Avaya Configuring APPN User Manual

Configuring APPN Services

BayRS Version 13.0 0 Site Manager Software Version 7.00

Part No. 303511-A Rev 00 October 1998

4401 Great America Parkway 8 Federal Street Santa Clara, CA 95054 Billerica, MA 01821

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Preface

Before You Begin ............................................................................................................. xiii

Text Conventions ..... ......................................................... ...............................................xiv

Acronyms .........................................................................................................................xvi

Bay Networks Technical Publications .............................................................................xvii

How to Get Help ............................................................................................................xviii

Chapter 1 Advanced Peer-to-Peer Networking Overview

APPN Networking Overview .......................................................................................... 1-2

APPN Node Types ..........................................................................................................1-2

Network Nodes ........................................................................................................ 1-3

End Nodes ................................. ....................................................................... ......1-3

Low-Entry Networking Nodes .......................................... ....... ..... ....... .. .......... ....... .1-3

Control Points and Logical Units ....................................................................................1-5

Dependent Logical Unit Requester and Server ..............................................................1-6

lnterfaces, Ports, and Link Stations ................................................................................1-8

Interfaces .................................................................................................................1-9

Ports ......................................................................................................................... 1-9

Link Stations ............................................................................................................. 1-9

Connection Networks .................................................................................................. 1 -10

Intermediate Session Routing .....................................................................................1-12

Packet Segmentation and Reassembly .................................................................1-13

Adaptive Pacing .....................................................................................................1-13

High Performance Routing ...........................................................................................1 -14

Rapid Transport Protocol ................................................................................1-16

Non-Disruptive Path Switch ing ........................................................................1-16

End-to-End Error Recovery .............................................................................1 -17

End-to-End Flow and Congestion Control .......................................................1-17

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Automatic Network Routing ....................................................................................1 -18

Fast Packet Switching ......................................................................................1-18

Session Transpar e n cy ................................................................. ....................1-18

Source Routing ................................................................................................ 1-18

APPN Services ............................................................................................................ 1 -19

Session Services ..................................................................................................1-19

Directory Services .................................................................................................1-20

Topology a nd Routing Services .............................................................................1-20

Configuration Services ..........................................................................................1-21

Management Services ..........................................................................................1-21

For More Inform ation About APPN ...............................................................................1-22

Chapter 2 Enabling APPN Services

Using the Parameter Descriptions .................................................................................. 2-1

Enabling APPN over LLC2 Interfaces ............................................................................ 2-2

Enabling APPN over LLC2 Interfaces Using SRB .........................................................2-7

Enabling APPN Interfaces over SDLC .........................................................................2-12

Chapter 3 Editing APPN Parameters

Using the Parameter Descriptions .................................................................................. 3-1

Accessing APP N Parameters ........ ....................................................................... ..........3-2

Editing APPN Global Parameters ...................................................................................3-3

APPN Global Advanced Parameters ....................................................................... 3-5

Editing APPN lnterfaces a nd Ports ..............................................................................3-15

Deleting APPN Interfaces ..................................................................................... 3 -17

Editing APPN Ports ............................................................................................... 3 -17

Deleting APPN Ports .............................................................................................3-19

Adding Ports to an APPN Interface .......................................................................3-20

Editing APPN Advanced Port Parameters ............................................................. 3 -23

Editing APPN Adjacent Link Stations ...........................................................................3-35

Deleting Adjacent Link Stations ............................................................................3 -42

Adding Adjacent Link Stations ...............................................................................3-43

Editing Ad vanced Adjacent Link Station Paramete rs .............................................3 -49

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Editing APPN Connection Networks .............................................................................3-57

Adding APPN Connection Networks .....................................................................3-59

Deleting APPN Connection Networks ....................................................................3-60

Editing APPN Connection Network Ports ...............................................................3-61

Adding APPN Connection Network Ports .............................................................3-62

Deleting APPN Connection Network Port s ............................................................ 3 -63

Editing APPN Advanced Connection Network Parameters ....................................3-63

Editing APPN Directory Entry Parameters ................................................................... 3 -68

Adding APPN LU Names to Directory Services .....................................................3-71

Deleting APPN Directory Entires ...........................................................................3-74

Appendix A APPN Base and Optional Function Sets

Appendix B APPN Default Settings

Index

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Figures

Figure 1-1. APPN Network with Dif ferent Node Types ..............................................1-4

Figure 1-2. CP-CP and LU-LU Session s ........ ............................................................1-5

Figure 1-3. DLUR and DLUS in an APPN Network ....................................................1-7

Figure 1-4. Interface, Port, and Link Station Relationship .......................................... 1-8

Figure 1-5. Sample APPN Connection Network .......................................................1 -11

