Cisco ASR 900 Series Configuration Manual

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Time Division Multiplexing Configuration Guide, Cisco IOS XE Fuji

16.7.x (Cisco ASR 900 Series)

First Published: 2017-11-17

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CHAPTER 1

Configuring Pseudowire 1

Pseudowire Overview 1

Limitations 2

Circuit Emulation Overview 3

Structure-Agnostic TDM over Packet 3

Circuit Emulation Service over Packet-Switched Network 4

Asynchronous Transfer Mode over MPLS 6

Transportation of Service Using Ethernet over MPLS 7

Limitations 7

Configuring CEM 8

Configuration Guidelines and Restrictions 8

Configuring a CEM Group 8

Using CEM Classes 10

Configuring a Clear-Channel ATM Interface 12

Configuring CEM Parameters 12

Configuring Payload Size (Optional) 12

Setting the Dejitter Buffer Size 13

Setting an Idle Pattern (Optional) 13

Enabling Dummy Mode 13

Setting a Dummy Pattern 13

Shutting Down a CEM Channel 13

Configuring CAS 14

Information About CAS 14

Configuring CAS 14

Verifying CAS Configuration 16

Configuration Examples for CAS 16

Configuring ATM 17

Configuring a Clear-Channel ATM Interface 17

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Contents

Configuring ATM IMA 18

BGP PIC with TDM Configuration 21

Configuring Structure-Agnostic TDM over Packet (SAToP) 21

Configuring Circuit Emulation Service over Packet-Switched Network (CESoPSN) 23

Configuring a Clear-Channel ATM Pseudowire 24

Configuring an ATM over MPLS Pseudowire 26

Configuring the Controller 26

Configuring an IMA Interface 27

Configuring the ATM over MPLS Pseudowire Interface 29

Configuring 1-to-1 VCC Cell Transport Pseudowire 30

Mapping a Single PVC to a Pseudowire 30

Configuring N-to-1 VCC Cell Transport Pseudowire 31

Configuring 1-to-1 VPC Cell Transport 31

Configuring ATM AAL5 SDU VCC Transport 33

Configuring a Port Mode Pseudowire 35

Optional Configurations 36

Configuring an Ethernet over MPLS Pseudowire 37

Configuring Pseudowire Redundancy 39

Pseudowire Redundancy with Uni-directional Active-Active 41

Restrictions 42

Configuring Pseudowire Redundancy Active-Active— Protocol Based 43

Configuring the Working Controller for MR-APS with Pseudowire Redundancy

Active-Active 43

Configuring the Protect Controller for MR-APS with Pseudowire Redundancy

Active-Active 44

Verifying the Interface Configuration 44

Configuration Examples 45

Example: CEM Configuration 45

Example: BGP PIC with TDM Configuration 45

Example: BGP PIC with TDM-PW Configuration 46

Example: ATM IMA Configuration 47

Example: ATM over MPLS 47

Cell Packing Configuration Examples 48

VC Mode 48

VP Mode 49

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Contents

Cell Relay Configuration Examples 51

VC Mode 51

VP Mode 52

Example: Ethernet over MPLS 53

CHAPTER 2

CHAPTER 3

Automatic Protection Switching Configuration 57

Automatic Protection Switching 57

Inter Chassis Redundancy Manager 58

Limitations 58

Automatic Protection Switching Interfaces Configuration 59

Configuring a Working Interface 59

Configuring a Protect Interface 60

Configuring Other APS Options 61

Stateful MLPPP Configuration with MR-APS Inter-Chassis Redundancy 63

Monitoring and Maintaining APS 63

Configuring Multi Router Automatic Protection Switching 65

Finding Feature Information 66

Restrictions for MR-APS 66

Information About MR-APS 66

Configuring MR-APS with HSPW-ICRM on a CEM interface 69

CHAPTER 4

Verifying MR-APS 74

Configuration Examples for MR-APS 82

Configuring MR-APS on a POS interface 84

Configuring working node for POS MR-APS 84

Configuring protect node for POS MR-APS 87

Verifying MR-APS on POS interface 91

Configuration Examples for MR-APS on POS interface 93

Hot Standby Pseudowire Support for ATM and TDM Access Circuits 95

Finding Feature Information 95

Prerequisites for Hot Standby Pseudowire Support for ATM and TDM Access Circuits 96

Restrictions for Hot Standby Pseudowire Support for ATM and TDM Access Circuits 96

Information About Hot Standby Pseudowire Support for ATM and TDM Access Circuits 97

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Contents

How the Hot Standby Pseudowire Support for ATM and TDM Access Circuits Feature

Works 97

Supported Transport Types 97

How to Configure Hot Standby Pseudowire Support for ATM and TDM Access Circuits 98

Configuring a Pseudowire for Static VPLS 98

Configuring Hot Standby Pseudowire Support for ATM and TDM Access Circuits 100

Verifying the Hot Standby Pseudowire Support for ATM and TDM Access Circuits

Configuration 102

Configuration Examples for Hot Standby Pseudowire Support for ATM and TDM Access

Circuits 104

Configuring Hot Standby Pseudowire Support for ATM and TDM Access Circuits on CEM

Circuits Example 104

Additional References 105

CHAPTER 5

PPP and Multilink PPP Configuration 107

Limitations 107

PPP and Multilink PPP 108

Point-to-Point Protocol 108

CHAP or PPP Authentication 108

IP Address Pooling 109

Peer Address Allocation 109

Precedence Rules 110

MLP on Synchronous Serial Interfaces 111

How to Configure PPP 111

Enabling PPP Encapsulation 111

Enabling CHAP or PAP Authentication 112

Configuring IP Address Pooling 114

Global Default Address Pooling Mechanism 114

Defining DHCP as the Global Default Mechanism 114

Defining Local Address Pooling as the Global Default Mechanism 116

Controlling DHCP Network Discovery 117

Configuring IP Address Assignment 118

Disabling or Reenabling Peer Neighbor Routes 119

Configuring Multilink PPP 120

Configuring MLP on Synchronous Interfaces 121

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Contents

Configuring a Multilink Group 122

Configuring PFC and ACFC 124

Configuring ACFC 124

Configuring PFC 125

Changing the Default Endpoint Discriminator 126

Creating a Multilink Bundle 128

Assigning an Interface to a Multilink Bundle 129

Configuring PPP/MLP MRRU Negotiation Configuration on Multilink Groups 130

Disabling PPP Multilink Fragmentation 133

Troubleshooting Tips 134

Troubleshooting PPP 134

Monitoring and Maintaining PPP and MLP Interfaces 134

CHAPTER 6

Transparent SONET or SDH over Packet (TSoP) Protocol 135

Prerequisites for TSoP 135

Restrictions for TSoP 135

Information About TSoP Smart SFP 136

Guidelines for TSoP Smart SFP 136

Configuring the Reference Clock 137

Configuration Examples for TSoP 139

Verification Examples 140

Verifying TSoP Smart SFP 140

Verifying Clock Source 141

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Contents

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CHAPTER 1

Configuring Pseudowire

This chapter provides information about configuring pseudowire (PW) features on the router.

Pseudowire Overview, page 1

•

Limitations, page 7

•

Configuring CEM, page 8

•

Configuring CAS, page 14

•

Configuring ATM, page 17

•

Configuring Structure-Agnostic TDM over Packet (SAToP), page 21

•

Configuring Circuit Emulation Service over Packet-Switched Network (CESoPSN), page 23

•

Configuring a Clear-Channel ATM Pseudowire, page 24

•

Configuring an ATM over MPLS Pseudowire, page 26

•

Configuring an Ethernet over MPLS Pseudowire, page 37

•

Configuring Pseudowire Redundancy, page 39

•

Pseudowire Redundancy with Uni-directional Active-Active , page 41

•

Restrictions , page 42

•

• Configuring Pseudowire Redundancy Active-Active— Protocol Based, page 43

Configuring the Working Controller for MR-APS with Pseudowire Redundancy Active-Active, page

•

Configuring the Protect Controller for MR-APS with Pseudowire Redundancy Active-Active, page 44

•

Verifying the Interface Configuration, page 44

•

Configuration Examples, page 45

•

Pseudowire Overview

The following sections provide an overview of pseudowire support on the router.

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Limitations

Configuring Pseudowire

Effective Cisco IOS XE Release 3.18S:

BGP PIC with TDM Pseudowire is supported on the ASR 900 router with RSP2 module.

•

BGP PIC for Pseudowires, with MPLS Traffic Engineering is supported on the ASR 900 router with

•

RSP1 and RSP2 modules.

Starting Cisco IOS XE Release 3.18.1SP, Pseudowire Uni-directional Active-Active is supported on the RSP1 and RSP3 modules.

If you are running Cisco IOS XE Release 3.17S, the following limitation applies:

BGP PIC with TDM Pseudowire is supported only on the ASR 900 router with RSP1 module.

•

If you are running Cisco IOS XE Release 3.17S and later releases, the following limitations apply:

Channel associated signaling (CAS) is not supported on the T1/E1 and OC-3 interface modules on the

•

router.

BGP PIC is not supported for MPLS/LDP over MLPPP and POS in the core.

•

BGP PIC is not supported for Multi-segment Pseudowire or Pseudowire switching.

•

BGP PIC is not supported for VPLS and H-VPLS

•

BGP PIC is not supported for IPv6.

•

If BGP PIC is enabled, Multi-hop BFD should not be configured using the bfd neighbor fall-overr bfd

•

command.

If BGP PIC is enabled, neighbor ip-address weight weight command should not be configured.

•

If BGP PIC is enabled, bgp nexthop trigger delay 6 under the address-family ipv4 command and bgp

•

nexthop trigger delay 7 under the address-family vpnv4 command should be configured. For information on the configuration examples for BGP PIC–TDM, see Example: BGP PIC with TDM-PW

Configuration, on page 46.

If BGP PIC is enabled and the targeted LDP for VPWS cross-connect services are established over BGP,

•

perform the following tasks:

configure Pseudowire-class (pw-class) with encapsulation "mpls"

◦

configure no status control-plane route-watch under the pw-class

◦

associate the pw-class with the VPWS cross-connect configurations

◦

If you are running Cisco IOS-XE 3.18S, the following restrictions apply for BGP PIC with MPLS TE for TDM Pseudowire:

MPLS TE over MLPPP and POS in the core is not supported.

•

Co-existence of BGP PIC with MPLS Traffic Engineering Fast Reroute (MPLS TE FRR) is not supported.

•

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Configuring Pseudowire

Circuit Emulation Overview

Circuit Emulation (CEM) is a technology that provides a protocol-independent transport over IP networks. It enables proprietary or legacy applications to be carried transparently to the destination, similar to a leased line.

The Cisco ASR 903 Series Router supports two pseudowire types that utilize CEM transport: Structure-Agnostic TDM over Packet (SAToP) and Circuit Emulation Service over Packet-Switched Network (CESoPSN). The following sections provide an overview of these pseudowire types.

Starting with Cisco IOS XE Release 3.15, the 32xT1E1 and 8x T1/E1 interface modules support CEM CESoP and SATOP configurations with fractional timeslots.

With the 32xT1/E1 and 8xT1/E1 interface modules, the channelized CEM circuits configured under a single port (fractional timeslot) cannot be deleted or modified, unless the circuits created after the first CEM circuits are deleted or modified.

The following CEM circuits are supported on the 32xT1/E1 interface module:

T1 mode

Circuit Emulation Overview

192 CESOP circuits with fractional timeslot

•

◦

32 CESOP circuit full timeslot

◦

32 SATOP circuits.

◦

E1 mode

256 CESOP circuit with fractional timeslot.

•

◦

32 CESOP circuit full timeslot

◦

32 SATOP circuit

◦

Structure-Agnostic TDM over Packet

SAToP encapsulates time division multiplexing (TDM) bit-streams (T1, E1, T3, E3) as PWs over public switched networks. It disregards any structure that may be imposed on streams, in particular the structure imposed by the standard TDM framing.

The protocol used for emulation of these services does not depend on the method in which attachment circuits are delivered to the provider edge (PE) devices. For example, a T1 attachment circuit is treated the same way for all delivery methods, including copper, multiplex in a T3 circuit, a virtual tributary of a SONET/SDH circuit, or unstructured Circuit Emulation Service (CES).

In SAToP mode the interface is considered as a continuous framed bit stream. The packetization of the stream is done according to IETF RFC 4553. All signaling is carried out transparently as a part of a bit stream. Figure

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Circuit Emulation Service over Packet-Switched Network

1: Unstructured SAToP Mode Frame Format, on page 4 shows the frame format in Unstructured SAToP

mode.

Figure 1: Unstructured SAToP Mode Frame Format

Table 1: SAToP T1 Frame: Payload and Jitter Limits, on page 4 shows the payload and jitter limits for the

T1 lines in the SAToP frame format.

Table 1: SAToP T1 Frame: Payload and Jitter Limits

Configuring Pseudowire

Minimum JitterMaximum JitterMaximum

Payload

Table 2: SAToP E1 Frame: Payload and Jitter Limits, on page 4 shows the payload and jitter limits for the

E1 lines in the SAToP frame format.

Table 2: SAToP E1 Frame: Payload and Jitter Limits

Minimum JitterMaximum JitterMaximum

Payload

For instructions on how to configure SAToP, see Configuring Structure-Agnostic TDM over Packet (SAToP),

on page 21.

Circuit Emulation Service over Packet-Switched Network

CESoPSN encapsulates structured TDM signals as PWs over public switched networks (PSNs). It complements similar work for structure-agnostic emulation of TDM bit streams, such as SAToP. Emulation of circuits saves PSN bandwidth and supports DS0-level grooming and distributed cross-connect applications. It also enhances resilience of CE devices due to the effects of loss of packets in the PSN.

CESoPSN identifies framing and sends only the payload, which can either be channelized T1s within DS3 or DS0s within T1. DS0s can be bundled to the same packet. The CESoPSN mode is based on IETF RFC 5086.

Each supported interface can be configured individually to any supported mode. The supported services comply with IETF and ITU drafts and standards.

Minimum JitterMaximum JitterMinimum

26419210320960

Minimum JitterMaximum JitterMinimum

264256103201280

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Configuring Pseudowire

Circuit Emulation Service over Packet-Switched Network

Figure 2: Structured CESoPSN Mode Frame Format, on page 5 shows the frame format in CESoPSN mode.

Figure 2: Structured CESoPSN Mode Frame Format

Table 3: CESoPSN DS0 Lines: Payload and Jitter Limits, on page 5 shows the payload and jitter for the

DS0 lines in the CESoPSN mode.

Table 3: CESoPSN DS0 Lines: Payload and Jitter Limits

DS0

Maximum Payload

Maximum Jitter

Minimum Jitter

Minimum Payload

Maximum Jitter

Minimum Jitter

82563210320401

41283210320802

412833103201203

26432103201604

26440103202005

26448103202406

26456103202807

26464103203208

26472103203609

264801032040010

264881032044011

264961032048012

2641041032052013

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Asynchronous Transfer Mode over MPLS

Configuring Pseudowire

DS0

Maximum Payload

Maximum Jitter

Minimum Jitter

Minimum Payload

Maximum Jitter

Minimum Jitter

2641121032056014

2641201032060015

2641281032064016

2641361032068017

2641441032072018

2641521032076019

2641601032080020

2641681032084021

2641761032088022

2641841032092023

2641921032096024

For instructions on how to configure SAToP, see Configuring Structure-Agnostic TDM over Packet (SAToP),

on page 21.

Asynchronous Transfer Mode over MPLS

An ATM over MPLS (AToM) PW is used to carry Asynchronous Transfer Mode (ATM) cells over an MPLS network. It is an evolutionary technology that allows you to migrate packet networks from legacy networks,

26420010320100025

26420810320104026

26421610320108027

26422410320112028

26423210320116029

26424010320120030

26424810320124031

26425610320128032

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Configuring Pseudowire

Transportation of Service Using Ethernet over MPLS

while providing transport for legacy applications. AToM is particularly useful for transporting 3G voice traffic over MPLS networks.

You can configure AToM in the following modes:

• N-to-1 Cell—Maps one or more ATM virtual channel connections (VCCs) or virtual permanent connection

(VPCs) to a single pseudowire.

• 1-to-1 Cell—Maps a single ATM VCC or VPC to a single pseudowire.

• Port—Maps a single physical port to a single pseudowire connection.

The Cisco ASR 903 Series Router also supports cell packing and PVC mapping for AToM pseudowires.

This release does not support AToM N-to-1 Cell Mode or 1-to-1 Cell Mode.Note

For more information about how to configure AToM, see Configuring an ATM over MPLS Pseudowire, on

page 26.

Transportation of Service Using Ethernet over MPLS

Ethernet over MPLS (EoMPLS) PWs provide a tunneling mechanism for Ethernet traffic through an MPLS-enabled Layer 3 core network. EoMPLS PWs encapsulate Ethernet protocol data units (PDUs) inside MPLS packets and use label switching to forward them across an MPLS network. EoMPLS PWs are an evolutionary technology that allows you to migrate packet networks from legacy networks while providing transport for legacy applications. EoMPLS PWs also simplify provisioning, since the provider edge equipment only requires Layer 2 connectivity to the connected customer edge (CE) equipment. The Cisco ASR 903 Series Router implementation of EoMPLS PWs is compliant with the RFC 4447 and 4448 standards.

The Cisco ASR 903 Series Router supports VLAN rewriting on EoMPLS PWs. If the two networks use different VLAN IDs, the router rewrites PW packets using the appropriate VLAN number for the local network.

For instructions on how to create an EoMPLS PW, see Configuring an Ethernet over MPLS Pseudowire, on

page 37.

Limitations

If you are running Cisco IOS XE Release 3.17S, the following limitation applies:

BGP PIC with TDM Pseudowire is supported only on the ASR 900 router with RSP1 module.

