mit pri o ri ty command in VC confi gur at io n m ode to change th e prio ri ty value . The
following ex amp le shows a cu s to mi zed prio riti zation sch e me with the transm i t p r io rity value o f a V C
changed fr o m f our to t wo .

Caution Transmit pr ior ity 0 is reserved for co ntrol tr affic like OAM and s igna ling .

Table 4-1 ATM Classes of Service and Default Transmit Priorities on the PA-A2 ATM CES

Port Adapter

Service Category Transmit Priority

CBR, OA M cells an d signalin g 0
AAL5 or AAL2 VoATM VC (any service category) 1
rt-VBR 2
nrt-VBR 3
ABR 4
UBR 5

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Chapter4 Configuring the PA-A2 ATM CES PortAdapter

Customizing the PA-A2 ATM CES PortAdapter

Step 1 First, view the ch ar acteristics of the existi ng c on fig u ra tio n using th e sh ow at m vc {vcd# } command.

Note how the router has assigned a default transmit priority value of 5 to the UBR PVC:

Router# show atm vc 2
ATM5/0: VCD: 2, VPI: 1, VCI: 100
UBR, PeakRate: 10000
AAL5-LLC/SNAP, etype:0x0, Flags: 0x20, VCmode: 0x0
OAM frequency: 0 second(s)
PA TxRingLimit: 0 paritcles
PA Rx Limit: 0 particles
InARP frequency: 15 minute(s)
Transmit priority 5
InPkts: 0, OutPkts: 0, InBytes: 0, OutBytes: 0
InPRoc: 0, OutPRoc: 0, Broadcasts: 0
InPktsDrops: 0, OutPktDrops: 0
CrcErrors: 0, SarTimeOuts: 0. OverSizedSDUs: 0
OAM cells received: 0
OAM cells sent:0
Status: ACTIVE

Step 2 Next, customize the transmit priority value from VC configuration mode.

Router(config)# interface atm 5/0
Router(config-if)# pvc x/100
Router(config-if-atm-vc)# transmit-priority 2

Step 3 The final action is to confirm your settings. Note how the router indicates the changed transmit priority

level. It is now a t l evel 2 .

Router# show atm vc 2
VC 2 doesn’t exist on interface ATM2/0
ATM5/0: VCD: 2, VPI: 1, VCI: 100
UBR, PeakRate: 10000
AAL5-LLC/SNAP, etype:0x0, Flags: 0x20, VCmode: 0x0
OAM frequency: 0 second(s)
PA TxRingLimit: 0 paritcles
PA Rx Limit: 0 particles
InARP frequency: 15 minute(s)
Transmit priority 2
InPkts: 0, OutPkts: 0, InBytes: 0, OutBytes: 0
InPRoc: 0, OutPRoc: 0, Broadcasts: 0
InPktsDrops: 0, OutPktDrops: 0
CrcErrors: 0, SarTimeOuts: 0. OverSizedSDUs: 0
OAM cells received: 0
OAM cells sent:0
Status: ACTIVE

Customizing the PA-A2 ATM CE S Port Adapt er

You can cust om ize the PA-A2 ATM CES po rt adapter. The fe atu res y o u c an cu sto m i ze have d efa u lt
values t ha t w i ll probably s ui t yo ur environm ent an d no t need to be c hanged . H ow ever, y ou m i gh t need
to enter configuration commands, depending on the requirements for your system configuration and the
protocols you plan to route on the interface. Perform the tasks in the following sections if you need to
customize the PA-A2 ATM CES port adapter:

• Setting the MTU Size, page 4-15

• Configuring an ATM Interface for Local Loopback, page 4-15

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Checking the Configuration

• Configuring an ATM Interface for External Loopback, page 4-15

Note For the commands that follow, you need to be in interface configuration mode. To enter interface

conf iguration mode, use the interface atm command, followed by the interface address of the ATM
interface yo u p lan t o co nfigu r e.

Setting the MTU Size

Each ATM interface has a default maximum packet size or maximum transmission unit (MTU) size. On
the PA-A2 ATM CES port adapter, this number defaults to 4470 bytes, the range being 64 through
9188 byt es. To set the maxi mu m M TU size, enter the fo llow in g co mm a nd i n in ter fa ce configura ti on
mode:

Router(config-if)# mtu bytes

Note This command is d o cu m en ted in th e Configuration Fundamentals Command Reference.