•

If you are running Cisco IOS XE Release 3.17S and later releases, the following limitations apply:

Channel associated signaling (CAS) is not supported on the T1/E1 and OC-3 interface modules on the

•

router.

BGP PIC is not supported for MPLS/LDP over MLPPP and POS in the core.

•

BGP PIC is not supported for Multi-segment Pseudowire or Pseudowire switching.

•

BGP PIC is not supported for VPLS and H-VPLS

•

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Configuring CEM

Configuring Pseudowire

BGP PIC is not supported for IPv6.

•

If BGP PIC is enabled, Multi-hop BFD should not be configured using the bfd neighbor fall-overr bfd

•

command.

If BGP PIC is enabled, neighbor ip-address weight weight command should not be configured.

•

If BGP PIC is enabled, bgp nexthop trigger delay 6 under the address-family ipv4 command and bgp

•

nexthop trigger delay 7 under the address-family vpnv4 command should be configured. For information on the configuration examples for BGP PIC–TDM, see Example: BGP PIC with TDM-PW

Configuration, on page 46.

If BGP PIC is enabled and the targeted LDP for VPWS cross-connect services are established over BGP,

•

perform the following tasks:

configure Pseudowire-class (pw-class) with encapsulation "mpls"

◦

configure no status control-plane route-watch under the pw-class

◦

associate the pw-class with the VPWS cross-connect configurations

◦

If you are running Cisco IOS-XE 3.18S, the following restrictions apply for BGP PIC with MPLS TE for TDM Pseudowire:

MPLS TE over MLPPP and POS in the core is not supported.

•

Co-existence of BGP PIC with MPLS Traffic Engineering Fast Reroute (MPLS TE FRR) is not supported.

•

Configuring CEM

This section provides information about how to configure CEM. CEM provides a bridge between a time-division multiplexing (TDM) network and a packet network, such as Multiprotocol Label Switching (MPLS). The router encapsulates the TDM data in the MPLS packets and sends the data over a CEM pseudowire to the remote provider edge (PE) router. Thus, function as a physical communication link across the packet network.

The following sections describe how to configure CEM:

Note

Configuration Guidelines and Restrictions

Steps for configuring CEM features are also included in the Configuring Structure-Agnostic TDM over

Packet (SAToP), on page 21 and Configuring Circuit Emulation Service over Packet-Switched Network (CESoPSN), on page 23 sections.

Not all combinations of payload size and dejitter buffer size are supported. If you apply an incompatible payload size or dejitter buffer size configuration, the router rejects it and reverts to the previous configuration.

Configuring a CEM Group

The following section describes how to configure a CEM group on the Cisco ASR 903 Series Router.

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Configuring Pseudowire

SUMMARY STEPS

DETAILED STEPS

enable

configure terminal

controller {t1 | e1} slot/subslot/port

cem-group group-number {unframed | timeslots timeslot}

end

PurposeCommand or Action

Configuring a CEM Group

Step 1

Step 2

Step 3

Step 4

Example:

Router> enable

Example:

Router# configure terminal

controller {t1 | e1} slot/subslot/port

Example:

Router(config)# controller t1 1/0

cem-group group-number {unframed | timeslots timeslot}

Example:

Router(config-controller)# cem-group

6 timeslots 1-4,9,10

Enables privileged EXEC mode.enable

Enter your password if prompted.

•

Enters global configuration mode.configure terminal

Enters controller configuration mode.

Use the slot and port arguments to specify the slot number and port

•

number to be configured.

Note

The slot number is always

0. Creates a circuit emulation channel from one or more time slots of a T1 or E1 line.

The group-number keyword identifies the channel number to be

•

used for this channel. For T1 ports, the range is 0 to 23. For E1 ports, the range is 0 to 30.

Use the unframed keyword to specify that a single CEM channel is

•

being created including all time slots and the framing structure of the line.

Step 5

Example:

Router(config-controller)# end

Time Division Multiplexing Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco ASR 900 Series)

Use the timeslots keyword and the timeslot argument to specify the

•

time slots to be included in the CEM channel. The list of time slots may include commas and hyphens with no spaces between the numbers.

Exits controller configuration mode and returns to privileged EXEC mode.end

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Using CEM Classes

A CEM class allows you to create a single configuration template for multiple CEM pseudowires. Follow these steps to configure a CEM class:

Configuring Pseudowire

Note

SUMMARY STEPS

DETAILED STEPS

The CEM parameters at the local and remote ends of a CEM circuit must match; otherwise, the pseudowire between the local and remote PE routers will not come up.

You cannot apply a CEM class to other pseudowire types such as ATM over MPLS.Note

enable

configure terminal

class cem cem-class

payload-size size | dejitter-buffer buffer-size | idle-pattern pattern

exit

interface cem slot/subslot

exit

PurposeCommand or Action

Step 1

Step 2

Step 3

Enables privileged EXEC mode.enable

Enter your password if prompted.

Example:

Router> enable

•

Enters global configuration mode.configure terminal

Example:

Router# configure terminal

class cem cem-class

Example:

Router(config)# class cem mycemclass

Time Division Multiplexing Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco ASR 900 Series)

Creates a new CEM class

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Configuring Pseudowire

Using CEM Classes

PurposeCommand or Action

Step 4

Step 5

Step 6

payload-size size | dejitter-buffer buffer-size | idle-pattern pattern

Example:

Router(config-cem-class)# payload-size 512

Example:

Router(config-cem-class)# dejitter-buffer 10

Example:

Router(config-cem-class)# idle-pattern 0x55

Example:

Router(config-cem-class)# exit

interface cem slot/subslot

Example:

Enter the configuration commands common to the CEM class. This example specifies a sample rate, payload size, dejitter buffer, and idle pattern.

Returns to the config prompt.exit

Configure the CEM interface that you want to use for the new CEM class.

Note

The use of the xconnect command can vary depending on the type of pseudowire you are configuring.

Router(config)# interface cem 0/0

Example:

Router(config-if)# no ip address

Example:

Router(config-if)# cem 0

Example:

Router(config-if-cem)# cem class mycemclass

Example:

Router(config-if-cem)# xconnect 10.10.10.10 200 encapsulation mpls

Example:

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Configuring a Clear-Channel ATM Interface

Configuring Pseudowire

PurposeCommand or Action

Step 7

Example:

Router(config-if-cem)# exit

Example:

Step 8

Example:

Router(config-if)# exit

Example:

Configuring a Clear-Channel ATM Interface

Configuring CEM Parameters

Exits the CEM interface.exit

Exits configuration mode.exit

The following sections describe the parameters you can configure for CEM circuits.

Note

The CEM parameters at the local and remote ends of a CEM circuit must match; otherwise, the pseudowire between the local and remote PE routers will not come up.

Configuring Payload Size (Optional)

To specify the number of bytes encapsulated into a single IP packet, use the pay-load size command. The size argument specifies the number of bytes in the payload of each packet. The range is from 32 to 1312 bytes.

Default payload sizes for an unstructured CEM channel are as follows:

E1 = 256 bytes

•

T1 = 192 bytes

•

DS0 = 32 bytes

•

Default payload sizes for a structured CEM channel depend on the number of time slots that constitute the channel. Payload size (L in bytes), number of time slots (N), and packetization delay (D in milliseconds) have the following relationship: L = 8*N*D. The default payload size is selected in such a way that the packetization

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Configuring Pseudowire

delay is always 1 millisecond. For example, a structured CEM channel of 16xDS0 has a default payload size of 128 bytes.

The payload size must be an integer of the multiple of the number of time slots for structured CEM channels.

Setting the Dejitter Buffer Size

To specify the size of the dejitter buffer used to compensate for the network filter, use the dejitter-buffer size command. The configured dejitter buffer size is converted from milliseconds to packets and rounded up to the next integral number of packets. Use the size argument to specify the size of the buffer, in milliseconds. The range is from 1 to 32 ms; the default is 5 ms.

Setting an Idle Pattern (Optional)

To specify an idle pattern, use the [no] idle-pattern pattern1 command. The payload of each lost CESoPSN data packet must be replaced with the equivalent amount of the replacement data. The range for pattern is from 0x0 to 0xFF; the default idle pattern is 0xFF.

Configuring CEM Parameters

Enabling Dummy Mode

Dummy mode enables a bit pattern for filling in for lost or corrupted frames. To enable dummy mode, use the dummy-mode [last-frame | user-defined] command. The default is last-frame. The following is an example:

Router(config-cem)# dummy-mode last-frame

Setting a Dummy Pattern

If dummy mode is set to user-defined, you can use the dummy-pattern pattern command to configure the dummy pattern. The range for pattern is from 0x0 to 0xFF. The default dummy pattern is 0xFF. The following is an example:

Router(config-cem)# dummy-pattern 0x55

Note

The dummy-pattern command is not supported on the following interface modules:

48-Port T3/E3 CEM interface module

•

48-Port T1/E1 CEM interface module

•

1-port OC-192 Interface module or 8-port Low Rate interface module

•

Shutting Down a CEM Channel

To shut down a CEM channel, use the shutdown command in CEM configuration mode. The shutdown command is supported only under CEM mode and not under the CEM class.

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Configuring CAS

This section provides information about how to configure Channel Associated Signaling (CAS).

Information About CAS

The CAS is a method of signaling, where the signaling information is carried over a signaling resource that is specific to a particular channel. For each channel there is a dedicated and associated signaling channel.

The Cisco ASR Router with RSP2 module supports CAS with 8-port T1/E1 interface modules and is interoperable with 6-port Ear and Mouth (E&M) interface modules.

Configuring Pseudowire

Note

The Cisco ASR Router supports CAS only in the E1 mode for the 8-port T1/E1 interface cards. Use the card type e1 slot/subslot command to configure controller in the E1 mode.

In the E1 framing and signaling, each E1 frame supports 32 timeslots or channels. From the available timeslots, the timeslot 17 is used for signaling information and the remaining timeslots are used for voice and data. Hence, this kind of signaling is often referred as CAS.

In the E1 frame, the timeslots are numbered from 1 to 32, where the timeslot 1 is used for frame synchronization and is unavailable for traffic. When the first E1 frame passes through the controller, the first four bits of signaling channel (timeslot 17) are associated with the timeslot 2 and the second four bits are associated with the timeslot 18. In the second E1 frame, the first four bits carry signaling information for the timeslot 3 and the second four bits for the timeslot 19.

Configuring CAS

To configure CAS on the controller interface, perform the following steps:

SUMMARY STEPS

configure terminal

controller e1 slot/subslot/port

cas

clock source internal

cem-group group-numbertimeslots time-slot-range

end

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Configuring Pseudowire

DETAILED STEPS

Configuring CAS

PurposeCommand or Action

Step 1

Step 2

Step 3

Step 4

Step 5

Example:

Router# configure terminal

controller e1 slot/subslot/port

Example:

Router(config)# controller E1 0/4/2

Example:

Router(config-controller)# cas

Example:

Router(config-controller)# clock source

internal

cem-group group-numbertimeslots time-slot-range

Enters the global configuration mode.configure terminal

Enters controller configuration mode to configure the E1 interface.

Note

The CAS is supported only in the El mode. Use the card type e1 slot/subslot command to configure controller in the E1

mode.

Configures CAS on the interface.cas

Sets the clocking for individual E1 links.clock source internal

Creates a Circuit Emulation Services over Packet Switched Network circuit emulation (CESoPSN) CEM group.

Step 6

Example:

Router(config-controller)# cem-group 0 timeslots 1-31

Example:

Router(config-controller)# end

• cem-group—Creates a circuit emulation (CEM) channel from one

or more time slots of a E1 line.

• group-number—CEM identifier to be used for this group of time

slots. For E1 ports, the range is from 0 to 30.

• timeslots—Specifies that a list of time slots is to be used as

specified by the time-slot-range argument.

• time-slot-range—Specifies the time slots to be included in the

CEM channel. The list of time slots may include commas and hyphens with no spaces between the numbers.

Exits the controller session and returns to the configuration mode.end

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Verifying CAS Configuration

What to Do Next

You can configure CEM interface and parameters such as xconnect.

Verifying CAS Configuration

Use the show cem circuit cem-group-id command to display CEM statistics for the configured CEM circuits. If xconnect is configured under the circuit, the command output also includes information about the attached circuit.

Following is a sample output of the show cem circuit command to display the detailed information about CEM circuits configured on the router:

Router# show cem circuit 0 CEM0/3/0, ID: 0, Line: UP, Admin: UP, Ckt: ACTIVE Controller state: up, T1/E1 state: up Idle Pattern: 0xFF, Idle CAS: 0x8 Dejitter: 8 (In use: 0) Payload Size: 32 Framing: Framed (DS0 channels: 1) CEM Defects Set None

Signalling: No CAS RTP: No RTP

Ingress Pkts: 5001 Dropped: 0 Egress Pkts: 5001 Dropped: 0

CEM Counter Details Input Errors: 0 Output Errors: 0 Pkts Missing: 0 Pkts Reordered: 0 Misorder Drops: 0 JitterBuf Underrun: 0 Error Sec: 0 Severly Errored Sec: 0 Unavailable Sec: 0 Failure Counts: 0 Pkts Malformed: 0 JitterBuf Overrun: 0

Configuring Pseudowire

Note

The show cem circuit command displays No CAS for the Signaling field. The No CAS is displayed since CAS is not enabled at the CEM interface level. The CAS is enabled for the entire port and you cannot enable or disable CAS at the CEM level. To view the CAS configuration, use the show running-config command.

Configuration Examples for CAS

The following example shows how to configure CAS on a CEM interface on the router:

Router# configure terminal Router(config)# controller E1 0/4/2 Router(config-controller)# cas Router(config-controller)# clock source internal Router(config-controller)# cem-group 0 timeslots 1 Router(config-controller)# exit

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Configuring Pseudowire

Configuring ATM

The following sections describe how to configure ATM features on the T1/E1 interface module:

Configuring a Clear-Channel ATM Interface

To configure the T1 interface module for clear-channel ATM, follow these steps:

SUMMARY STEPS

enable

configure terminal

controller {t1} slot/subslot/port

atm

end

Configuring ATM

DETAILED STEPS

Step 1

Step 2

Step 3

Step 4

Step 5

Example:

Router> enable

Example:

Router# configure terminal

controller {t1} slot/subslot/port

Example:

Router(config)# controller t1 0/3/0

atm

Example:

Router(config-controller)# atm

PurposeCommand or Action

Enables privileged EXEC mode.enable

Enter your password if prompted.

•

Enters global configuration mode.configure terminal

Selects the T1 controller for the port you are configuring (where slot /subslot identifies the location and /port identifies the port).

Configures the port (interface) for clear-channel ATM. The router creates an ATM interface whose format is atm/slot /subslot /port .

Note

The slot number is always

Exits configuration mode.end

Example:

Router(config-controller)# end

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Configuring ATM IMA

What to Do Next

To access the new ATM interface, use the interface atmslot/subslot/port command.

This configuration creates an ATM interface that you can use for a clear-channel pseudowire and other features. For more information about configuring pseudowires, see Configuring Pseudowire, on page 1

Configuring ATM IMA

Inverse multiplexing provides the capability to transmit and receive a single high-speed data stream over multiple slower-speed physical links. In Inverse Multiplexing over ATM (IMA), the originating stream of ATM cells is divided so that complete ATM cells are transmitted in round-robin order across the set of ATM links. Follow these steps to configure ATM IMA on the Cisco ASR 903 Series Router.

Configuring Pseudowire

Note

SUMMARY STEPS

ATM IMA is used as an element in configuring ATM over MPLS pseudowires. For more information about configuring pseudowires, see Configuring Pseudowire, on page 1

The maximum ATM over MPLS pseudowires supported per T1/E1 interface module is 500.Note

To configure the ATM interface on the router, you must install the ATM feature license using the license install atm command. To activate or enable the configuration on the IMA interface after the ATM license is installed, use the license feature atm command.

For more information about installing licenses, see the Software Activation Configuration Guide, Cisco IOS

XE Release 3S.

You can create a maximum of 16 IMA groups on each T1/E1 interface module.Note

enable

configure terminal

card type {t1 | e1} slot [bay]

controller {t1 | e1} slot/subslot/port

clock source internal

ima group group-number

exit

interface ATMslot/subslot/IMA group-number

no ip address

atm bandwidth dynamic

10.

no atm ilmi-keepalive

11.

exit

12.

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Configuring Pseudowire

DETAILED STEPS

Configuring ATM IMA

PurposeCommand or Action

Step 1

Step 2

Step 3

Step 4

Step 5

Example:

Router> enable

Example:

Router# configure terminal

card type {t1 | e1} slot [bay]

Example:

Router(config)# card type e1 0 0

controller {t1 | e1} slot/subslot/port

Example:

Router(config)# controller e1 0/0/4

Example:

Enables privileged EXEC mode.enable

Enter your password if prompted.

•

Enters global configuration mode.configure terminal

Specifies the slot and port number of the E1 or T1 interface.

Specifies the controller interface on which you want to enable IMA.

Sets the clock source to internal.clock source internal

Step 6

Step 7

Example:

Router(config-controller)# clock source

internal

Example:

ima group group-number

Example:

Router(config-controller)# ima-group 0 scrambling-payload

Example:

Router(config-controller)# exit

Assigns the interface to an IMA group, and set the scrambling-payload parameter to randomize the ATM cell payload frames. This command assigns the interface to IMA group 0.

Note

To add another member link, repeat Step 3 to Step 6 .

This command automatically creates an ATM0/IMAx interface.

Exits the controller interface.exit

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Configuring ATM IMA

Example:

Configuring Pseudowire

PurposeCommand or Action

Step 8

Step 9

Step 10

interface ATMslot/subslot/IMA group-number

Example:

Router(config-if)# interface atm0/1/ima0

Example:

Router(config-if)# no ip address

Example:

Specify the slot location and port of IMA interface group.