Configur i ng an ATM Interf a ce f or Local Loo pback

To configu r e an ATM interface f or local lo op b ack ( u s ef ul f or c he c k in g th at th e PA-A2 ATM CES
port adapter is working by looping the transmit data back to the receive data), use the following
command:

Router(config-if)# loopback diagnostic
Router(config-if)# no loopback diagnostic

The no form of the command turns off local loopback.

Configur i ng an ATM Interf a ce f or External Loopback

To configu re an ATM interface for exter n al lo op b ack ( u s eful f or c he ck in g th at the PA-A2 ATM CES
port adapter is working by looping the receive data back to the transmit data), use the following
command:

Router(config-if)# loopback line
Router(config-if)# no loopback line

The no form of the comm a nd t ur n s o ff exter n al lo op b ack .

Checking the Configuration

After co n fig ur in g th e new interfa ce, u s e t he show commands to display the status of the new interface
or all interfaces, and use the ping and loopback commands to check connectivity. This section includes
the foll owi ng s u bsectio ns:

• Using s how Comm ands to Verify t he New Inte r fa c e Stat us, pag e 4 - 16

• Using the ping Command to Verify Network Connectivity, page 4-18

• Using loopback Commands, page 4-19

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Checking the Configur ation

Using show Commands to Verify the New Interface Status

This section demonstrates how you can use the show command s t o ver if y th at new in te rf ace s are
configured and oper ating correc tly an d th at the port ad ap ter appears in them correct ly. Sample disp lays
of the output of selected show commands ap p ear i n th e s e cti on s t ha t fo llow. For complete c om m an d
descriptions and examples, refer to the publications listed in the “Related Documentation” section on

page v iii.

If an interface is shut down and you configured it as up, or if the displays indicate that the hardware is
not funct io ning pr ope rl y, ens ure th at the inte rf ace is pr operl y c onne cted and t er minate d . If you sti ll ha v e
problems bringing up the interface, contact a service representative for assistance. This section includes
the foll owi ng s u bs e ctions:

• Using the show version or show hardware Commands, page 4-16

• Using the show diag C ommand, pag e 4-17

• Using the show in terfaces Command, page 4 -1 7

Using t he show ver sion or show hard ware Commands

Display the con f igur at io n of th e s yst em ha rdw ar e, the num ber of eac h in ter f ace ty pe ins tal le d, the Ci s co
IOS software version, the names and sources of configuration files, and the boot images using the
show version (or show hardware) co mmand.

Note The outputs that appear in this document may not match the output you receive when running these

command s. The out pu ts in th is do cu ment are ex amp le s o nl y.

Cisco 7200 Series Routers—Example Output of the show version Command

Following is an exa mp le of t he s h ow version command from a Cisco 7200 series router:

Router# show version

Cisco Internetwork Operating System Software
IOS (tm) 7200 Software (C7200-IS-M), Version 12.2(8)B, RELEASE SOFTWARE (fc1)
TAC Support: http://www.cisco.com/tac
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Fri 02-Aug-02 10:51 by ccai
Image text-base: 0x60008940, data-base: 0x61850000

ROM: System Bootstrap, Version 11.1(13)CA, EARLY DEPLOYMENT RELEASE SOFTWARE (f)
BOOTLDR: 7200 Software (C7200-BOOT-M), Version 11.1(16)CA, EARLY DEPLOYMENT REL

d11-5-7206-15 uptime is 1 week, 31 minutes
System returned to ROM by reload at 14:08:34 UTC Tue Aug 20 2002
System image file is "slot0:c7200-is-mz.122-11.T"

cisco 7206 (NPE200) processor (revision B) with 114688K/16384K bytes of memory.
Processor board ID 15455885
R5000 CPU at 200Mhz, Implementation 35, Rev 2.1, 512KB L2 Cache
6 slot midplane, Version 1.3

Last reset from power-on
Bridging software.
X.25 software, Version 3.0.0.
Primary Rate ISDN software, Version 1.1.
1 FastEthernet/IEEE 802.3 interface(s)

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Checking the Configuration

2 Serial network interface(s)
2 HSSI network interface(s)
11 ATM network interface(s)
4 Channelized T1/PRI port(s)
125K bytes of non-volatile configuration memory.
4096K bytes of packet SRAM memory.