• slot—The location of the ATM IMA interface module.

• group-number—The IMA group.

The example specifies the slot number as 0 and the group number as 0.

Note

To explicitly configure the IMA group ID for the IMA interface, use the optional ima group-id command. You cannot configure the same IMA group ID on two different IMA interfaces; therefore, if you configure an IMA group ID with the system-selected default ID already configured on an IMA interface, the system toggles the IMA interface to make the user-configured IMA group ID the effective IMA group ID. The system toggles the original IMA interface to select a different IMA group ID.

Disables the IP address configuration for the physical layer interface.no ip address

Specifies the ATM bandwidth as dynamic.atm bandwidth dynamic

Step 11

Step 12

Router(config-if)# atm bandwidth dynamic

no atm ilmi-keepalive

Disables the Interim Local Management Interface (ILMI) keepalive parameters.

Example:

Router(config-if)# no atm ilmi-keepalive

Exits configuration mode.exit

Example:

Router(config)# exit

What to Do Next

The above configuration has one IMA shorthaul with two member links (atm0/0 and atm0/1).

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Configuring Pseudowire

BGP PIC with TDM Configuration

To configure the TDM pseudowires on the router, see Configuring CEM, on page 8.

To configure BGP PIC on the router, see IP Routing: BGP Configuration Guide, Cisco IOS XE Release 3S

(Cisco ASR 900 Series).

See the configuration example, Example: BGP PIC with TDM Configuration, on page 45.

Configuring Structure-Agnostic TDM over Packet (SAToP)

Follow these steps to configure SAToP on the Cisco ASR 903 Series Router:

SUMMARY STEPS

enable

configure terminal

controller [t1|e1] slot/sublot

cem-group group-number {unframed | timeslots timeslot}

interface cem slot/subslot

xconnect ip_address encapsulation mpls

exit

DETAILED STEPS

Step 1

Step 2

Step 3

Step 4

Example:

Router> enable

Example:

Router# configure terminal

controller [t1|e1] slot/sublot

Example:

Router(config-controller)# controller t1 0/4

cem-group group-number {unframed | timeslots timeslot}

Example:

Router(config-if)# cem-group 4 unframed

PurposeCommand or Action

Enables privileged EXEC mode.enable

Enter your password if prompted.

•

Enters global configuration mode.configure terminal

Configures the T1 or E1 interface.

Assigns channels on the T1 or E1 circuit to the CEM channel. This example uses the unframed parameter to assign all the T1 timeslots to the CEM channel.

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Configuring Structure-Agnostic TDM over Packet (SAToP)

Configuring Pseudowire

PurposeCommand or Action

Step 5

Step 6

Step 7

interface cem slot/subslot

Example:

Router(config)# interface CEM 0/4

Example:

Router(config-if)# no ip address

Example:

Router(config-if)# cem 4

xconnect ip_address encapsulation mpls

Example:

Router(config-if)# xconnect 10.10.2.204 encapsulation mpls

Example:

Router(config)# exit

Defines a CEM group.

Binds an attachment circuit to the CEM interface to create a pseudowire. This example creates a pseudowire by binding the CEM circuit 304 to the remote peer

10.10.2.204.

Exits configuration mode.exit

Note

What to Do Next

When creating IP routes for a pseudowire configuration, we recommend that you build a route from the cross-connect address (LDP router-id or loopback address) to the next hop IP address, such as ip route

10.10.10.2 255.255.255.254 10.2.3.4.

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Configuring Pseudowire

Configuring Circuit Emulation Service over Packet-Switched Network (CESoPSN)

SUMMARY STEPS

enable

configure terminal

controller [e1 | t1] slot/subslot

cem-group group-number timselots timeslots

exit

interface cem slot/subslot

xconnect ip_address encapsulation mpls

exit

DETAILED STEPS

Step 1

Step 2

Step 3

Step 4

Example:

Router> enable

Example:

Router# configure terminal

controller [e1 | t1] slot/subslot

Example:

Router(config)# controller e1 0/0

Example:

cem-group group-number timselots timeslots

Example:

PurposeCommand or Action

Enables privileged EXEC mode.enable

Enter your password if prompted.

•

Enters global configuration mode.configure terminal

Enters configuration mode for the E1 or T1 controller.

Assigns channels on the T1 or E1 circuit to the circuit emulation (CEM) channel. This example uses the timeslots parameter to assign specific timeslots to the CEM channel.

Router(config-controller)# cem-group 5 timeslots 1-24

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Configuring a Clear-Channel ATM Pseudowire

Configuring Pseudowire

PurposeCommand or Action

Step 5

Step 6

Step 7

Step 8

Example:

Router(config-controller)# exit

interface cem slot/subslot

Example:

Router(config)# interface CEM0/5

Example:

Router(config-if-cem)# cem 5

Example:

xconnect ip_address encapsulation mpls

Example:

Router(config-if)# xconnect 10.10.2.204 encapsulation mpls

Exits controller configuration.exit

Defines a CEM channel.

Binds an attachment circuit to the CEM interface to create a pseudowire. This example creates a pseudowire by binding the CEM circuit 304 to the remote peer

10.10.2.204.

Exits the CEM interface.exit

Example:

Router(config-if-cem)# exit

Step 9

Example:

Router(config)# exit

Exits configuration mode.exit

Configuring a Clear-Channel ATM Pseudowire

To configure the T1 interface module for clear-channel ATM, follow these steps:

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Configuring Pseudowire

SUMMARY STEPS

DETAILED STEPS

Configuring a Clear-Channel ATM Pseudowire

controller {t1} slot/subslot/port

atm

exit

interface atm slot/subslot/port

pvc vpi/vci

xconnect peer-router-id vcid {encapsulation mpls | pseudowire-class name

end

PurposeCommand or Action

Step 1

Step 2

Step 3

Step 4

Step 5

controller {t1} slot/subslot/port

Example:

Router(config)# controller t1 0/4

atm

Example:

Router(config-controller)# atm

Example:

Router(config-controller)# exit

interface atm slot/subslot/port

Example:

Router(config)# interface atm 0/3/0

pvc vpi/vci

Example:

Selects the T1 controller for the port you are configuring.

Note

The slot number is always

Configures the port (interface) for clear-channel ATM. The router creates an ATM interface whose format is atm/slot /subslot /port .

Note

The slot number is always

Returns you to global configuration mode.exit

Selects the ATM interface in Step 2 .

Configures a PVC for the interface and assigns the PVC a VPI and VCI. Do not specify 0 for both the VPI and VCI.

Step 6

Router(config-if)# pvc 0/40

xconnect peer-router-id vcid {encapsulation mpls | pseudowire-class name

Example:

Router(config-if)# xconnect 10.10.2.204 200

encapsulation mpls

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Configures a pseudowire to carry data from the clear-channel ATM interface over the MPLS network.

Page 34

Configuring an ATM over MPLS Pseudowire

Configuring Pseudowire

PurposeCommand or Action

Step 7

Example:

Router(config-if)# end

Exits configuration mode.end

Configuring an ATM over MPLS Pseudowire

ATM over MPLS pseudowires allow you to encapsulate and transport ATM traffic across an MPLS network. This service allows you to deliver ATM services over an existing MPLS network.

The following sections describe how to configure transportation of service using ATM over MPLS:

Configuring the Controller, on page 26

•

Configuring an IMA Interface, on page 27

•

Configuring the ATM over MPLS Pseudowire Interface, on page 29

•

Configuring the Controller

SUMMARY STEPS

DETAILED STEPS

Step 1

Example:

Router> enable

enable

configure terminal

card type {e1} slot/subslot

controller {e1} slot/subslot

clock source {internal | line}

ima-group group-number scrambling-payload

exit

PurposeCommand or Action

Enables privileged EXEC mode.enable

Enter your password if prompted.

•

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Configuring Pseudowire

Configuring an IMA Interface

PurposeCommand or Action

Step 2

Step 3

Step 4

Step 5

Step 6

Example:

Router# configure terminal

card type {e1} slot/subslot

Example:

Router(config)# card type e1 0 0

controller {e1} slot/subslot

Example:

Router(config)# controller e1 0/4

Example:

Router(config-controller)# clock source

internal

ima-group group-number scrambling-payload

Example:

Router(config-controller)# ima-group 0 scrambling-payload

Enters global configuration mode.configure terminal

Configures IMA on an E1 or T1 interface.

Specifies the controller interface on which you want to enable IMA.

Sets the clock source to internal.clock source {internal | line}

If you want to configure an ATM IMA backhaul, use the ima-group command to assign the interface to an IMA group. For a T1 connection, use the no-scrambling-payload to disable ATM-IMA cell payload scrambling; for an E1 connection, use the scrambling-payload parameter to enable ATM-IMA cell payload scrambling.

The example assigns the interface to IMA group 0 and enables payload scrambling.

Step 7

Example:

Router(config)# exit

Configuring an IMA Interface

If you want to use ATM IMA backhaul, follow these steps to configure the IMA interface.

You can create a maximum of 16 IMA groups on each T1/E1 interface module.Note

Time Division Multiplexing Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco ASR 900 Series)

Exits configuration mode.exit

Page 36

Configuring an IMA Interface

SUMMARY STEPS

DETAILED STEPS

enable

configure terminal

interface ATM slot / IMA group-number

no ip address

atm bandwidth dynamic

no atm ilmi-keepalive

exit

Configuring Pseudowire

PurposeCommand or Action

Step 1

Step 2

Step 3

Step 4

Example:

Router> enable

Example:

Router# configure terminal

interface ATM slot / IMA group-number

Example:

Router(config-controller)# interface

atm0/ima0

Example:

Router(config-if)#

Enables privileged EXEC mode.enable

Enter your password if prompted.

•

Enters global configuration mode.configure terminal

Specifies the slot location and port of IMA interface group. The syntax is as follows:

• slot—The slot location of the interface module.

• group-number—The group number of the IMA group.

The example specifies the slot number as 0 and the group number as 0.

Note

To explicitly configure the IMA group ID for the IMA interface, you may use the optional ima group-id command. You cannot configure the same IMA group ID on two different IMA interfaces; therefore, if you configure an IMA group ID with the system-selected default ID already configured on an IMA interface, the system toggles the IMA interface to make the user-configured IMA group ID the effective IMA group ID. At the same, the system toggles the original IMA interface to select a different IMA group ID.

Disables the IP address configuration for the physical layer interface.no ip address

Example:

Router(config-if)# no ip address

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Configuring Pseudowire

Configuring the ATM over MPLS Pseudowire Interface

PurposeCommand or Action

Step 5

Step 6

Step 7

Specifies the ATM bandwidth as dynamic.atm bandwidth dynamic

Example:

Router(config-if)# atm bandwidth dynamic

Disables the ILMI keepalive parameters.no atm ilmi-keepalive

Example:

Router(config-if)# no atm ilmi-keepalive

Exits configuration mode.exit

Example:

Router(config)# exit

What to Do Next

For more information about configuring IMA groups, see the Configuring ATM IMA, on page 18.

Configuring the ATM over MPLS Pseudowire Interface

You can configure ATM over MPLS is several modes according to the needs of your network. Use the appropriate section according to the needs of your network. You can configure the following ATM over MPLS pseudowire types:

• Configuring 1-to-1 VCC Cell Transport Pseudowire, on page 30—Maps a single VCC to a single

pseudowire

• Configuring N-to-1 VCC Cell Transport Pseudowire , on page 31—Maps multiple VCCs to a single

pseudowire

• Configuring 1-to-1 VPC Cell Transport, on page 31—Maps a single VPC to a single pseudowire

• Configuring ATM AAL5 SDU VCC Transport, on page 33—Maps a single ATM PVC to another

ATM PVC

• Configuring a Port Mode Pseudowire, on page 35—Maps one physical port to a single pseudowire

connection

Optional Configurations, on page 36

•

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Configuring the ATM over MPLS Pseudowire Interface

Configuring Pseudowire

Note

When creating IP routes for a pseudowire configuration, build a route from the xconnect address (LDP router-id or loopback address) to the next hop IP address, such as ip route 10.10.10.2 255.255.255.255

10.2.3.4.

Configuring 1-to-1 VCC Cell Transport Pseudowire

A 1-to-1 VCC cell transport pseudowire maps one ATM virtual channel connection (VCC) to a single pseudowire. Complete these steps to configure a 1-to-1 pseudowire.

Multiple 1-to-1 VCC pseudowire mapping on an interface is supported.Note

Mapping a Single PVC to a Pseudowire

To map a single PVC to an ATM over MPLS pseudowire, use the xconnect command at the PVC level. This configuration type uses AAL0 and AAL5 encapsulations. Complete these steps to map a single PVC to an ATM over MPLS pseudowire.

SUMMARY STEPS

enable

configure terminal

interface ATM slot / IMA group-number

pvc slot/subslot l2transport

encapsulation aal0

xconnect router_ip_address vcid encapsulation mpls

end

DETAILED STEPS

Step 1

Step 2

Time Division Multiplexing Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco ASR 900 Series)

Example:

Router> enable

Example:

Router# configure terminal

PurposeCommand or Action

Enables privileged EXEC mode.enable

Enter your password if prompted.

•

Enters global configuration mode.configure terminal

Page 39

Configuring Pseudowire

Configuring the ATM over MPLS Pseudowire Interface

PurposeCommand or Action

Step 3

Step 4

Step 5

Step 6

Step 7

interface ATM slot / IMA group-number

Example:

Router(config-controller)# interface atm0/ima0

pvc slot/subslot l2transport

Example:

Router(config-if-atm)# pvc 0/40 l2transport

encapsulation aal0

Example:

Router(config-if-atm-l2trans-pvc)# encapsulation

aal0

xconnect router_ip_address vcid encapsulation mpls

Example:

Router(config-if-atm-l2trans-pvc)# xconnect

1.1.1.1 40 encapsulation mpls

Example:

Configures the ATM IMA interface.

Defines a PVC. Use the l2transport keyword to configure the PVC as a layer 2 virtual circuit.

Defines the encapsulation type for the PVC. The default encapsulation type for the PVC is AAL5.

Binds an attachment circuit to the ATM IMA interface to create a pseudowire. This example creates a pseudowire by binding PVC 40 to the remote peer 1.1.1.1.

Exits configuration mode.end

Router(config-if-atm-l2trans-pvp-xconn)# end

Configuring N-to-1 VCC Cell Transport Pseudowire

An N-to-1 VCC cell transport pseudowire maps one or more ATM virtual channel connections (VCCs) to a single pseudowire. Complete these steps to configure an N-to-1 pseudowire.

Configuring 1-to-1 VPC Cell Transport

A 1-to-1 VPC cell transport pseudowire maps one or more virtual path connections (VPCs) to a single pseudowire. While the configuration is similar to 1-to-1 VPC cell mode, this transport method uses the 1-to-1 VPC pseudowire protocol and format defined in RFCs 4717 and 4446. Complete these steps to configure a 1-to-1 VPC pseudowire.

Multiple 1-to-1 VCC pseudowire mapping on an interface is supported.Note

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Configuring the ATM over MPLS Pseudowire Interface

SUMMARY STEPS

enable

configure terminal

interface ATM slot / IMA group-number

atm pvp vpi l2transport

xconnect peer-router-id vcid {encapsulation mpls

end

DETAILED STEPS

Configuring Pseudowire

PurposeCommand or Action

Step 1

Step 2

Step 3

Step 4

Example:

Router> enable

Example:

Router# configure terminal

interface ATM slot / IMA group-number

Example:

Router(config-controller)# interface atm0/ima0

Example:

Router(config-if)#

Example:

atm pvp vpi l2transport

Example:

Enables privileged EXEC mode.enable

Enter your password if prompted.

•

Enters global configuration mode.configure terminal

Configures the ATM IMA interface.

Maps a PVP to a pseudowire.

Router(config-if-atm)# atm pvp 10 l2transport

Example:

Router(config-if-atm-l2trans-pvp)#

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Configuring Pseudowire

Configuring the ATM over MPLS Pseudowire Interface

PurposeCommand or Action

Step 5

xconnect peer-router-id vcid {encapsulation mpls

Example:

Router(config-if-atm-l2trans-pvp)# xconnect 10.10.10.2

305 encapsulation mpls

Example:

Router(config-if-atm-l2trans-pvp-xconn)#

Step 6

Example:

Router(config-if-atm-l2trans-pvp-xconn)# end

Example:

Configuring ATM AAL5 SDU VCC Transport

An ATM AAL5 SDU VCC transport pseudowire maps a single ATM PVC to another ATM PVC. Follow these steps to configure an ATM AAL5 SDU VCC transport pseudowire.

Binds an attachment circuit to the ATM IMA interface to create a pseudowire. This example creates a pseudowire by binding the ATM circuit 305 to the remote peer 30.30.30.2.

Exits the configuration mode.end

SUMMARY STEPS

DETAILED STEPS

Step 1

Example:

Router> enable

enable

configure terminal

interface ATM slot / IMA group-number

atm pvp vpi l2transport

encapsulation aal5

xconnect peer-router-id vcid encapsulation mpls

exit

PurposeCommand or Action

Enables privileged EXEC mode.enable

Enter your password if prompted.

•

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Configuring the ATM over MPLS Pseudowire Interface

Configuring Pseudowire

PurposeCommand or Action

Step 2

Step 3

Step 4

Example:

Router# configure terminal

interface ATM slot / IMA group-number

Example:

Router(config-controller)# interface atm0/ima0

Example:

Router(config-if)#

Example:

atm pvp vpi l2transport

Example:

Router(config-if)# pvc 0/12 l2transport

Enters global configuration mode.configure terminal

Configures the ATM IMA interface.