20480K bytes of Flash PCMCIA card at slot 0 (Sector size 128K).
4096K bytes of Flash internal SIMM (Sector size 256K).
Configuration register is 0x2102

Using the show di ag Command

Display t he ty p e s o f p ort adapters i nst alled in y o ur s y st em (a n d sp eci fic in for m at io n ab ou t each ) u sin g
the show diag slot command, wher e slot is th e module slot.

Note The outputs that appear in this document may not match the output you receive when running these

command s. The out pu ts in th is do cu ment are ex amp le s o nl y.

Following is an exa mp le of t he s h ow d i ag slot command on a Cisco 7200 series router:

Router# show diag 6
Slot 6:
ATM WAN OC3+ (MM) Port adapter, 1 port
Port adapter is analyzed
Port adapter insertion time 00:44:57 ago
EEPROM contents at hardware discovery:
Hardware Revision: 1.0
PCB Serial Number:-----H
Part Number: 73-7981-0

Board Revision: 1A
RMA Test History: 00

RMA Number: 00-00-00

RMA History: 00
Unknown Field (type 0088): 00 00 00 01
Product Number: PA-ATM-DBL-DLX-OC3MM

Top Assy. Part Number: 800-20782-01
EEPROM format version 4
EEPROM contents (hex):

0x00: 04 FF 40 03 A7 41 01 00 C1 8B 2D 20 2D 20 2D 20

0x10: 2D 20 2D 20 48 82 49 1F 2D 01 42 31 41 03 00 81

0x20: 00 00 00 00 04 00 88 00 00 00 01 CB 94 50 41 2D

0x30: 41 54 4D 2D 44 42 4C 2D 44 4C 58 2D 4F 43 33 4D

0x40: 4D C0 46 03 20 00 51 2E 01 FF FF FF FF FF FF FF

0x50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

Using the show interfaces Command

The show interf aces command displays status information (including the physical slot and interface
address) f o r th e i nt erfac es y o u spe cif y.

For c ompl ete des cri pti on s of i nter fa ce subc omma nds an d the c onf i gur atio n o pt ions a v ai la ble for spe cif i c
interface s , r ef er to the p ub li cat io n s li sted i n the “Related Documentation” section on page viii.

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Chapter4 Configuring the PA-A2 ATM CES PortAdapter

Checking the Configur ation

Note The outputs that appear in this document may not match the output you receive when running these

command s. The out pu ts in th is do cu ment are ex amp le s o nl y.

Using th e show in terfa ces type module-slot-number/interface-port-number command d is p l a ys the
status information about a specific type of interface—in these ex amp les, an ATM interface.

Following is an exa mp le of t he s h ow inte rf aces command for the Cisco 7200 series routers:

Router# show interfaces atm 6/0
ATM6/0 is up, line protocol is up
Hardware is ENHANCED ATM PA Plus
MTU 4470 bytes, sub MTU 4470, BW 149760 Kbit, DLY 80 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ATM, loopback not set
Encapsulation(s): AAL5
8191 maximum active VCs, 1 current VCCs
VC idle disconnect time: 300 seconds
8 carrier transitions
Last input 00:37:33, output 00:26:16, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: None
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
54033 packets input, 81670740 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
8763526 packets output, 296268354 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out

Using the ping Command to Verify Network Connectivity

Using th e ping command, you can verify that an interface port is functioning properly. This section
provide s a bri ef d e sc r i pt ion of this co m m a nd. Ref er to the p u blicati on s listed in the “Related

Documentation” sectio n on pa ge viii f or d e t ailed co m m and de s c riptio ns and exa mples.

The ping command sends echo request packets out to a remote device at an IP address that you specify.
After sending an echo request, the system waits a specified time for the remote device to reply. Each
echo reply is displayed as an exclamation point (!) on the console terminal; each request that is not
returned before the specified timeout is displayed as a period (.). A series of exclamation points (!!!!!)

indicates a g oo d co n ne cti on ; a s e ri es o f p er io ds (. ....) or the m ess a ge s [ timed out ] or [ fai le d] i ndicate a

bad conn ec tion .
Following is an exa mp le of a suc ces sf u l pi ng command to a remote server with the address 10.0.0.10:

Router# ping 10.0.0.10 <Return>
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echoes to 10.0.0.10, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/15/64 ms
Router#

If the connection fails, verify that you have the correct IP addre ss for the destina tion and th at the device
is active (powered on), and repeat the ping command.

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Chap ter 4 Config uring the PA-A2 A TM CE S Po r t Adapte r

Checking the Configuration

Using l oopb ack Commands

The loopback command places an interface in loopback mode, which enables test packets that are
generated from the ping command to lo op t hr ough a re mote devic e. If th e pac ket s c ompl ete th e loop , the
connection is good. If not, you can isolate a fault to the remote device in the path of the loopback test.

The loopback diagnostic command on an ATM interface of a Cisco router causes traffic going out of the
interface to co m e b ack to t he route r.

If loopback is not set on the ATM interface, traffic will not be looped back. Traffic will go out but will
not retur n. App ly the loopback diagnostic command, and then use the show interface command to
show that loopback is indeed set:

Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.

Router(config)# interface a1/0
Router(config-if)# loopback diagnostic
Router(config-if)# atm clock internal
Router(config-if)# ^Z

Router# show interface a1/0
ATM1/0 is up, line protocol is up
Hardware is A6 ATM
MTU 4470 bytes, sub MTU 4470, BW 155520 Kbit, DLY 80 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ATM, loopback set
Keepalive not supported
Encapsulation(s): AAL5, PVC mode
256 TX buffers, 256 RX buffers,
2048 maximum active VCs, 1024 VCs per VP, 1 current VCCs
VC idle disconnect time: 300 seconds
Last input 00:03:16, output 00:03:16, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
163861 packets input, 3164940 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
33 input errors, 33 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
144191 packets output, 2138298 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 output buffer failures, 0 output buffers swapped out

Note To ensure proper clocking, set the router as the clock source by specifying the atm clock internal setting

in the main inter face co nfigu ration .

The loopback line command on an ATM interface of a Cisco router causes incoming traffic to be sent
back to t he network .

Router# config show interface a2/0
ATM2.0 is up, line protocol is up
Hardware is A6 ATM
MTU 4470 bytes, sub MTU 4470, BW 155520 kbit, DLY 80 usec,
reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ATM, loopback set
Keepalive not supported
Encapsulation(s): AAL5, PVC mode
2048 maximum active VCs, 1024 VCs per VP, 1 current VCCs

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Chapter4 Configuring the PA-A2 ATM CES PortAdapter

Traffic Management

VC idle disconnect time: 300 seconds
Last input 00:02:45, output 00:02:45, output hang never
Last clearing of “show interface” counter never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
94917 packets input, 1638383 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
102898 packets output, 2042785 bytes, 0 underruns
0 output errors, 0 collisions, 5 interface resets
0 ouput buffer failures, 0 output buffers swapped out

Tip For more information on understanding loopback modes on Cisco routers, refer to the ATM Technical

Tips on Cisco.com.

Traffic Ma nagement

The PA-A2 ATM CES port adapter supports the traffic-shaping parameters defined in Table 4-2. This
ensures th at ge ne ra ted traffic con f orm s to the ATM Forum Traffic Ma na gement Sp ec ific ati on Version

4.0. S hapin g values a r e confi gu red using t he vbr-nrt command in VC configuration mode.

Note For more information about traffic management specific to the various class of service categories, refer

to the ATM Technical Tips on C is c o.com.

Table 4-2 Traffic-Shaping Parameters and Ranges

Traffic Parameter Range Default

T3 56 kbps to 45 Mbps If the peak rate is not defined,

each new V C is s et to th e
maximum physical layer rate.
The VC i s as si g ne d t o th e U B R
servic e ca teg or y.

E3 56 kbps to 34 Mbps If the peak rate is not defined,

each new V C is s et to th e
maximum physical layer rate.
The VC i s as si g ne d t o th e U B R
servic e ca teg or y.

OC-3c Peak Rate 56 kbps to 155 Mbps If the peak rate is not defined,

each new V C is s et to th e
maximum physical layer rate.
The VC i s as si g ne d t o th e U B R
servic e ca teg or y.

Average Rate 0 < average <

peak rat e Average = p eak r at e a t t he

maximum physical layer rate.

Maximum Burst
Size

1 to 64,000 cells Equal to the PA-A2 AT M CES

port ad ap te r M TU size.