Configures a PVC and specifies a VCI or VPI.

Step 5

Step 6

Step 7

Example:

Router(config-if-atm-l2trans-pvc)#

Example:

Router(config-if-atm-l2trans-pvc)# encapsulation

aal5

xconnect peer-router-id vcid encapsulation mpls

Example:

Router(config-if-atm-l2trans-pvc)# xconnect

10.10.10.2 125 encapsulation mpls

Example:

Router(config)# exit

Sets the PVC encapsulation type to AAL5.encapsulation aal5

Note

You must use the AAL5 encapsulation for this transport type.

Binds an attachment circuit to the ATM IMA interface to create a pseudowire. This example creates a pseudowire by binding the ATM circuit 125 to the remote peer 25.25.25.25.

Exits configuration mode.exit

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Configuring Pseudowire

Configuring a Port Mode Pseudowire

A port mode pseudowire allows you to map an entire ATM interface to a single pseudowire connection.

SUMMARY STEPS

enable

configure terminal

interface ATM slot / IMA group-number

xconnect peer-router-id vcid encapsulation mpls

exit

DETAILED STEPS

Configuring the ATM over MPLS Pseudowire Interface

PurposeCommand or Action

Step 1

Step 2

Step 3

Example:

Router> enable

Example:

Router# configure terminal

interface ATM slot / IMA group-number

Example:

Router(config-controller)# interface atm0/ima0

Example:

Router(config-if)#

Example:

Enables privileged EXEC mode.enable

Enter your password if prompted.

•

Enters global configuration mode.configure terminal

Configures the ATM interface.

Step 4

xconnect peer-router-id vcid encapsulation mpls

Example:

Router(config-if-atm-l2trans-pvc)# xconnect

10.10.10.2 125 encapsulation mpls

Time Division Multiplexing Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco ASR 900 Series)

Binds an attachment circuit to the ATM IMA interface to create a pseudowire. This example creates a pseudowire by binding the ATM circuit 125 to the remote peer 10.10.10.2.

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Configuring the ATM over MPLS Pseudowire Interface

Configuring Pseudowire

PurposeCommand or Action

Step 5

Example:

Router(config)# exit

Optional Configurations

You can apply the following optional configurations to a pseudowire link.

Configuring Cell Packing

Cell packing allows you to improve the efficiency of ATM-to-MPLS conversion by packing multiple ATM cells into a single MPLS packet. Follow these steps to configure cell packing.

SUMMARY STEPS

Exits configuration mode.exit

enable

configure terminal

interface ATM slot / IMA group-number

atm mcpt-timers timer1 timer2 timer3

atm pvp vpi l2transport

encapsulation aal5

cell-packing maxcells mcpt-timer timer-number

end

DETAILED STEPS

Step 1

Step 2

Step 3

Time Division Multiplexing Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco ASR 900 Series)

Example:

Router> enable

Example:

Router# configure terminal

interface ATM slot / IMA group-number

Example:

Router(config-controller)# interface atm0/ima0

PurposeCommand or Action

Enables privileged EXEC mode.enable

Enter your password if prompted.

•

Enters global configuration mode.configure terminal

Configures the ATM interface.

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Configuring Pseudowire

Step 4

Example:

Router(config-if)#

atm mcpt-timers timer1 timer2 timer3

Example:

Router(config-if)# atm mcpt-timers 1000 2000

3000

Configuring an Ethernet over MPLS Pseudowire

PurposeCommand or Action

Defines the three Maximum Cell Packing Timeout (MCPT) timers under an ATM interface. The three independent MCPT timers specify a wait time before forwarding a packet.

Step 5

Step 6

Step 7

Step 8

atm pvp vpi l2transport

Example:

Router(config-if)# pvc 0/12 l2transport

Example:

Router(config-if-atm-l2trans-pvc)#

Example:

Router(config-if-atm-l2trans-pvc)# encapsulation

aal5

cell-packing maxcells mcpt-timer timer-number

Example:

Router(config-if-atm-l2trans-pvc)# cell-packing

20 mcpt-timer 3

Example:

Configures a PVC and specifies a VCI or VPI.

Sets the PVC encapsulation type to AAL5.encapsulation aal5

Note

You must use the AAL5 encapsulation for this transport type.

Specifies the maximum number of cells in PW cell pack and the cell packing timer. This example specifies 20 cells per pack and the third MCPT timer.

Exits the configuration mode.end

Router(config-if-atm-l2trans-pvc)# end

Configuring an Ethernet over MPLS Pseudowire

Ethernet over MPLS PWs allow you to transport Ethernet traffic over an existing MPLS network. The router supports EoMPLS pseudowires on EVC interfaces.

For more information about Ethernet over MPLS Pseudowires, see Transportation of Service Using Ethernet

over MPLS, on page 7.

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Configuring an Ethernet over MPLS Pseudowire

SUMMARY STEPS

enable

configure terminal

interface interface-id

service instance number ethernet [name]

encapsulation {default | dot1q | priority-tagged | untagged}

xconnect peer-ip-address vc-id {encapsulation {l2tpv3 [manual] | mpls [manual]} | pw-class

pw-class-name }[pw-class pw-class-name] [sequencing {transmit | receive | both}]

exit

DETAILED STEPS

Configuring Pseudowire

PurposeCommand or Action

Step 1

Step 2

Step 3

Step 4

Step 5

Example:

Router> enable

Example:

Router# configure terminal

interface interface-id

Example:

Router(config)# interface gigabitethernet 0/0/4

service instance number ethernet [name]

Example:

Router(config-if)# service instance 2

ethernet

priority-tagged | untagged}

Enables privileged EXEC mode.enable

Enter your password if prompted.

•

Enters global configuration mode.configure terminal

Specifies the port on which to create the pseudowire and enters interface configuration mode. Valid interfaces are physical Ethernet ports.

Configure an EFP (service instance) and enter service instance configuration) mode.

The number is the EFP identifier, an integer from 1 to 4000.

•

(Optional) ethernet name is the name of a previously configured

•

EVC. You do not need to use an EVC name in a service instance.

Note

You can use service instance settings such as encapsulation, dot1q, and rewrite to configure tagging properties for a specific traffic flow within a given pseudowire session. For more information, see http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/cether/

configuration/xe-3s/asr903/ce-xe-3s-asr903-book/ce-evc.html

Configure encapsulation type for the service instance.encapsulation {default | dot1q |

• default—Configure to match all unmatched packets.

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Configuring Pseudowire

Example:

Router(config-if-srv)# encapsulation dot1q 2

Configuring Pseudowire Redundancy

PurposeCommand or Action

• dot1q—Configure 802.1Q encapsulation.

• priority-tagged—Specify priority-tagged frames, VLAN-ID 0 and

CoS value of 0 to 7.

• untagged—Map to untagged VLANs. Only one EFP per port can

have untagged encapsulation.

Step 6

xconnect peer-ip-address vc-id

{encapsulation {l2tpv3 [manual] | mpls [manual]} | pw-class pw-class-name }[pw-class pw-class-name] [sequencing {transmit | receive | both}]

Binds the Ethernet port interface to an attachment circuit to create a pseudowire. This example uses virtual circuit (VC) 101 to uniquely identify the PW. Ensure that the remote VLAN is configured with the same VC.

Note

When creating IP routes for a pseudowire configuration, we recommend that you build a route from the xconnect address (LDP router-id or loopback address) to the next hop IP address, such

Step 7

Example:

Router (config-if-srv)# xconnect

10.1.1.2 101 encapsulation mpls

Exits configuration mode.exit

Example:

Router(config)# exit

as ip route 10.10.10.2 255.255.255.255 10.2.3.4.

Configuring Pseudowire Redundancy

A backup peer provides a redundant pseudowire (PW) connection in the case that the primary PW loses connection; if the primary PW goes down, the Cisco ASR 903 Series Router diverts traffic to the backup PW. This feature provides the ability to recover from a failure of either the remote PE router or the link between the PE router and CE router.

Figure 3: Pseudowire Redundancy, on page 39 shows an example of pseudowire redundancy.

Figure 3: Pseudowire Redundancy

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Configuring Pseudowire Redundancy

Configuring Pseudowire

Note

SUMMARY STEPS

DETAILED STEPS

Step 1

You must configure the backup pseudowire to connect to a router that is different from the primary pseudowire.

Follow these steps to configure a backup peer:

enable

configure terminal

pseudowire-class [pw-class-name]

encapsulation mpls

interface serial slot/subslot/port

backup delay enable-delay {disable-delay | never}

xconnect router-id encapsulation mpls

backup peer peer-router-ip-address vcid [pw-class pw-class name]

exit

PurposeCommand or Action

Enables privileged EXEC mode.enable

Step 2

Step 3

Step 4

Step 5

Example:

Router> enable

Example:

Router# configure terminal

pseudowire-class [pw-class-name]

Example:

Router(config)# pseudowire-class mpls

Example:

Router(config-pw-class)# encapsulation mpls

interface serial slot/subslot/port

Example:

Router(config)# interface serial0/0

Enter your password if prompted.

•

Enters global configuration mode.configure terminal

Specify the name of a Layer 2 pseudowire class and enter pseudowire class configuration mode.

Specifies MPLS encapsulation.encapsulation mpls

Enters configuration mode for the serial interface.

Note

The slot number is always

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Configuring Pseudowire

Pseudowire Redundancy with Uni-directional Active-Active

PurposeCommand or Action

Step 6

Step 7

Step 8

Step 9

backup delay enable-delay {disable-delay | never}

Example:

Router(config)# backup delay 0 10

xconnect router-id encapsulation mpls

Example:

Router(config-if)# xconnect 10.10.10.2 101

encapsulation mpls

backup peer peer-router-ip-address vcid [pw-class

pw-class name]

Example:

Router(config)# backup peer 10.10.10.1 104 pw-class pw1

Configures the backup delay parameters.

Where:

• enable-delay—Time before the backup PW takes over

for the primary PW.

• disable-delay—Time before the restored primary PW

takes over for the backup PW.

• never—Disables switching from the backup PW to

the primary PW.

Binds the Ethernet port interface to an attachment circuit to create a pseudowire.

Defines the address and VC of the backup peer.

Exits configuration mode.exit

Example:

Router(config)# exit

Pseudowire Redundancy with Uni-directional Active-Active

Pseudowire redundancy with uni-directional active-active feature configuration allows, pseudowires (PW) on both the working and protect circuits to remain in UP state to allow traffic to flow from the upstream. The aps l2vpn-state detach command and redundancy all-active replicate command is introduced to configure uni-directional active-active pseudowire redundancy.

In pseudowire redundancy Active-Standby mode, the designation of the active and standby pseudowires is decided either by the endpoint PE routers or by the remote PE routers when configured with MR-APS. The active and standby routers communicate via Protect Group Protocol (PGP) and synchronize their states. The

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Restrictions

Configuring Pseudowire

PEs are connected to a Base Station Controller (BSC). APS state of the router is communicated to the Layer2 VPN, and is therby coupled with the pseudowire status .

Figure 4: Pseudowire Redundancy with MR-APS

BSC monitors the status of the incoming signal from the working and protect routers. In the event of a swithover at the BSC, the BSC fails to inform the PE routers, hence causing traffic drops.

With pseudowire redundancy Active-Active configuration, the traffic from the upstream is replicated and transmitted over both the primary and backup pseudowires. PE routers forwards the received traffic to the working and protect circuits. The BSC receives the same traffic on both the circuits and selects the better Rx link, ensuring the traffic is not dropped.

Note

Figure 5: Pseudowire Redundancy with Uni-directional Active-Active

If teh ASR 900 router is configured with the aps l2vpn-state detach command but, the ASR 901 router is not enabled with redundancy all-active replicate command, the protect PW is active after APS switchover. On the ASR 901 router, the PW state is UP and the data path status displays standby towards protect node. On an APS switchover on the ASR 900 router, the status is not communicated to ASR 901 router, and the VC data path state towards the protect node remains in the standby state.

Restrictions

The following restrictions apply on the router:

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Configuring Pseudowire

Configuring Pseudowire Redundancy Active-Active— Protocol Based

If the aps l2vpn-state detach command is enabled on the ASR 900 router, but the redundancy all-active

•

replicate command not enabled on the ASR 901 router, the pseudowire status on the router displays UP, and the data path status for the protect node state displays Standby.

After APS switchover on the ASR 900 router, the status is not communicated to ASR 901 router, and

•

the virtual circuit data path state towards the protect node remains in the Standby state.

The aps l2vpn-state detach command takes effect after a controller shutdown command, followed by

•

a no shutown command is performed. Alternately, the command can be configured when the controller is in shut state.

The status peer topology dual-homed command in pseudowire-class configuration mode should not

•

be configured on the ASR 900 router, irrespective of unidirectional or bidirectional mode. The command must be configured on the ASR 901 router.

Traffic outages from the BSC to the BTS on PGP and ICRM failures at the working Active node, is

•

same as the configured hold time.

Note

Convergence may be observed on performing a power cycle on the Active (whether on the protect or

•

working) node. The observed convergence is same as the configured hold time.

APS switchover may be observed on the protect node, when PGP failure occurs on the working Active node.

Configuring Pseudowire Redundancy Active-Active— Protocol Based

encapsulation mpls status peer topology dual-homed

controller E1 0/1 framing unframed cem-group 8 unframed

Configuring the Working Controller for MR-APS with Pseudowire Redundancy Active-Active

The following configuration shows pseudowire redundancy active-active for MR-APS working controller:

controller sonet 0/1/0 aps group 2 aps adm aps working 1 aps timers 1 3 aps l2vpn-state detach aps hspw-icrm-grp 1

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Configuring Pseudowire

Configuring the Protect Controller for MR-APS with Pseudowire Redundancy Active-Active

Following example shows pseudowire redundancy active-active on MR-APS protect controller:

controller sonet 0/1/0 aps group 2 aps adm aps unidirectional aps protect 10 10.10.10.1 aps timers 1 3 aps l2vpn-state detach aps hspw-icrm-grp 1

Verifying the Interface Configuration

You can use the following commands to verify your pseudowire configuration:

• show cem circuit—Displays information about the circuit state, administrative state, the CEM ID of

the circuit, and the interface on which it is configured. If xconnect is configured under the circuit, the command output also includes information about the attached circuit.

Router# show cem circuit

<0-504> CEM ID detail Detailed information of cem ckt(s) interface CEM Interface summary Display summary of CEM ckts | Output modifiers

Router# show cem circuit

CEM Int. ID Line Admin Circuit AC

-------------------------------------------------------------CEM0/1/0 1 UP UP ACTIVE --/-CEM0/1/0 2 UP UP ACTIVE --/-CEM0/1/0 3 UP UP ACTIVE --/-CEM0/1/0 4 UP UP ACTIVE --/-CEM0/1/0 5 UP UP ACTIVE --/--

show cem circuit—Displays the detailed information about that particular circuit.

•

Router# show cem circuit 1

CEM0/1/0, ID: 1, Line State: UP, Admin State: UP, Ckt State: ACTIVE Idle Pattern: 0xFF, Idle cas: 0x8, Dummy Pattern: 0xFF Dejitter: 5, Payload Size: 40 Framing: Framed, (DS0 channels: 1-5) Channel speed: 56 CEM Defects Set Excessive Pkt Loss RatePacket Loss Signalling: No CAS Ingress Pkts: 25929 Dropped: 0 Egress Pkts: 0 Dropped: 0 CEM Counter Details Input Errors: 0 Output Errors: 0 Pkts Missing: 25927 Pkts Reordered: 0 Misorder Drops: 0 JitterBuf Underrun: 1 Error Sec: 26 Severly Errored Sec: 26

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Configuring Pseudowire

Unavailable Sec: 5 Failure Counts: 1 Pkts Malformed: 0

• show cem circuit summary—Displays the number of circuits which are up or down per interface basis.

Router# show cem circuit summary

CEM Int. Total Active Inactive

-------------------------------------CEM0/1/0 5 5 0

• show running configuration—The show running configuration command shows detail on each CEM

group.

Configuration Examples

The following sections contain sample pseudowire configurations.

Configuration Examples

Example: CEM Configuration

The following example shows how to add a T1 interface to a CEM group as a part of a SAToP pseudowire configuration. For more information about how to configure pseudowires, see Configuring Pseudowire, on

page 1

This section displays a partial configuration intended to demonstrate a specific feature.Note

controller T1 0/0/0

framing unframed clock source internal linecode b8zs cablelength short 110 cem-group 0 unframed

interface CEM0/0/0

no ip address cem 0

xconnect 18.1.1.1 1000 encapsulation mpls

Example: BGP PIC with TDM Configuration

CEM Configuration

pseudowire-class pseudowire1 encapsulation mpls control-word no status control-plane route-watch ! controller SONET 0/2/3 description connected to CE2 SONET 4/0/0 framing sdh clock source line aug mapping au-4 ! au-4 1 tug-3 1

mode c-12

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Example: BGP PIC with TDM-PW Configuration

tug-2 1 e1 1 cem-group 1101 unframed tug-2 1 e1 1 framing unframed tug-2 1 e1 2 cem-group 1201 timeslots 1-10

au-4 1 tug-3 2

mode c-12 tug-2 5 e1 1 cem-group 1119 unframed tug-2 5 e1 1 framing unframed tug-2 5 e1 2 cem-group 1244 timeslots 11-20

au-4 1 tug-3 3

mode c-12 tug-2 5 e1 3 cem-group 1130 unframed tug-2 5 e1 3 framing unframed

tug-2 7 e1 3 cem-group 1290 timeslots 21-30 ! interface CEM0/2/3 no ip address cem 1101

xconnect 17.1.1.1 1101 encapsulation mpls pw-class pseudowire1

cem 1201

xconnect 17.1.1.1 1201 encapsulation mpls pw-class pseudowire1

cem 1119

xconnect 17.1.1.1 1119 encapsulation mpls pw-class pseudowire1

cem 1244

xconnect 17.1.1.1 1244 encapsulation mpls pw-class pseudowire1

cem 1130

xconnect 17.1.1.1 1130 encapsulation mpls pw-class pseudowire1

cem 1290

xconnect 17.1.1.1 1290 encapsulation mpls pw-class pseudowire1

Configuring Pseudowire

BGP PIC Configuration

cef table output-chain build favor convergence-speed ! router bgp 1 bgp log-neighbor-changes bgp graceful-restart neighbor 18.2.2.2 remote-as 1 neighbor 18.2.2.2 update-source Loopback0 neighbor 18.3.3.3 remote-as 1 neighbor 18.3.3.3 update-source Loopback0 ! address-family ipv4

bgp additional-paths receive

bgp additional-paths install

bgp nexthop trigger delay 0

network 17.5.5.5 mask 255.255.255.255

neighbor 18.2.2.2 activate

neighbor 18.2.2.2 send-community both

neighbor 18.2.2.2 send-label

neighbor 18.3.3.3 activate

neighbor 18.3.3.3 send-community both

neighbor 18.3.3.3 send-label exit-address-family

Example: BGP PIC with TDM-PW Configuration

This section lists the configuration examples for BGP PIC with TDM and TDM–Pseudowire.