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Chap ter 4 Config uring the PA-A2 A TM CE S Po r t Adapte r

Troubleshooting the PA-A2 ATM CES Port Adapter Installation and Configuration

Troubleshooting the PA-A2 ATM CES PortAdapter Installation
and Configur ation

The following sections provide suggested guidelines for troubleshooting the PA-A2 ATM CES
port adapte r. Use the ping command to verify network connectivity, the de bug commands to help solve
network problems, and the show commands to di spl ay th e current state of th e ne tw or k .

Tip For more information about troubleshooting ATM port adapters and understanding the output from the

debug comman ds, re fe r to ATM Techni ca l Tips on C isc o. com .

The followin g to p ics ar e c overe d wit hi n th is section:

• PA-A2 ATM CES Port Adapter Statistics, page 4-21

• Using the debu g a tm Commands, page 4-22

• Displaying ATM Information, page 4-23

PA-A2 AT M C ES Port Adapt er Statistics

The PA-A2 ATM CES port adapter maintains a count of certain errors and tracks the ATM controller
facility performance. In addition to keeping a count of these errors, the PA-A2 ATM CES port adapter
also takes snapshots of the last VCI/VPI that caused the error. Each PA-A2 ATM CES port adapter error
counter is made up of 16 bits. Errors counted include the following:

• CRC errors

• Giants re ceived

• No buffe rs avai lab le

• Framing errors

• Application layer or physical layer errors

• Packet timeout errors on receive

The PA-A2 ATM CES port adapter provides port adapter-specific error statistics through the
show inte r faces atm command.

Note For examples o f th e show interfaces atm command for all s upp o rt ed p latfo r ms, see the “Using the

show interfaces Command” section on page 4-17.

The show con trollers atm command displays the ATM framing information and ATM facility
performance statistics. The statistics report section includes up to 96 15-minute interval reports, as well
as the current interval level. Only those intervals with non-zero data are displayed.

The followin g is an exampl e o f th e s how co n troll ers atm comma nd f rom a Cisco 7200 se ries ro ut er :

Router# show controllers atm 6/0
Interface ATM6/0 is up
Hardware is ENHANCED ATM PA Plus - OC3 (155000Kbps)
Framer is PMC PM5346 S/UNI-155-LITE, SAR is LSI ATMIZER II
Firmware rev: X101, Framer rev: 0, ATMIZER II rev: 4

idb=0x62EB7C74, ds=0x62EBF0A0, vc=0x62F41080
slot 6, unit 1, subunit 0, fci_type 0x03A7, ticks 9790

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Troubleshooting the PA-A2 ATM CES Por tAdapter Installation an d Configuration

5200 rx buffers: size=512, encap=64, trailer=28, magic=4

Curr Stats:

VCC count: current=1, peak=1
AAL2 VCC count: 0
AAL2 TX no buffer count: 0
AAL2 RX no buffer count: 0
SAR crashes: Rx SAR=0, Tx SAR=0
rx_cell_lost=0, rx_no_buffer=0, rx_crc_10=0, rx_no_mem=0
rx_cell_len=0, rx_no_vcd=0, rx_cell_throttle=0, tx_aci_err=0

Rx Free Ring status:

base=0x3F2EE040, size=8192, write=40

Rx Compl Ring status:

base=0x7E6AFF80, size=8192, read=3083

Tx Ring status:

base=0x3F723A00, size=12288, write=255

Tx Compl Ring status:

base=0x0E6BFFC0, size=8192, read=6271

BFD Cache status:

base=0x62F35000, size=12288, read=12286

Rx Cache status:

base=0x62F265C0, size=16, write=11

Tx Shadow status:

base=0x62F28F80, size=12288, read=239, write=255

Control data:

rx_max_spins=9, max_tx_count=50, tx_count=16
rx_threshold=3467, rx_count=11, tx_threshold=9216
tx bfd write indx=0x451, rx_pool_info=0x62F26660

Control data base address:

rx_buf_base = 0x0E3ABEE0 rx_p_base = 0x62ECAD80

rx_pak = 0x62DDE7F8 cmd = 0x62ECA7A0

framer = 0x603F75C0 framer_cb = 0x62ECABA0
framer_base = 0x3F100000 pci_pa_stats = 0x7E1B6840
device_base[0] = 0x3F000000 device_base[1] = 0x3F400000
ssram_base[0] = 0x3F200000 ssram_base[1] = 0x3F600000
sdram_base[0] = 0x3F300000 sdram_base[1] = 0x3F700000
pa_cmd_buf[0] = 0x3F2FFC00 pa_cmd_buf[1] = 0x3F6FFC00

vcd_base[0] = 0x3F200000 vcd_base[1] = 0x3F630000
chip_dump[0] = 0x0E1B6868 chip_dump[1] = 0x0E1B6958

sar_buf_base[0] = 0x3F334000 sar_buf_base[1] = 0x3F730000

bfd_base[0] = 0x3F2BE000 bfd_base[1] = 0x3F600000
acd_base[0] = 0x3F240080 acd_base[1] = 0x3F670240