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Configuring Pseudowire

Example: ATM IMA Configuration

The below configuration example is for BGP PIC with TDM:

router bgp 1 neighbor 18.2.2.2 remote-as 1 neighbor 18.2.2.2 update-source Loopback0 neighbor 18.3.3.3 remote-as 1 neighbor 18.3.3.3 update-source Loopback0 ! address-family ipv4

bgp additional-paths receive bgp additional-paths install

bgp nexthop trigger delay 6

neighbor 18.2.2.2 activate neighbor 18.2.2.2 send-community both neighbor 18.2.2.2 send-label neighbor 18.3.3.3 activate neighbor 18.3.3.3 send-community both neighbor 18.3.3.3 send-label

neighbor 26.1.1.2 activate exit-address-family ! address-family vpnv4

bgp nexthop trigger delay 7

neighbor 18.2.2.2 activate

neighbor 18.2.2.2 send-community extended

neighbor 18.3.3.3 activate

neighbor 18.3.3.3 send-community extended exit-address-family

The below configuration example is for BGP PIC with TDM PW:

pseudowire-class pseudowire1 encapsulation mpls control-word

no status control-plane route-watch

status peer topology dual-homed ! Interface CEM0/0/0 cem 1

xconnect 17.1.1.1 4101 encapsulation mpls pw-class pseudowire1

Example: ATM IMA Configuration

The following example shows how to add a T1/E1 interface to an ATM IMA group as a part of an ATM over MPLS pseudowire configuration. For more information about how to configure pseudowires, see Configuring

Pseudowire, on page 1

This section displays a partial configuration intended to demonstrate a specific feature.Note

controller t1 4/0/0

ima-group 0 clock source line

interface atm4/0/ima0

pvc 1/33 l2transport

encapsulation aal0

xconnect 1.1.1.1 33 encapsulation mpls

Example: ATM over MPLS

The following sections contain sample ATM over MPLS configurations:

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Example: ATM over MPLS

Cell Packing Configuration Examples

The following sections contain sample ATM over MPLS configuration using Cell Relay:

VC Mode

CE 1 Configuration

interface Gig4/3/0 no negotiation auto load-interval 30 interface Gig4/3/0 ip address 20.1.1.1 255.255.255.0 interface ATM4/2/4 no shut exit ! interface ATM4/2/4.10 point ip address 50.1.1.1 255.255.255.0 pvc 20/101 encapsulation aal5snap ! ip route 30.1.1.2 255.255.255.255 50.1.1.2

Configuring Pseudowire

CE 2 Configuration

interface Gig8/8 no negotiation auto load-interval 30 interface Gig8/8 ip address 30.1.1.1 255.255.255.0 interface ATM6/2/1 no shut ! interface ATM6/2/1.10 point ip address 50.1.1.2 255.255.255.0 pvc 20/101 encapsulation aal5snap ! ip route 20.1.1.2 255.255.255.255 50.1.1.1

PE 1 Configuration

interface Loopback0 ip address 192.168.37.3 255.255.255.255 ! interface ATM0/0/0 no shut ! interface ATM0/0/0 atm mcpt-timers 150 1000 4095 interface ATM0/0/0.10 point pvc 20/101 l2transport encapsulation aal0 cell-packing 20 mcpt-timer 1 xconnect 192.168.37.2 100 encapsulation mpls ! interface Gig0/3/0 no shut ip address 40.1.1.1 255.255.0.0 mpls ip ! mpls ip

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Example: ATM over MPLS

mpls label protocol ldp mpls ldp router-id Loopback0 force mpls ldp graceful-restart router ospf 1 network 40.1.0.0 0.0.255.255 area 1 network 192.168.37.0 0.0.0.255 area 1 nsf

PE 2 Configuration

interface Loopback0 ip address 192.168.37.2 255.255.255.255 ! interface ATM9/3/1 no shut ! interface ATM9/3/1 atm mcpt-timers 150 1000 4095 interface ATM9/3/1.10 point pvc 20/101 l2transport encapsulation aal0 cell-packing 20 mcpt-timer 1 xconnect 192.168.37.3 100 encapsulation mpls ! interface Gig6/2 no shut ip address 40.1.1.2 255.255.0.0 mpls ip ! mpls ip mpls label protocol ldp mpls ldp router-id Loopback0 force mpls ldp graceful-restart router ospf 1 network 40.1.0.0 0.0.255.255 area 1 network 192.168.37.0 0.0.0.255 area 1 nsf

VP Mode

CE 1 Configuration

interface Gig4/3/0 no negotiation auto load-interval 30 interface Gig4/3/0 ip address 20.1.1.1 255.255.255.0 interface ATM4/2/4 ! interface ATM4/2/4.10 point ip address 50.1.1.1 255.255.255.0 pvc 20/101 encapsulation aal5snap ! ip route 30.1.1.2 255.255.255.255 50.1.1.2

CE 2 Configuration

! interface Gig8/8 no negotiation auto load-interval 30 interface Gig8/8 ip address 30.1.1.1 255.255.255.0 interface ATM6/2/1

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Example: ATM over MPLS

no shut ! interface ATM6/2/1.10 point ip address 50.1.1.2 255.255.255.0 pvc 20/101 encapsulation aal5snap ! ip route 20.1.1.2 255.255.255.255 50.1.1.1

PE 1 Configuration

interface Loopback0 ip address 192.168.37.3 255.255.255.255 ! interface ATM0/0/0 no shut ! interface ATM0/0/0 atm mcpt-timers 150 1000 4095 interface ATM0/0/0.50 multipoint atm pvp 20 l2transport cell-packing 10 mcpt-timer 1 xconnect 192.168.37.2 100 encapsulation mpls ! interface Gig0/3/0 no shut ip address 40.1.1.1 255.255.0.0 mpls ip ! mpls ip mpls label protocol ldp mpls ldp router-id Loopback0 force mpls ldp graceful-restart router ospf 1 network 40.1.0.0 0.0.255.255 area 1 network 192.168.37.0 0.0.0.255 area 1 nsf

Configuring Pseudowire

PE 2 Configuration

! interface Loopback0 ip address 192.168.37.2 255.255.255.255 ! interface ATM9/3/1 no shut ! interface ATM9/3/1 atm mcpt-timers 150 1000 4095 interface ATM9/3/1.50 multipoint atm pvp 20 l2transport cell-packing 10 mcpt-timer 1 xconnect 192.168.37.3 100 encapsulation mpls ! interface Gig6/2 no shut ip address 40.1.1.2 255.255.0.0 mpls ip ! mpls ip mpls label protocol ldp mpls ldp router-id Loopback0 force mpls ldp graceful-restart router ospf 1 network 40.1.0.0 0.0.255.255 area 1 network 192.168.37.0 0.0.0.255 area 1 nsf

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Configuring Pseudowire

Cell Relay Configuration Examples

The following sections contain sample ATM over MPLS configuration using Cell Relay:

VC Mode

CE 1 Configuration

! interface gigabitethernet4/3/0 no negotiation auto load-interval 30 interface gigabitethernet4/3/0 ip address 20.1.1.1 255.255.255.0 ! interface ATM4/2/4 ! interface ATM4/2/4.10 point ip address 50.1.1.1 255.255.255.0 pvc 20/101 encapsulation aal5snap ! ip route 30.1.1.2 255.255.255.255 50.1.1.2 !

Example: ATM over MPLS

CE 2 Configuration

interface gigabitethernet8/8 no negotiation auto load-interval 30 interface gigabitethernet8/8 ip address 30.1.1.1 255.255.255.0 interface ATM6/2/1 ! interface ATM6/2/1.10 point ip address 50.1.1.2 255.255.255.0 pvc 20/101 encapsulation aal5snap ! ip route 20.1.1.2 255.255.255.255 50.1.1.1

PE 1 Configuration

! interface Loopback0 ip address 192.168.37.3 255.255.255.255 ! interface ATM0/0/0 ! interface ATM0/0/0.10 point pvc 20/101 l2transport encapsulation aal0 xconnect 192.168.37.2 100 encapsulation mpls ! interface gigabitethernet0/3/0 ip address 40.1.1.1 255.255.0.0 mpls ip ! mpls ip mpls label protocol ldp mpls ldp router-id Loopback0 force mpls ldp graceful-restart router ospf 1

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Example: ATM over MPLS

network 40.1.0.0 0.0.255.255 area 1 network 192.168.37.0 0.0.0.255 area 1 nsf

PE 2 Configuration

! interface Loopback0 ip address 192.168.37.2 255.255.255.255 ! interface ATM9/3/1 ! interface ATM9/3/1.10 point pvc 20/101 l2transport encapsulation aal0 xconnect 192.168.37.3 100 encapsulation mpls ! interface gigabitethernet6/2 ip address 40.1.1.2 255.255.0.0 mpls ip ! mpls ip mpls label protocol ldp mpls ldp router-id Loopback0 force mpls ldp graceful-restart router ospf 1 network 40.1.0.0 0.0.255.255 area 1 network 192.168.37.0 0.0.0.255 area 1 nsf

Configuring Pseudowire

VP Mode

CE 1 Configuration

CE 2 Configuration

! interface gigabitethernet8/8 no negotiation auto load-interval 30 interface gigabitethernet8/8 ip address 30.1.1.1 255.255.255.0 interface ATM6/2/1 ! interface ATM6/2/1.10 point ip address 50.1.1.2 255.255.255.0 pvc 20/101 encapsulation aal5snap

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Configuring Pseudowire

Example: Ethernet over MPLS

! ip route 20.1.1.2 255.255.255.255 50.1.1.1

PE 1 Configuration

interface Loopback0 ip address 192.168.37.3 255.255.255.255 ! ! interface ATM0/0/0 interface ATM0/0/0.50 multipoint atm pvp 20 l2transport xconnect 192.168.37.2 100 encapsulation mpls ! interface gigabitethernet0/3/0 ip address 40.1.1.1 255.255.0.0 mpls ip ! mpls ip mpls label protocol ldp mpls ldp router-id Loopback0 force mpls ldp graceful-restart router ospf 1 network 40.1.0.0 0.0.255.255 area 1 network 192.168.37.0 0.0.0.255 area 1 nsf

PE 2 Configuration

interface Loopback0 ip address 192.168.37.2 255.255.255.255 ! ! interface ATM9/3/1 interface ATM9/3/1.50 multipoint atm pvp 20 l2transport xconnect 192.168.37.3 100 encapsulation mpls ! interface gigabitethernet6/2 ip address 40.1.1.2 255.255.0.0 mpls ip ! mpls ip mpls label protocol ldp mpls ldp router-id Loopback0 force mpls ldp graceful-restart router ospf 1 network 40.1.0.0 0.0.255.255 area 1 network 192.168.37.0 0.0.0.255 area 1 nsf

Example: Ethernet over MPLS

PE 1 Configuration

! mpls label range 16 12000 static 12001 16000 mpls label protocol ldp mpls ldp neighbor 10.1.1.1 targeted ldp mpls ldp graceful-restart multilink bundle-name authenticated ! ! !

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Example: Ethernet over MPLS

! redundancy

mode sso ! ! ! ip tftp source-interface GigabitEthernet0 ! ! interface Loopback0

ip address 10.5.5.5 255.255.255.255 ! interface GigabitEthernet0/0/4

no ip address

negotiation auto !

service instance 2 ethernet

encapsulation dot1q 2

xconnect 10.1.1.1 1001 encapsulation mpls ! service instance 3 ethernet

encapsulation dot1q 3

xconnect 10.1.1.1 1002 encapsulation mpls !

! interface GigabitEthernet0/0/5

ip address 172.7.7.77 255.0.0.0 negotiation auto mpls ip mpls label protocol ldp

! router ospf 1

router-id 5.5.5.5 network 5.5.5.5 0.0.0.0 area 0 network 172.0.0.0 0.255.255.255 area 0 network 10.33.33.33 0.0.0.0 area 0 network 192.0.0.0 0.255.255.255 area 0

Configuring Pseudowire

PE 2 Configuration

! mpls label range 16 12000 static 12001 16000 mpls label protocol ldp mpls ldp neighbor 10.5.5.5 targeted ldp mpls ldp graceful-restart multilink bundle-name authenticated ! ! redundancy

mode sso

! ! ! ip tftp source-interface GigabitEthernet0 ! ! interface Loopback0

ip address 10.1.1.1 255.255.255.255

! interface GigabitEthernet0/0/4

no ip address negotiation auto

service instance 2 ethernet

encapsulation dot1q 2

xconnect 10.5.5.5 1001 encapsulation mpls ! service instance 3 ethernet

encapsulation dot1q 3

xconnect 10.5.5.5 1002 encapsulation mpls

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Configuring Pseudowire

Example: Ethernet over MPLS

! ! interface GigabitEthernet0/0/5

ip address 172.7.7.7 255.0.0.0

negotiation auto

mpls ip

mpls label protocol ldp ! router ospf 1

router-id 10.1.1.1

network 10.1.1.1 0.0.0.0 area 0

network 172.0.0.0 0.255.255.255 area 0

network 10.33.33.33 0.0.0.0 area 0

network 192.0.0.0 0.255.255.255 area 0 !

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Example: Ethernet over MPLS

Configuring Pseudowire

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CHAPTER 2

Automatic Protection Switching Configuration

Note

Automatic Protection Switching is not supported on the Cisco ASR 900 RSP3 module.

Automatic protection switching (APS) is a protection mechanism for SONET networks that enables SONET connections to switch to another SONET circuit when a circuit failure occurs. A protect interface serves as the backup interface for the working interface. When the working interface fails, the protect interface quickly assumes its traffic load.

Automatic Protection Switching, page 57

•

Inter Chassis Redundancy Manager, page 58

•

Limitations, page 58

•

Automatic Protection Switching Interfaces Configuration, page 59

•

Configuring a Working Interface, page 59

•

Configuring a Protect Interface, page 60

•

Configuring Other APS Options, page 61

•

Stateful MLPPP Configuration with MR-APS Inter-Chassis Redundancy, page 63

•

Monitoring and Maintaining APS, page 63

•

Automatic Protection Switching

The protection mechanism used for this feature is "1+1, Bidirectional, nonrevertive" as described in the Bellcore publication "TR-TSY-000253, SONET Transport Systems; Common Generic Criteria, Section 5.3." In the 1+1 architecture, there is one working interface (circuit) and one protect interface, and the same payload from the transmitting end is sent to both the receiving ends. The receiving end decides which interface to use. The line overhead (LOH) bytes (K1 and K2) in the SONET frame indicate both status and action.

The protect interface is configured with the IP address of the router that has the working interface. The APS Protect Group Protocol, which runs on top of UDP, provides communication between the process controlling the working interface and the process controlling the protect interface. Using this protocol, interfaces can be

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Inter Chassis Redundancy Manager

switched because of a router failure, degradation or loss of channel signal, or manual intervention. In bidirectional mode, the receive and transmit channels are switched as a pair.

Two SONET/SDH connections are required to support APS. In a telco environment, the SONET/SDH circuits must be provisioned as APS. You must also provision the operation (for example, 1+1), mode (for example, bidirectional), and revert options (for example, no revert). If the SONET/SDH connections are homed on two separate routers (the normal configuration), an out of band (OOB) communications channel between the two routers needs to be set up for APS communication.

When configuring APS, we recommend that you configure the working interface first. Normal operation with 1+1 operation is to configure it as a working interface. Also configure the IP address of the interface being used as the APS OOB communications path.

APS uses Protect Group Protocol (PGP) between working and protect interfaces. The protect interface APS configuration should include an IP address of a loopback interface on the same router to communicate with the working interface using PGP. Using the PGP, POS interfaces can be switched in case of a degradation or loss of channel signal, or manual intervention. In bidirectional mode, the receive and transmit channels are switched as a pair.

In bidirectional APS the local and the remote connections negotiate the ingress interface to be selected for the data path. The egress interface traffic is not transmitted to both working and protect interfaces.

Automatic Protection Switching Configuration

Inter Chassis Redundancy Manager

ICRM provides these capabilities for stateful MLPPP with MR-APS Inter-Chassis Redundancy implementation:

Node health monitoring for complete node, PE, or box failure detection. ICRM also communicates

•

failures to the applications registered with an ICRM group.

Reliable data channels to transfer the state information.

•

Detects active RP failure as node failure and notifies the controllers.

•

ICRM on the standby RP re-establishes the communication channel with peer node if the active RP fails.

For instructions on how to configure ICRM, see Stateful MLPPP Configuration with MR-APS Inter-Chassis

Redundancy.

Limitations

The following limitations apply when using APS on the Cisco ASR 903 Router

Starting Cisco IOS XE Release 3.11, APS is supported with CES.

•

APS is not supported with ATM.

•

APS is not supported with IMA.

•

APS is not supported with POS.

•

APS supports HDLC, PPP, and MLPPP encapsulation.

•

ATM Layer 2 AAL0 and AAL5 encapsulation types are supported

•

APS is only supported on MLP and serial interfaces on the OC-3 interface module.

•

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Automatic Protection Switching Configuration

Automatic Protection Switching Interfaces Configuration

The following sections describe how to configure APS interfaces:

Note

We recommend that you configure the working interface before the protected interface in order to prevent the protected interface from becoming the active interface and disabling the working interface.

For information about configuring optical interfaces for the first time, see the Cisco ASR 903 Series Router Chassis Configuration Guide.

Configuring a Working Interface

To configure a working interface, use the following commands beginning in global configuration mode.

Before You Begin

To configure the controller in SDH mode, see Configuring Optical Interface Modules.

SUMMARY STEPS

controller sonet slot / port-adapter / port

aps group group-number acr

aps working circuit-number

end

DETAILED STEPS

Step 1

Step 2

controller sonet slot / port-adapter / port

Example:

Router(config)# controller sonet 0/0/0

aps group group-number acr

Example:

Router(config-if)# aps group acr 1

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PurposeCommand or Action

Returns to controller configuration mode.

Configures the working interface group on a router. The APS group number must be greater than 1.

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Configuring a Protect Interface

Automatic Protection Switching Configuration

PurposeCommand or Action

Step 3

aps working circuit-number

Example:

Router(config-if)# aps working 1

Step 4

Example:

Router(config-if)# end

Configuring a Protect Interface

To configure a protect interface, use the following commands beginning in global configuration mode.

Before You Begin

To configure the controller in SDH mode, see Configuring Optical Interface Modules.

SUMMARY STEPS

controller sonet slot / port-adapter / port

aps group group-number acr

aps protect circuit-number ip-address

end

Configures this interface as a working interface. 1 is the only supported circuit-number value.

Exits configuration mode.end

DETAILED STEPS

Step 1

Step 2

Time Division Multiplexing Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco ASR 900 Series)

controller sonet slot / port-adapter / port

Example:

Router(config)# controller sonet 0/0/0

aps group group-number acr

Example:

Router(config-if)# aps group acr 2

PurposeCommand or Action

Returns to controller configuration mode.

(Optional) Allows more than one protect/working interface group to be supported on a router.

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Automatic Protection Switching Configuration

Configuring Other APS Options

PurposeCommand or Action

Step 3

aps protect circuit-number ip-address

Example:

Router(config-if)# aps protect 1 7.7.7.7

Step 4

Example:

Router(config-if)# end

Configuring Other APS Options

To configure the other APS options, use any of the following optional commands in interface configuration mode.

SUMMARY STEPS

aps authenticate string

aps force circuit-number

aps group group-number

aps lockout circuit-number

aps manual circuit-number

aps revert minutes

aps timers seconds1 seconds2

aps unidirectional

Configures the interface as a protect interface and specifies the IP address of the device that contains the working interface.

Exits configuration mode.end

DETAILED STEPS

Step 1

Step 2

aps authenticate string

Example:

Router(config-if)# aps authenticate authstring

aps force circuit-number

Example:

Router(config-if)# aps force 1

PurposeCommand or Action

(Optional) Configures the authentication string that the router uses to authenticate PGP message exchange between protect or working routers. The maximum length of the string is eight alphanumeric characters. Spaces are not accepted.

(Optional) Manually switches the specified circuit to a protect interface, unless a request of equal or higher priority is in effect. For example, if the protect interface is configured as circuit 1, use the aps force 1 command to set the protect interface to active.

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Configuring Other APS Options

PurposeCommand or Action

Note

Automatic Protection Switching Configuration

If you do not want the protect port to be active all the time, use no aps force 1 command after using aps force 1 command. Similarly for aps force 0 use use no aps force 0 command.

Step 3

Step 4

Step 5

Step 6

Step 7

aps group group-number

Example:

Router(config-if)# aps group 2

aps lockout circuit-number

Example:

Router(config-if)# aps lockout 1

aps manual circuit-number

Example:

Router(config-if)# aps manual 0

aps revert minutes

Example:

Router(config-if)# aps revert 10

aps timers seconds1 seconds2

(Optional) Allows more than one protect/working interface group to be supported on a router.

(Optional) Prevents a working interface from switching to a protect interface. For example, if the protect interface is configured as circuit 1, use the aps lockout 1 command to prevent the protect interface from becoming active.

(Optional) Manually switches a circuit to a protect interface, unless a request of equal or higher priority is in effect. For example, if the working interface is configured as circuit 0, the command is applied as follows:

The aps manual 0 command activates the working interface

•

The aps manual 1 command activates the protect circuit.

•

Applying the no form of the command removes the configuration and stops the router from sending K 1and K2 bytes on the interface.

(Optional) Enables automatic switchover from the protect interface to the working interface after the working interface becomes available.

(Optional) Specifies the following values:

Step 8

Example:

Router(config-if)# aps timers 1 5

• seconds1—The time between hello packets.

• seconds2—The time that the working interface can be down before the

router switches to the protect interface.

(Optional) Configures a protect interface for unidirectional mode.aps unidirectional

Example:

Router(config-if)# aps unidirectional

Example

Router# configure terminal Router# interface gigabit ethernet 0/1/0 Router(config-if)# aps force 1 Ruter(config-if)# aps unidirectional

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Automatic Protection Switching Configuration

Stateful MLPPP Configuration with MR-APS Inter-Chassis Redundancy

The Cisco ASR 903 Router supports Stateful MLPPP with Inter-Chassis Redundancy. For information on how to configure this feature, see http://www.cisco.com/en/US/docs/ios/wan/configuration/guide/wan_mlppp_

mr_aps.html.

Monitoring and Maintaining APS

To provide information about system processes, the Cisco IOS software includes an extensive list of EXEC commands that begin with the word show, which, when executed, display detailed tables of system information. Following is a list of some of the common show commands for the APS feature.

To display the information described, use these commands in privileged EXEC mode.

Use the show aps command to display information about APS.

•

Use the show controller sonet slot command to display information about the controller port.

•

use the show interfaces command to display information about the interface.

•

For more information about these commands, see the Cisco IOS Interface and Hardware Component Command Reference.

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Monitoring and Maintaining APS

Automatic Protection Switching Configuration

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CHAPTER 3

Configuring Multi Router Automatic Protection Switching

Note

Multi Router Automatic Protection Switching is not supported on the Cisco ASR 900 RSP3 module.

The Multi Router Automatic Protection Switching (MR-APS) integration with hot standby pseudowire (HSPW) feature is a protection mechanism for Synchronous Optical Network (SONET) networks that enables SONET connections to switch to another SONET circuit when a circuit failure occurs. A protect interface serves as the backup interface for the working interface. When the working interface fails, the protect interface quickly assumes its traffic load.

When you perform protect-active router powercycle, the convergence times becomes high ranging from

2.3 sconds to 2.8 seconds. The APS switchover triggers the PWs at the protect interface to become active during any one of the following failure scenarios:

Either port at the ADM does not respond.

•

The port at the router does not respond.

•

The link between ADM and router fails.

•

The router fails over.

•

Finding Feature Information, page 66

•

Restrictions for MR-APS, page 66

•

Information About MR-APS, page 66

•

Configuring MR-APS with HSPW-ICRM on a CEM interface, page 69

•

Configuring MR-APS on a POS interface, page 84

•

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Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.

Restrictions for MR-APS

Asynchronous Transfer Mode (ATM) port mode is not supported.

•

An APS group number must be greater than zero.

•

Revertive APS mode on the Circuit Emulation (CEM) interface is not supported.

•

Configuring Multi Router Automatic Protection Switching

High convergence of around 2.3 to 2.8 seconds is observed when you perform protect-active router

•

powercycle. This affects CEM MRAPS.

HSPW group number other than the redundancy interchassis group number is not supported.

•

Do not configure the backup delay value command if the MR-APS integration with HSPW feature is

•

configured.

Unconfiguring the mpls ip command on the core interface is not supported.

•

The hspw force switch command is not supported.

•

Information About MR-APS

This feature enables interface connections to switch from one circuit to another if a circuit fails. Interfaces can be switched in response to a router failure, degradation or loss of channel signal, or manual intervention. In a multi router environment, the MR-APS allows the protected SONET interface to reside in a different router from the working SONET interface.

Service providers are migrating to ethernet networks from their existing SONET or SDH equipment to reduce cost. Any transport over MPLS (AToM) PWs help service providers to maintain their investment in time division multiplexing (TDM) network and change only the core from SONET or SDH to ethernet. When the service providers move from SONET or SDH to ethernet, network availability is always a concern. Therefore, to enhance the network availability, service providers use PWs.

The HSPW support for TDM access circuits (ACs) allow the backup PW to be in a hot- standby state, so that it can immediately take over if the primary PW fails. The present HSPW solution does not support ACs as part of the APS group. The PWs which are configured over the protected interface, remain in the standby state. MR-APS integration with an HSPW is an integration of APS with CEM TDM HSPW and improves the switchover time.

For more information on APS, see the Automatic Protection Switching Configuration.

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Configuring Multi Router Automatic Protection Switching

In the example below, routers P1 and PE1 are in the same APS group G1, and routers P2 and PE2 are in the same APS group G2. In group G1, P1 is the working router and PE1 is the protected router. Similarly in group G2, P2 is the working router and PE2 is the protected router.

The MR-APS integration with HSPW deployment involves cell sites connected to the provider network using bundled T1/E1 connections. These T1/E1 connections are aggregated into the optical carrier 3 (OC3) link using the add-drop multiplexers (ADMs).

Figure 6: MR-APS Integration with HSPW Implementation

Information About MR-APS

Failover Operations

MR-APS integration with HSPW feature handles the following failures:

Failure 1, where the link between ADM and P1 goes down, or the connecting ports at ADM or P1 go

•

down.

Failure 2, where the router P1 fails.

•

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Information About MR-APS

Figure 7: Failure Points in the Network

Failure 3, where the router P1 is isolated from the core.

•

Configuring Multi Router Automatic Protection Switching

In case of failure 1, where either port at the ADM goes down, or the port at the router goes down, or the link between ADM and router fails, the APS switchover triggers the pseudowires at the protect interface to become active. The same applies to failure 2 as well where the complete router fails over.

In case of failure 3, where all the links carrying primary and backup traffic lose the connection, a new client is added to the inter chassis redundancy manager (ICRM) infrastructure to handle the core isolation. The client listens to the events from the ICRM. Upon receiving the core isolation event from the ICRM, the client either initiates the APS switchover, or initiates the alarm based on the peer core isolation state. If APS switchover occurs, it changes the APS inactive interface to active and hence activates the PWs at the interface. Similarly, when core connectivity goes up based upon the peer core isolation state, it clears the alarms or triggers the

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APS switchover. The ICRM monitors the directly connected interfaces only. Hence only those failures in the directly connected interfaces can cause a core isolation event.

Figure 8: MR-APS Integration on a POS interface

Configuring MR-APS with HSPW-ICRM on a CEM interface

To configure MR-APS integration with HSPW-ICRM on a CEM interface, complete the following steps:

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SUMMARY STEPS

enable

configure terminal

pseudowire-class pw-class-name

encapsulation mpls

status peer topology dual-homed

exit

redundancy

interchassis group group-id

member ip ip-address

backbone interface slot/bay/port

10.

exit

11.

controller SONET slot/bay/port

12.

framing [SDH | SONET]

13.

clock source line

14.

sts-1 sts1-number

15.

mode vt-15

16.

vtg vtg_number t1 t1_line_number cem-group group-number timeslots time-slot-range

17.

exit

18.

aps group group_id

19.

aps [working | protect] aps-group-number

20.

aps hspw-icrm-grp group-number

21.

exit

22.

interface cem slot/bay/port

23.

cem group-number

24.

xconnect peer-ip-address vcid pw-class pw-class-name

25.

backup peer peer-id vc-id pw-class pw-class-name

26.

end

27.

Configuring Multi Router Automatic Protection Switching

DETAILED STEPS

Step 1

Step 2

Time Division Multiplexing Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco ASR 900 Series)

Example:

Router> enable

Example:

Router# configure terminal

PurposeCommand or Action

Enables privileged EXEC mode.enable

Enter your password if prompted.

•

Enters global configuration mode.configure terminal

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PurposeCommand or Action

Step 3

Step 4

Step 5

Step 6

Step 7

Step 8

Step 9

pseudowire-class pw-class-name

Example:

Router(config)# pseudowire-class hspw_aps

encapsulation mpls

Example:

Router(config-pw-class)# encapsulation mpls

status peer topology dual-homed

Example:

Router(config-pw-class)# status peer topology dual-homed

Example:

Router(config-pw-class)# exit

Example:

Router(config)# redundancy

interchassis group group-id

Example:

Router(config-red)# interchassis group 50

member ip ip-address

Specifies the name of a PW class and enters PW class configuration mode.

Specifies that MPLS is used as the data encapsulation method for tunneling Layer 2 traffic over the PW.

Enables the reflection of the attachment circuit status on both the primary and secondary PWs. This configuration is necessary if the peer PEs are connected to a dual-homed device.

Exits PW class configuration mode.exit

Enters the redundancy configuration mode.redundancy

Configures an interchassis group within the redundancy configuration mode and enters the interchassis redundancy mode.

Configures the IP address of the peer member group.

Step 10

Step 11

Example:

Router(config-r-ic)# member ip 60.60.60.2

backbone interface slot/bay/port

Example:

Router(config-r-ic)# backbone interface

GigabitEthernet 0/2/3

Example:

Router(config-r-ic)# exit

Time Division Multiplexing Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco ASR 900 Series)

Specifies the backbone interface.

• slot—Chassis slot number, which is always 0.

• bay—Card interface bay number in a slot. The range is from

0 to 5.

• port—Port or interface number. The range is from 0 to 7 for

Gigabit Ethernet.

Exits the redundancy mode.exit

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Configuring Multi Router Automatic Protection Switching

PurposeCommand or Action

Step 12

Step 13

Step 14

Step 15

Step 16

controller SONET slot/bay/port

Example:

Router(config)# controller SONET 0/5/2

framing [SDH | SONET]

Example:

Router(config-controller)# framing SONET

Example:

Router(config-controller)# clock source

line

sts-1 sts1-number

Example:

Router(config-controller)# sts-1 1

Selects and configures a SONET controller and enters controller configuration mode.

• slot—Chassis slot number, which is always 0.

• bay—Card interface bay number in a slot. The range is from

0 to 5.

• port—Port or interface number. The range is from 0 to 7 for

Gigabit Ethernet.

Configures the controller with framing type. SONET framing is the default option.

Sets the clocking for individual T1 or E1 links.clock source line

Specifies the STS identifier.

Specifies the STS-1 mode of operation.mode vt-15

Step 17

Example:

Router(config-ctrlr-sts1)# mode vt-15

vtg vtg_number t1 t1_line_number cem-group group-number timeslots time-slot-range

Example:

Router(config-ctrlr-sts1)# vtg 1 t1 1 cem-group 0 timeslots 1-24

Creates a Circuit Emulation Services over Packet Switched Network circuit emulation (CESoPSN) CEM group.

• vtg—Specifies the VTG number from 1-7.

• t1—Specifies the T1 line.

• t1_line_number—Specifies the T1 line number.

• cem-group—Creates a circuit emulation (CEM) channel from

one or more time slots of a T1 line.

• group-number—CEM identifier to be used for this group of

time slots. For T1 ports, the range is from 0 to 23.

• timeslots—Specifies that a list of time slots is to be used as

specified by the time-slot-range argument.

• time-slot-range—Specifies the time slots to be included in the

CEM channel. The list of time slots may include commas and hyphens with no spaces between the numbers.

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Configuring MR-APS with HSPW-ICRM on a CEM interface

PurposeCommand or Action

Step 18

Step 19

Step 20

Step 21

Step 22

Step 23

Example:

Router(config-ctrlr-sts1)# exit

aps group group_id

Example:

Router(config-controller)# aps group 1

aps [working | protect] aps-group-number

Example:

Router(config-controller)# aps working 1

aps hspw-icrm-grp group-number

Example:

Router(config-controller)# aps hspw-icrm-group 1

Example:

Router(config-controller)# exit

interface cem slot/bay/port

Example:

Router(config)# interface cem 0/5/2

Exits from the STS configuration mode.exit

Configures the APS group for CEM.

Configures the APS group as working or protect interface.

Note

For MR-APS, one router must be configured as aps working 1 and the other router must be configured as aps protect 1.

Associates the APS group to an ICRM group number.

Ends the controller session and returns to the configuration mode.exit

Configures a serial interface and enters the interface configuration mode

• slot—Chassis slot number, which is always 0.

• bay—Card interface bay number in a slot. The range is from

0 to 5.

Step 24

Step 25

cem group-number

Example:

Router(config-if)# cem 0

xconnect peer-ip-address vcid pw-class pw-class-name

Example:

Router(config-if-srv)# xconnect 3.3.3.3

1 pw-class hspw_aps

Time Division Multiplexing Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco ASR 900 Series)

• port—Port or interface number. The range is from 0 to 7 for

Gigabit Ethernet.

Selects the CEM circuit (group) to configure a PW for.

Specifies the IP address of the peer PE router and the 32-bit virtual circuit identifier shared between the PEs at each end of the control channel.

• peer-ip-address—IP address of the remote provider edge (PE)

peer. The remote router ID can be any IP address, as long as it is reachable.