Framer Information:

Framing mode: SONET OC3 STM-1
No alarm detected

Note For more information about CRC errors, using the show in te r f aces c omman d, a n d us ing the show

controllers c ommand, r ef er to Technica l As si s tan ce C en ter ( TAC) documentatio n on C isco.com.

Using the debug atm Com man ds

The follow in g debug com mands help to so lve ATM network problems.

• Use the debug atm packet command to cr ea te a dump o f al l p r ot o co l pack ets. The c om man d

displays the contents of the SNAP/NLPID/SMDS header followed by the first 40 bytes of a packet
in hexadecimal format.

Router# debug atm packet

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Troubleshooting the PA-A2 ATM CES Port Adapter Installation and Configuration

• Use the debug atm errors command to display errors. The co mmand displays information from all

detected ATM errors. This includes such errors as encapsulation failures and errors during ATM
configurati o n.

Router# debug atm errors

• Use the debug atm events command to display ATM events. The command displays event changes

to the PA-A2 ATM CES port adapter; reset, VC configurations, and PA-A2 ATM CES port adapter
configu r a ti ons are disp layed.

Router# debug atm events

• Use the de b ug atm oam command to display information about OAM cells. The command displays

the contents of OAM cells as they arrive from the network.

Router# debug atm oam

Use the no debug command t o turn off de bug ging a ft e r u s in g a debug command.

Displaying ATM Information

You can use atm show commands t o di spl ay th e current state of th e ATM network a nd the con ne cted
VCs.

• Use the show atm vc [vcd] command to show current V Cs and tra ffic informati on. Spe cify ing a

VCD di spl ay s s p eci fic in fo rm at io n abo u t t h at VCD.

Router# show atm vc [vcd]

• Use the show atm interfa ces c om m an d to sh ow cu rren t inform at io n ab ou t an ATM interface. Th e

command displays ATM-specific information about an interface.

Router# show atm interfaces

• Use the show atm traffic comman d to sh ow cu rren t ATM traffic. The co mm a nd d isp lays glob al

informat io n ab ou t tr affic to an d f rom a ll ATM networks co nn ec ted t o th e r o ut er.

Router# show atm traffic

• Use the show atm map comma nd t o show the cu rr en t ATM mapping. The com mand disp la ys the

active list of ATM static maps to remote hosts on an ATM network.

Router# show atm map

Use the show atm vc comman d to d is p lay the f o llow ing typ es o f s ta tistics f or a ll PVCs:

Router# show atm vc

VCD/ Peak Avg/Min Burst
Interface Name VPI VCI Type Encaps SC Kbps Kbps Cells Status
6/0 1 10 100 PVC SNAP VBR 33920 0 0 UP
6/0.300 4 8 88 PVC SNAP VBR 30000 30000 20000 UP

Use the show atm vc n comman d , w h er e n i s the VCD unique in dex value, to displa y s tat istics for a
given PV C :

Router# show atm vc 4
ATM6/0.300: VCD:4, VPI:8, VCI:88
VBR-NRT, PeakRate:30000, Average Rate:30000, Burst Cells:20000
AAL5-LLC/SNAP, etype:0x0, Flags:0x20, VCmode:0x0
OAM frequency: 0 second(s)
VC TxRingLimit: 1179 particles
InARP frequency: 15 minute(s)

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Chapter4 Configuring the PA-A2 ATM CES PortAdapter

ATM Configuration

Transmit priority: 4
InPkts: 0, OutPkts: 0, InBytes: 0, OutBytes: 0
InPRoc: 0, OutPRoc: 0, Broadcasts: 0
InFast: 0, OutPktDrops: 0/0/0 (holdq/outputq/total)
CrcErrors: 0, SarTimeOuts: 0, OverSizedSDUs: 0, Length Violation: 0, CPIErrors: 0
Out CLP=1 Pkts: 0
OAM cells received: 0
OAM cells sent: 0
Status: UP