• vcid —32-bit identifier of the virtual circuit (VC) between the

PE routers.

• pw-class—Specifies the PW class.

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Configuring Multi Router Automatic Protection Switching

PurposeCommand or Action

• pw-class-name—Specifies the name of the PW class.

Step 26

backup peer peer-id vc-id pw-class pw-class-name

Example:

Router(config-if-srv)# backup peer

4.3.3.3 90 pw-class vpws

Step 27

Example:

Router(config-if-srv)# end

Verifying MR-APS

Use the show cem circuit [cem-group-id | interface {CEM | Virtual-CEM} slot /subslot /port

•

cem-group-id | detail | summary] command to display CEM statistics for the configured CEM circuits. If xconnect is configured under the circuit, the command output also includes information about the attached circuit.

Following is a sample output of the show cem circuit command to display the detailed information about CEM circuits configured on the router:

Router# show cem circuit

Note

The peer router IP address and virtual circuit ID must be a unique combination on the router.

Specifies a redundant peer for a PW virtual circuit.

• peer-id vc-id—Specifies IP address of the remote peer.

• pw-class—Specifies the PW class.

• pw-class-name—Specifies the name of the PW class.

Returns to privileged EXEC mode.end

CEM Int. ID Ctrlr Admin Circuit AC

-------------------------------------------------------------CEM0/5/2 1 UP UP Active UP CEM0/5/2 2 UP UP Active UP CEM0/5/2 3 UP UP Active UP

! . . .

CEM0/5/2 83 UP UP Active UP CEM0/5/2 84 UP UP Active UP !

Following is a sample output of the show cem circuit0-504 command to display the detailed information about that particular circuit:

Router# show cem circuit 1

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CEM0/5/2 , ID: 1, Line: UP, Admin: UP, Ckt: ACTIVE Controller state:

up, T1/E1 state: up Idle Pattern: 0xFF, Idle CAS: 0x8 Dejitter: 5 (In use: 0) Payload Size: 192 Framing: Unframed CEM Defects Set None

Signalling: No CAS RTP: No RTP

Ingress Pkts: 151066 Dropped: 0

Egress Pkts: 151066 Dropped: 0

CEM Counter Details Input Errors: 0 Output Errors: 0

Pkts Missing: 0 Pkts Reordered: 0

Verifying MR-APS

Misorder Drops: 0 JitterBuf Underrun: 0

Error Sec: 0 Severly Errored Sec: 0

Unavailable Sec: 0 Failure Counts: 0

Pkts Malformed: 0 JitterBuf Overrun: 0

Use the show mpls ldp neighbor command to display the status of Label Distribution Protocol (LDP)

•

sessions:

Router# show mpls ldp neighbor

Peer LDP Ident: 17.3.3.3:0; Local LDP Ident 17.1.1.1:0

TCP connection: 17.3.3.3.13282 - 17.1.1.1.646 State: Oper; Msgs sent/rcvd: 466/209; Downstream Up time: 00:23:50 LDP discovery sources:

GigabitEthernet0/4/0 , Src IP addr: 11.11.11.2 Targeted Hello 17.1.1.1 -> 17.3.3.3, active, passive

Addresses bound to peer LDP Ident:

70.70.70.1 22.22.22.2 17.3.3.3 11.11.11.2

Peer LDP Ident: 17.4.4.4:0; Local LDP Ident 17.1.1.1:0

TCP connection: 17.4.4.4.24248 - 17.1.1.1.646 State: Oper; Msgs sent/rcvd: 209/205; Downstream Up time: 00:23:40 LDP discovery sources:

GigabitEthernet0/4/2, Src IP addr: 33.33.33.2 Targeted Hello 17.1.1.1 -> 17.4.4.4, active, passive

Addresses bound to peer LDP Ident:

70.70.70.2 44.44.44.2 17.4.4.4 33.33.33.2

Peer LDP Ident: 17.2.2.2:0; Local LDP Ident 17.1.1.1:0

TCP connection: 17.2.2.2.32112 - 17.1.1.1.646 State: Oper; Msgs sent/rcvd: 45/44; Downstream Up time: 00:23:38 LDP discovery sources:

GigabitEthernet0/4/4 , Src IP addr: 60.60.60.2

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Addresses bound to peer LDP Ident:

22.22.22.1 44.44.44.1 17.2.2.2 60.60.60.2

Use the show mpls l2 vc command to display information related to a VC:

•

Router# show mpls l2 vc

Local intf Local circuit Dest address VC ID

Status

------------- -------------------------- --------------- ----------

---------CEM0/5/2 SATOP T1 1 17.3.3.3 1001

CEM0/5/2 SATOP T1 2 17.3.3.3 1002

CEM0/5/2 SATOP T1 3 17.3.3.3 1003

UP ! . . .

CEM0/5/2 SATOP T1 19 17.3.3.3 1019

CEM0/5/2 SATOP T1 20 17.3.3.3 1020

UP !

Local intf Local circuit Dest address VC ID

Status

------------- -------------------------- --------------- ----------

---------CEM0/5/2 SATOP T1 21 17.3.3.3 1021

CEM0/5/2 SATOP T1 22 17.3.3.3 1022

CEM0/5/2 SATOP T1 23 17.3.3.3 1023

! . . .

CEM0/5/2 SATOP T1 25 17.3.3.3 1025

CEM0/5/2 SATOP T1 43 17.3.3.3 1043

UP !

Local intf Local circuit Dest address VC ID

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Status

------------- -------------------------- --------------- ----------

---------CEM0/5/2 SATOP T1 44 17.3.3.3 1044

CEM0/5/2 SATOP T1 45 17.3.3.3 1045

CEM0/5/2 SATOP T1 46 17.3.3.3 1046

! . .

CEM0/5/2 SATOP T1 65 17.3.3.3 1065

CEM0/5/2 SATOP T1 66 17.3.3.3 1066

Verifying MR-APS

Local intf Local circuit Dest address VC ID

Status

------------- -------------------------- --------------- ----------

---------CEM0/5/2 SATOP T1 67 17.3.3.3 1067

CEM0/5/2 SATOP T1 68 17.3.3.3 1068

CEM0/5/2 SATOP T1 69 17.3.3.3 1069

! . . .

CEM0/5/2 SATOP T1 83 17.3.3.3 1083

CEM0/5/2 SATOP T1 84 17.3.3.3 1084

CEM0/5/2 SATOP T1 1 17.4.4.4 4001 STANDBY CEM0/5/2 SATOP T1 2 17.4.4.4 4002 STANDBY CEM0/5/2 SATOP T1 3 17.4.4.4 4003 STANDBY CEM0/5/2 SATOP T1 4 17.4.4.4 4004 STANDBY CEM0/5/2 SATOP T1 5 17.4.4.4 4005 STANDBY

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Configuring Multi Router Automatic Protection Switching

Local intf Local circuit Dest address VC ID

Status

------------- -------------------------- --------------- ----------

---------CEM0/5/2 SATOP T1 6 17.4.4.4 4006 STANDBY CEM0/5/2 SATOP T1 7 17.4.4.4 4007 STANDBY CEM0/5/2 SATOP T1 8 17.4.4.4 4008 STANDBY

! . . .

CEM0/5/2 SATOP T1 27 17.4.4.4 4027 STANDBY CEM0/5/2 SATOP T1 28 17.4.4.4 4028 STANDBY

Local intf Local circuit Dest address VC ID

Status

------------- -------------------------- --------------- ----------

---------CEM0/5/2 SATOP T1 29 17.4.4.4 4029 STANDBY CEM0/5/2 SATOP T1 30 17.4.4.4 4030 STANDBY CEM0/5/2 SATOP T1 31 17.4.4.4 4031 STANDBY

! . . .

CEM0/5/2 SATOP T1 50 17.4.4.4 4050 STANDBY CEM0/5/2 SATOP T1 51 17.4.4.4 4051 STANDBY

Local intf Local circuit Dest address VC ID

Status

------------- -------------------------- --------------- ----------

---------CEM0/5/2 SATOP T1 52 17.4.4.4 4052 STANDBY CEM0/5/2 SATOP T1 53 17.4.4.4 4053 STANDBY CEM0/5/2 SATOP T1 54 17.4.4.4 4054 STANDBY

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! . . .

CEM0/5/2 SATOP T1 73 17.4.4.4 4073 STANDBY CEM0/5/2 SATOP T1 74 17.4.4.4 4074 STANDBY

Local intf Local circuit Dest address VC ID

Status

------------- -------------------------- --------------- ----------

---------CEM0/5/2 SATOP T1 75 17.4.4.4 4075 STANDBY CEM0/5/2 SATOP T1 76 17.4.4.4 4076 STANDBY CEM0/5/2 SATOP T1 77 17.4.4.4 4077 STANDBY

Verifying MR-APS

! . . .

CEM0/5/2 SATOP T1 83 17.4.4.4 4083 STANDBY CEM0/5/2 SATOP T1 84 17.4.4.4 4084 STANDBY

R-96-2011#sh cem circuit CEM Int. ID Ctrlr Admin Circuit AC

-------------------------------------------------------------CEM0/5/2 1 UP UP Active UP CEM0/5/2 2 UP UP Active UP CEM0/5/2 3 UP UP Active UP

! . . .

CEM0/5/2 83 UP UP Active UP CEM0/5/2 84 UP UP Active UP

Use the show mpls l2 vc vc-id detail command to display detailed information related to the VC:

•

Router# show mpls l2 vc 1001 detail

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Verifying MR-APS

Configuring Multi Router Automatic Protection Switching

Local interface: CEM0/5/2 up, line protocol up, SATOP T1 1 up

Destination address: 17.3.3.3, VC ID: 1001, VC status: up

Output interface: Gi0/4/0 , imposed label stack {42} Preferred path: not configured Default path: active Next hop: 11.11.11.2

Create time: 00:26:04, last status change time: 00:03:36

Last label FSM state change time: 00:23:00

Signaling protocol: LDP, peer 17.3.3.3:0 up

Targeted Hello: 17.1.1.1(LDP Id) -> 17.3.3.3, LDP is UP Graceful restart: configured and enabled Non stop routing: not configured and not enabled Status TLV support (local/remote) : enabled/supported

LDP route watch : enabled Label/status state machine : established, LruRru Last local dataplane status rcvd: No fault Last BFD dataplane status rcvd: Not sent Last BFD peer monitor status rcvd: No fault Last local AC circuit status rcvd: No fault Last local AC circuit status sent: No fault Last local PW i/f circ status rcvd: No fault Last local LDP TLV status sent: No fault Last remote LDP TLV status rcvd: No fault

Last remote LDP ADJ status rcvd: No fault MPLS VC labels: local 182, remote 42 Group ID: local 0, remote 0 MTU: local 0, remote 0 Remote interface description:

Sequencing: receive disabled, send disabled Control Word: On (configured: autosense) SSO Descriptor: 17.3.3.3/1001, local label: 182 Dataplane:

SSM segment/switch IDs: 1278679/4262 (used), PWID: 1

VC statistics:

transit packet totals: receive 201616, send 201617 transit byte totals: receive 41129664, send 40323400 transit packet drops: receive 0, seq error 0, send 0

Use the show hspw-aps-icrm group group-id command to display information about a specified HSPW

•

APS group:

Router# show hspw-aps-icrm group 100

ICRM group id 100, Flags : My core isolated No,Peer core isolated No,

State Connect

APS Group id 1 hw_if_index 33 APS valid:Yes

Total aps grp attached to ICRM group 100 is 1

Use the show hspw-aps-icrm all command to display information about all HSPW APS and ICRM

•

groups:

Router# show hspw-aps-icrm all

ICRM group id 100, Flags : My core isolated No,Peer core isolated No,

State Connect

APS Group id 1 hw_if_index 33 APS valid:Yes

Total aps grp attached to ICRM group 100 is 1 ICRM group count

attached to MR-APS HSPW feature is 1

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Use the show redundancy interchassis command to display information about interchassis redundancy

•

group configuration:

Router# show redundancy interchassis

Redundancy Group 100 (0x64)

Applications connected: MR-APS with HSPW Monitor mode: RW member ip: 60.60.60.2 "R-222-2028", CONNECTED

Route-watch for 60.60.60.2 is UP

MR-APS with HSPW state: CONNECTED backbone int GigabitEthernet0/4/0 : UP (IP) backbone int GigabitEthernet0/4/2 : UP (IP)

ICRM fast-failure detection neighbor table

IP Address Status Type Next-hop IP Interface ========== ====== ==== =========== =========

60.60.60.2 UP RW

Use the show aps command to display information about the current APS feature:

•

Router# show aps

Verifying MR-APS

SONET 0/5/2 APS Group 1: working channel 1 (Active) (HA)

Protect at 60.60.60.2 PGP timers (from protect): hello time=1; hold time=10 SONET framing Remote APS configuration: (null)

• Use the show xconnect all command to display information about all Cross–Connect attachment circuits

and PWs:

Router# show xconnect all

Legend: XC ST=Xconnect State S1=Segment1 State S2=Segment2 State

UP=Up DN=Down AD=Admin Down IA=Inactive SB=Standby HS=Hot Standby RV=Recovering NH=No Hardware

XC ST Segment 1 S1 Segment 2

------+---------------------------------+--+----------------------------

------+---------------------------------+--+---

--+-UP pri ac CEM0/5/2 :1(SATOP T1) UP mpls 17.3.3.3:1001

IA sec ac CEM0/5/2 :1(SATOP T1) UP mpls 17.4.4.4:4001

UP pri ac CEM0/5/2 :10(SATOP T1) UP mpls 17.3.3.3:1010

IA sec ac CEM0/5/2 :10(SATOP T1) UP mpls 17.4.4.4:4010

! . . .

UP pri ac CEM0/5/2 :9(SATOP T1) UP mpls 17.3.3.3:1009

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Configuration Examples for MR-APS

IA sec ac CEM0/5/2 :9(SATOP T1) UP mpls 17.4.4.4:4009

Configuration Examples for MR-APS

The following example shows how to configure the MR-APS integration with HSPW on a CEM interface on the working router with framing mode as SONET on router P1:

RouterP1> enable RouterP1# configure terminal RouterP1(config)# pseudowire-class hspw_aps RouterP1(config-pw-class)# encapsulation mpls RouterP1(config-pw-class)# status peer topology dual-homed RouterP1(config-pw-class)# exit RouterP1(config)# redundancy RouterP1(config-red)# interchassis group 1 RouterP1(config-r-ic)# member ip 14.2.0.2 RouterP1(config-r-ic)# backbone interface GigabitEthernet 0/1/0 RouterP1(config-r-ic)# backbone interface GigabitEthernet 0/1/1 RouterP1(config-r-ic)# exit RouterP1(config)# controller SONET 0/1/0 RouterP1(config-controller)# framing sonet RouterP1(config-controller)# clock source line RouterP1(config-controller)# sts-1 1 RouterP1(config-ctrlr-sts1)# mode vt-15 RouterP1(config-ctrlr-sts1)# vtg 1 t1 1 cem-group 0 timeslots 1-24 RouterP1(config-ctrlr-sts1)# exit RouterP1(config-controller)# aps group 3 RouterP1(config-controller)# aps working 1 RouterP1(config-controller)# aps hspw-icrm-grp 1 RouterP1(config-controller)# exit RouterP1(config)# interface cem 0/1/0 RouterP1(config-if)# cem 0 RouterP1(config-if)# xconnect 3.3.3.3 1 encapsulation mpls pw-class hspw_aps RouterP1(config-if)# backup peer 4.4.4.4 2 pw-class hspw_aps RouterP1(config-if)# exit RouterP1(config)# end

The following example shows how to configure the MR-APS integration with HSPW on a CEM interface on the protect router with framing mode as SONET on router PE1:

RouterPE1> enable RouterPE1# configure terminal RouterPE1(config)# pseudowire-class hspw_aps RouterPE1(config-pw-class)# encapsulation mpls RouterPE1(config-pw-class)# status peer topology dual-homed RouterPE1(config-pw-class)# exit RouterPE1(config)# redundancy RouterPE1(config-red)# interchassis group 1 RouterPE1(config-r-ic)# member ip 14.2.0.1 RouterPE1(config-r-ic)# backbone interface GigabitEthernet 0/1/0 RouterPE1(config-r-ic)# backbone interface GigabitEthernet 0/1/1 RouterPE1(config-r-ic)# exit RouterPE1(config)# controller SONET 0/2/0 RouterPE1(config-controller)# framing sonet RouterPE1(config-controller)# clock source line RouterPE1(config-controller)# sts-1 1 RouterPE1(config-ctrlr-sts1)# mode vt-15 RouterPE1(config-ctrlr-sts1)# vtg 1 t1 1 cem-group 0 timeslots 1-24 RouterPE1(config-ctrlr-sts1)# exit RouterPE1(config-controller)# aps group 3 RouterPE1(config-controller)# aps protect 1 14.2.0.2

Configuring Multi Router Automatic Protection Switching

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RouterPE1(config-controller)# aps hspw-icrm-grp 1 RouterPE1(config-controller)# exit RouterPE1(config)# interface cem 0/2/0 RouterPE1(config-if)# cem 0 RouterPE1(config-if)# xconnect 3.3.3.3 3 pw-class hspw_aps RouterPE1(config-if)# backup peer 4.4.4.4 4 pw-class hspw_aps RouterPE1(config-if)# exit RouterPE1(config)# end

The following example shows how to configure the MR-APS integration with HSPW on a CEM interface on the working router with framing mode as SONET on router P2:

RouterP2> enable RouterP2# configure terminal RouterP2(config)# pseudowire-class hspw_aps RouterP2(config-pw-class)# encapsulation mpls RouterP2(config-pw-class)# status peer topology dual-homed RouterP2(config-pw-class)# exit RouterP2(config)# redundancy RouterP2(config-red)# interchassis group 1 RouterP2(config-r-ic)# member ip 14.6.0.2 RouterP2(config-r-ic)# backbone interface GigabitEthernet 0/2/0 RouterP2(config-r-ic)# backbone interface GigabitEthernet 0/2/1 RouterP2(config-r-ic)# exit RouterP2(config)# controller SONET 0/1/0 RouterP2(config-controller)# framing sonet RouterP2(config-controller)# clock source line RouterP2(config-controller)# sts-1 1 RouterP2(config-ctrlr-sts1)# mode vt-15 RouterP2(config-ctrlr-sts1)# vtg 1 t1 1 cem-group 0 timeslots 1-24 RouterP2(config-ctrlr-sts1)# exit RouterP2(config-controller)# aps group 3 RouterP2(config-controller)# aps working 1 RouterP2(config-controller)# aps hspw-icrm-grp 1 RouterP2(config-controller)# exit RouterP2(config)# interface cem 0/1/0 RouterP2(config-if)# cem 0 RouterP2(config-if)# xconnect 1.1.1.1 1 encapsulation mpls pw-class hspw_aps RouterP2(config-if)# backup peer 2.2.2.2 3 pw-class hspw_aps RouterP2(config-if)# exit RouterP2(config)# end

The following example shows how to configure the MR-APS Integration with HSPW on a CEM interface on the protect router with framing mode as SONET on router PE2:

RouterPE2> enable RouterPE2# configure terminal RouterPE2(config)# pseudowire-class hspw_aps RouterPE2(config-pw-class)# encapsulation mpls RouterPE2(config-pw-class)# status peer topology dual-homed RouterPE2(config-pw-class)# exit RouterPE2(config)# redundancy RouterPE2(config-red)# interchassis group 1 RouterPE2(config-r-ic)# member ip 14.6.0.1 RouterPE2(config-r-ic)# backbone interface GigabitEthernet 0/2/0 RouterPE2(config-r-ic)# backbone interface GigabitEthernet 0/2/1 RouterPE2(config-r-ic)# exit RouterPE2(config)# controller SONET 0/2/0 RouterPE2(config-controller)# framing sonet RouterPE2(config-controller)# clock source line RouterPE2(config-controller)# sts-1 1 RouterPE2(config-ctrlr-sts1)# mode vt-15 RouterPE2(config-ctrlr-sts1)# vtg 1 t1 1 cem-group 0 timeslots 1-24 RouterPE2(config-ctrlr-sts1)# exit RouterPE2(config-controller)# aps group 2 RouterPE2(config-controller)# aps protect 1 14.6.0.2 RouterPE2(config-controller)# aps hspw-icrm-grp 1 RouterPE2(config-controller)# exit RouterPE2(config)# interface cem 0/2/0 RouterPE2(config-if)# cem 0 RouterPE2(config-if)# xconnect 1.1.1.1 2 pw-class hspw_aps RouterPE2(config-if)# backup peer 2.2.2.2 4 pw-class hspw_aps RouterPE2(config-if)# exit RouterPE2(config)# end

Configuration Examples for MR-APS

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Configuring Multi Router Automatic Protection Switching

Configuring MR-APS on a POS interface

The following section shows how to configure the MR-APS integration on a POS interface on the working node and protect node.

Configuring working node for POS MR-APS

To configure MR-APS working node for POS interface, complete the following steps:

SUMMARY STEPS

enable

configure terminal

exit

redundancy

interchassis group group-id

member ip ip-address

monitor peer bfd

exit

controller SONET slot/bay/port

framing [SDH | SONET]

10.

clock source internal

11.

sts-1 1-3POS

12.

exit

13.

controller SONET slot/bay/port

14.

Shutdown

15.

aps group group_id

16.

aps working aps-group-number

17.

aps interchassis group group-id

18.

no shut

19.

exit

20.

interface POS slot/bay/port

21.

ip address ip-address

22.

encapsulation ppp

23.

end

24.

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Configuring Multi Router Automatic Protection Switching

DETAILED STEPS

Configuring working node for POS MR-APS

PurposeCommand or Action

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6

Example:

Router> enable

Example:

Router# configure terminal

Example:

Router(config-pw-class)# exit

Example:

Router(config)# redundancy

interchassis group group-id

Example:

Router(config-red)# interchassis group 50

member ip ip-address

Enables privileged EXEC mode.enable

Enter your password if prompted.

•

Enters global configuration mode.configure terminal

Exits PW class configuration mode.exit

Enters the redundancy configuration mode.redundancy

Configures an interchassis group within the redundancy configuration mode and enters the interchassis redundancy mode.

Configures the IP address of the peer member group.

Step 7

Step 8

Step 9

Example:

Router(config-r-ic)# member ip 60.60.60.2

monitor peer bfd

Example:

Router(config-red)# monitor peer bfd

Example:

Router(config-r-ic)# exit

controller SONET slot/bay/port

Example:

Router(config)# controller SONET 0/5/2

Enables BFD on the POS link.

Exits the redundancy mode.exit

Selects and configures a SONET controller and enters controller configuration mode.

• slot—Chassis slot number, which is always 0.

• bay—Card interface bay number in a slot. The range

is from 0 to 5.

• port—Port or interface number. The range is from 0

to 7 for Gigabit Ethernet.

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Configuring working node for POS MR-APS

Configuring Multi Router Automatic Protection Switching

PurposeCommand or Action

Step 10

Step 11

Step 12

Step 13

Step 14

Step 15

framing [SDH | SONET]

Example:

Router(config-controller)# framing SONET

Example:

Router(config-controller)# clock source internal

sts-1 1-3POS

Example:

Router(config-controller)# sts-1 1-3

Example:

Router(config-ctrlr-sts1)# exit

controller SONET slot/bay/port

Example:

Router(config)# controller SONET 0/5/2

Configures the controller with framing type. SONET framing is the default option.

Sets the clocking for individual E1 links.clock source internal

Specifies the STS identifier.

Exits from the STS configuration mode.exit

Selects and configures a SONET controller and enters controller configuration mode.

Shut down the controller before APS configuration.Shutdown

Step 16

Step 17

Step 18

Step 19

Example:

Router(config)# Shutdown

aps group group_id

Example:

Router(config-controller)# aps group 1

aps working aps-group-number

Example:

Router(config-controller)# aps working 1

aps interchassis group group-id

Example:

Router(config-red)# aps interchassis group 50

Example:

Router(config-controller)# no shut

Configures the APS group for POS.

Configures the APS group as working or protect interface.

Note

For MR-APS, one router must be configured as aps working 1 and the other router must be configured as aps protect 1.

Configures an aps inter chassis group.

Shut down the controller.no shut

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Configuring Multi Router Automatic Protection Switching

Configuring protect node for POS MR-APS

PurposeCommand or Action

Step 20

Step 21

Step 22

Step 23

Step 24

exit

Example:

Router(config-controller)# exit

interface POS slot/bay/port

Example:

Router(config)# interface POS 0/5/2

ip address ip-address

Example:

Router(config-if)# ip address 45.1.1.2

255.255.255.0

encapsulation ppp

Example:

Router(config-if-srv)# encapsulation ppp

Ends the controller session and returns to the configuration mode.

Configures a serial interface and enters the interface configuration mode

• slot—Chassis slot number, which is always 0.

• bay—Card interface bay number in a slot. The range

is from 0 to 5.

• port—Port or interface number. The range can be 0-3.

Assigns the ip address to POS interface

Specifies the ppp encapsulation over POS interface.

Returns to privileged EXEC mode.end

Example:

Router(config-if-srv)# end

Configuring protect node for POS MR-APS

To configure MR-APS protect node for POS interface, complete the following steps:

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Configuring protect node for POS MR-APS

SUMMARY STEPS

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

20.

21.

22.

23.

24.

Configuring Multi Router Automatic Protection Switching

enable

configure terminal

exit

redundancy

interchassis group group-id

member ip ip-address

monitor peer bfd

exit

controller SONET slot/bay/port

framing [SDH | SONET]

clock source internal

sts-1 1-3POS

exit

controller SONET slot/bay/port

Shutdown

aps group group_id

aps protect 1 remote loopback ip

aps interchasis group interchasis group-id

no shut

exit

interface POS slot/bay/port

ip address ip-address

encapsulation ppp

end

DETAILED STEPS

Step 1

Step 2

Step 3

Time Division Multiplexing Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco ASR 900 Series)

Example:

Router> enable

Example:

Router# configure terminal

Example:

Router(config-pw-class)# exit

PurposeCommand or Action

Enables privileged EXEC mode.enable

Enter your password if prompted.

•

Enters global configuration mode.configure terminal

Exits PW class configuration mode.exit

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Configuring Multi Router Automatic Protection Switching

Configuring protect node for POS MR-APS

PurposeCommand or Action

Step 4

Step 5

Step 6

Step 7

Step 8

Step 9

Example:

Router(config)# redundancy

interchassis group group-id

Example:

Router(config-red)# interchassis group 50

member ip ip-address

Example:

Router(config-r-ic)# member ip 60.60.60.2

monitor peer bfd

Example:

Router(config-red)# monitor peer bfd

Example:

Router(config-r-ic)# exit

controller SONET slot/bay/port

Example:

Router(config)# controller SONET 0/5/2

Enters the redundancy configuration mode.redundancy

Configures an interchassis group within the redundancy configuration mode and enters the interchassis redundancy mode.

Configures the IP address of the peer member group.

Enables BFD on the POS link.

Exits the redundancy mode.exit

Selects and configures a SONET controller and enters controller configuration mode.

• slot—Chassis slot number, which is always 0.

• bay—Card interface bay number in a slot. The range

is from 0 to 5.

Step 10

Step 11

Step 12

framing [SDH | SONET]

Example:

Router(config-controller)# framing SONET

Example:

Router(config-controller)# clock source internal

sts-1 1-3POS

Example:

Router(config-controller)# sts-1 1-3

Time Division Multiplexing Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco ASR 900 Series)

• port—Port or interface number. The range is from

0 to 7 for Gigabit Ethernet.

Configures the controller with framing type. SONET framing is the default option.

Sets the clocking for individual E1 links.clock source internal

Specifies the STS identifier.

Page 98

Configuring protect node for POS MR-APS

Configuring Multi Router Automatic Protection Switching

PurposeCommand or Action

Step 13

Step 14

Step 15

Step 16

Step 17

Step 18

Example:

Router(config-ctrlr-sts1)# exit

controller SONET slot/bay/port

Example:

Router(config)# controller SONET 0/5/2

Example:

Router(config)# Shutdown

aps group group_id

Example:

Router(config-controller)# aps group 1

aps protect 1 remote loopback ip

Example:

Router(config-controller)# aps protect 1

192.168.1.1

aps interchasis group interchasis group-id

Exits from the STS configuration mode.exit

Selects and configures a SONET controller and enters controller configuration mode.

Shut down the controller before APS configuration.Shutdown

Configures the APS group for POS.

Enable the protect node.

Enable the inter chasis.

Step 19

Step 20

Step 21

Example:

Router(config-controller)# aps interchasis group 1

Example:

Router(config-controller)# no shut

exit

Example:

Router(config-controller)# exit

interface POS slot/bay/port

Example:

Router(config)# interface POS 0/5/2

Unshut the controller.no shut

Ends the controller session and returns to the configuration mode.

Configures a serial interface and enters the interface configuration mode

• slot—Chassis slot number, which is always 0.

• bay—Card interface bay number in a slot. The range

is from 0 to 5.

• port—Port or interface number. The range can be

0-3.

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Configuring Multi Router Automatic Protection Switching

Verifying MR-APS on POS interface

PurposeCommand or Action

Step 22

Step 23

ip address ip-address

Example:

Router(config-if)# ip address 45.1.1.2

255.255.255.0

encapsulation ppp

Example:

Router(config-if-srv)# encapsulation ppp

Step 24

Example:

Router(config-if-srv)# end

Verifying MR-APS on POS interface

Use the show rgf groups command to display POS statistics for the configured POS circuits.

•

Following is a sample output of the show rgf groups command to display the detailed information about POS interface configured on the router:

Router# show rgf groups

Assigns the ip address to POS interface

Specifies the ppp encapsulation over POS interface.

Returns to privileged EXEC mode.end

Router# sh rgf groups

Total RGF groups: 2

---------------------------------------------------------ACTIVE RGF GROUP

RGF Group ID : 1 RGF Peer Group ID: 0 ICRM Group ID : 1 APS Group ID : 1

RGF State information:

My State Present : Active-fast <<<<<<<<<<Chk this status

Previous : Standby-hot

Peer State Present: Standby-hot

Previous: Standby-bulk

Misc:

Communication state Up aps_bulk: 0 aps_stby: 0 peer_stby: 0

-> Driven Peer to [Peer Standby Hot] Progression

-> Standby sent Bulk Sync start Progression RGF GET BUF: 66 RGF RET BUF 66

Following is a sample output of the show ppp interfacePOS

Router# show ppp interface 0/5/2

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Verifying MR-APS on POS interface

PPP Serial Context Info

------------------Interface : PO0/4/2.1 PPP Serial Handle: 0xE9000006 PPP Handle : 0xBF000006 SSS Handle : 0x8000006 AAA ID : 14 Access IE : 0xA000006 SHDB Handle : 0xA3000006 State : Up Last State : Binding Last Event : LocalTerm

Use the show ccm group id grioup-id number command to check CCM status

•

Router# show ccm group id

CCM Group 1 Details

----------------------------------------

Configuring Multi Router Automatic Protection Switching

CCM Group ID : 1 Infra Group ID : 2 Infra Type : Redundancy Group Facility (RGF) <<<<Chk

this HA State : CCM HA Active Redundancy State : Dynamic Sync Group Initialized/cleaned : FASLE

ASR903_PE2#

Following is a sample output of the show aps gr 1 command:

•

Router# show aps gr 1

SONET 0/4/2 APS Group 1: working channel 1 (Inactive) (HA)

Protect at 33.1.1.1 PGP timers (from protect): hello time=1; hold time=10 SDH framing Remote APS configuration: (null)

Following is a sample output of the show redundancy interchassis command to display information

•

about interchassis redundancy group configuration:

Router# show redundancy interchassis

Redundancy Group 1 (0x1)

Applications connected: MSR Monitor mode: BFD member ip: 10.17.255.163 "ASR903_PE2", CONNECTED

BFD neighbor: GigabitEthernet0/1/2, next hop 33.1.1.2, DOWN MSR state: CONNECTED

ICRM fast-failure detection neighbor table

IP Address Status Type Next-hop IP Interface ========== ====== ==== =========== =========

10.17.255.163 DOWN BFD 33.1.1.2 GigabitEthernet0/1/2

Time Division Multiplexing Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco ASR 900 Series)

Cisco ASR 900 Series Configuration Manual

CONTENTS

Configuring Pseudowire

Pseudowire Overview

Limitations

Circuit Emulation Overview

Structure-Agnostic TDM over Packet

Circuit Emulation Service over Packet-Switched Network

Asynchronous Transfer Mode over MPLS

Transportation of Service Using Ethernet over MPLS

Limitations

Configuring CEM

Configuration Guidelines and Restrictions

Configuring a CEM Group

Using CEM Classes

Configuring a Clear-Channel ATM Interface

Configuring CEM Parameters

Configuring Payload Size (Optional)

Setting the Dejitter Buffer Size

Setting an Idle Pattern (Optional)

Enabling Dummy Mode

Setting a Dummy Pattern

Shutting Down a CEM Channel

Configuring CAS

Configuring CAS

Information About CAS

Verifying CAS Configuration

Configuration Examples for CAS

Configuring ATM

Configuring a Clear-Channel ATM Interface

Configuring ATM IMA

BGP PIC with TDM Configuration

Configuring Structure-Agnostic TDM over Packet (SAToP)

Configuring Circuit Emulation Service over Packet-Switched Network (CESoPSN)

Configuring a Clear-Channel ATM Pseudowire

Configuring an ATM over MPLS Pseudowire

Configuring the Controller

Configuring an IMA Interface

Configuring the ATM over MPLS Pseudowire Interface

Configuring 1-to-1 VCC Cell Transport Pseudowire

Mapping a Single PVC to a Pseudowire

Configuring N-to-1 VCC Cell Transport Pseudowire

Configuring 1-to-1 VPC Cell Transport

Configuring ATM AAL5 SDU VCC Transport

Configuring a Port Mode Pseudowire

Optional Configurations

Configuring an Ethernet over MPLS Pseudowire

Configuring Pseudowire Redundancy

Pseudowire Redundancy with Uni-directional Active-Active

Restrictions

Configuring Pseudowire Redundancy Active-Active— Protocol Based

Configuring the Working Controller for MR-APS with Pseudowire Redundancy Active-Active

Configuring the Protect Controller for MR-APS with Pseudowire Redundancy Active-Active

Verifying the Interface Configuration

Configuration Examples

Example: CEM Configuration

Example: BGP PIC with TDM Configuration

Example: BGP PIC with TDM-PW Configuration

Example: ATM IMA Configuration

Example: ATM over MPLS

Cell Packing Configuration Examples

VC Mode

VP Mode

Cell Relay Configuration Examples

VC Mode

VP Mode

Example: Ethernet over MPLS

Automatic Protection Switching Configuration

Automatic Protection Switching

Inter Chassis Redundancy Manager

Limitations

Automatic Protection Switching Interfaces Configuration

Configuring a Working Interface

Configuring a Protect Interface

Configuring Other APS Options

Stateful MLPPP Configuration with MR-APS Inter-Chassis Redundancy

Monitoring and Maintaining APS

Configuring Multi Router Automatic Protection Switching

Finding Feature Information

Restrictions for MR-APS