Use the show interfac e s a t m c ommand to d isp la y statist ics fo r th e ATM interfac e y ou sp ecify by its
interface address. Use the show interfaces atm command to display the currently running PA-A2 ATM
CES port adapter configuration in RAM:

Router# show interfaces atm 3/0
interface ATM 3/0
ip address 10.10.10.2 255.255.255.0
map-group atm1
pvc 1 0 1 aal5snap

Note For examples o f th e show interfaces atm command for all s upp o rt ed p latfo r ms, see the “Using the

show interfaces Command” section on page 4-17.

Use the

show sscop com m an d to d is p la y S S C O P d et a il s f or t he ATM inter fa ce.

Use the show version command to display the configuration of the system hardware (the number of each
interface processor type installed), the software version, the names and sources of configuration files,
and the b o ot images.

Note For examples o f th e show ve r sion command fo r all suppo r ted p la tf orm s, s ee th e “Us ing th e show

version or show hardware Commands” section on page 4-16.

ATM Configuration

Cisco IOS Release 11.3 T introduced the ATM VC command mode, which, in turn, introduced several
new ATM commands that allow you to configure ATM parameters more easily. The new VC
configuration mode uses protocol ip an d other stat ement s (replace ip with ipx, decnet, and so on) to
configure static mappings. The protocol statement takes the place of the map-list and map-group
statement s u s ed in ve rsi o ns p r io r to C isco IOS R elease 1 1.3 T.

For detailed configuration examples, refer to the router software publications listed in the “Related

Documentation” sectio n on pa ge viii.

The followin g example shows how to cr ea te a PVC AA L 5 SNAP. The interface is at IP a ddr es s 2 .2 .2 .1,
with 2.2.2.2 at the other end of the connection.

First Router :

interface ATM 3/0
ip address 10.0.0.1 255.0.0.0
no keepalive
map-group atm-in
atm clock internal
atm pvc 1 1 5 aal5snap
!

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Upgrading Your Boot Flash Image

map-list atm-in
ip 10.0.0.2 atm-vc 1 broadcast

Second Router:

interface ATM 3/0
ip address 10.0.0.2 255.0.0.0
no keepalive
map-group atm-in
atm pvc 1 1 5 aal5snap
!
map-list atm-in
ip 10.0.0.1 atm-vc 1 broadcast

Upgrading Your Boo t Flash Image

The boot image contains a subset of the Cisco IOS software. This image is used to perform network
booting or to load Cisco IOS images onto the router. This image is also used if the system cannot find a
valid system i mag e.

When you upgrade your Cisco IOS software to the minimum required software release, we recommend
that you also upgrade your boot image. To upgrade your boot image, you can copy the new boot image
from a network server to Flash memory on your router.

To copy a b o ot image fr om a Trivia l F i le Transf er Pr ot oc ol ( TF TP ) se rve r to F la sh m emo r y, comple te
the following procedure:

Step 1 Enter configuration mode.

Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#

Step 2 Display and note the exact sp elling of t he s y stem image fil en ame in Fl ash m emory.

Router(config)# show flash all

Step 3 Make a backup copy of the current boot image.

Router(config)# copy flash tftp

Step 4 Copy a bo o t i m ag e to F lash m em o r y.

Router(config)# copy tftp flash

Step 5 When pro mp ted , en ter t he I P ad dres s or d o mai n na m e o f th e server.

Router(config)# ip-address or name

For furt her i nform ati on, suc h as ho w t o set u p the T FTP ser ver, refer to the Conf iguration Funda menta ls
Configuration Guide.

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Chapter4 Configuring the PA-A2 ATM CES PortAdapter

Port Adapter Error Messages

Port Adapter Error Messages

All of t he PA-A2 ATM CES p o rt ad ap ter re ceive buffers a re al lo cat ed f ro m s tat ic ra nd o m- access
memory (SRAM). As a result, during bootup, if the PA-A2 ATM CES port adapter cannot find enough
contiguous SRAM for its use, the system stops bringing up the PA-A2 ATM CES port adapter and
displa y s a n error mess a ge suc h as t he fol low in g:

%ATMPA-A2-PCIMEMNOTENOUGH: Not Enough PCI memory (0x19874) to support ATM PA on bay 5