Figure 1-6. Nonadjacent LU-LU Session Through an Intermedia te Node . ..............1-12

Figure 1-7. APPN ISR Routing Functions in SNA Architecture ................................1-13

Figure 1-8. APPN HPR Routing Functions in SNA Architecture ..............................1 -15

Figure 1-9. HPR RTP Connection Supporting APPN Sessions ...............................1-16

Figure 1-10. HPR ANR Routing and Packet Handling Operations .............................1-19

Figure 2-1. Source Route Encapsulation Dialog Box .................................................2-3

Figure 2-2. APPN Local Node Name Configuratio n Window .....................................2-3

Figure 2-3. APPN/FR Conf igu ration Window .............................................................2-5

Figure 2-4. Adjacent Link Station Dialog Box .............................................................2-6

Figure 2-5. Source Route Encapsulation Dialog Box .................................................2-7

Figure 2-6. Source Routing Global Parameters Window ............................................2-8

Figure 2-7. Edit SR Interface Window ......................................................................2-10

Figure2-8. APPN Virtual Ring Number C onfiguration Window ...............................2-11

Figure 2-9. SDLC Line Parameters Window ............................................................ 2 -13

Figure 2-10. Select Protocols Window ....................................................................... 2 -17

Figure 2-11. APPN Local Node Name Configuratio n Window ...................................2-17

Figure 2-12. APPN SDLC Address Configuratio n Window ........................................2-18

Figure 2-13. Adjacent Link Station Dialog Box ...........................................................2-19

Figure 3-1. Configuration Manager Window ..............................................................3-2

Figure 3-2. Edit APPN Global Parameters Window ...................................................3-3

Figure 3-3. Advanced APPN Global Parameters Window ..........................................3-6

Figure 3-4. APPN Interface List Window .................................................................. 3 -16

Figure 3-5. APPN Port List Window .........................................................................3-18

Figure 3-6. APPN/FR Por t Configuration Window ....................................................3-20

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Figure 3-7. APPN Port Windo w ...................................... ..........................................3-24

Figure 3-8. APPN Adjacent Link Station List Window ..............................................3 -35

Figure 3-9. APPN Adjacent Link Station Port Configuration Window .......................3-43

Figure 3-10. APPN Adjacent Link Station Configuration Window ..............................3-44

Figure 3-11. APPN Adjacent Link Station Advanced Configuration Window .............3-50

Figure 3-12. APPN Connection Network List Window ...............................................3-58

Figure 3-13. Connection N etwork Configuration Window ..........................................3-59

Figure 3-14. APPN Connection Network Port List Window ........................................3-61

Figure 3-15. Connection Network Port Configuration Window ...................................3-62

Figure 3-16. APPN Connect io n Network Advan ce d Parameters Window ..................3-64

Figure 3-17. APPN Directory Entry List Window ........................................................3-69

Figure 3-18. Directory Entry Configuration Window ...................................................3 -71

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Tables

Table 3-1. Link Activation Limit Default Values ......................................................3-27

Table A-1. APPN Base Function Sets .....................................................................A-1

Table A-2. APPN Optional Function Sets ................................................................ A-4

Table B-1. APPN Global and Advanced Global Parameters ...................................B-1

Table B-2. APPN Interface and Port Parameters .................................................... B-2

Table B-3. APPN Adjacent Link Station Parameters ............................................... B-4

Table B-4. APPN C o nne ction Networks and Port Parameters ................................ B-5

Table B-5. APPN Directory Services Parameters ...................................................B-6

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This guide describes Adva nced Peer-to-Peer Networking (APPN) se rvices and what you do to start and customize APPN services on a Bay Networks® router.

Before You Begin

Before using this guide, you must complete the following procedure s. For a new router:

• Install the router (see the installation guide that came with your router).

• Connect the router to the network and create a pilot configuration file (see

Quick-Starting Routers, Configuring BayStack Remote Access, or Connecti ng ASN Routers to a Network).

Preface

303511-A Rev 00

Make sure tha t you are running the latest version of Bay Networks BayRS Site Manager sof tware. For information about upgrading BayRS and Site Manager, see the upgr ading guide for your version of B ayRS.

™

and

xiii

Configu ring APPN Service s

Text Conventions

This guide use s the following text conventions:

angle brackets (< >) Indicate that you choose the text to enter based on the

description inside the brackets. Do not type the brackets when entering the command. Example: If the command syntax is:

bold text

<ip_address>

ping ping 192.32.10.12

Indicates text tha t you need to enter and command

, you enter:

names and options. Example: Enter

Example: Use the

show ip {alerts | routes

command.

dinfo

}

braces ({}) Indicate required elements in syntax descriptions

where there is more than one option. You must choose only one of the options. Do not type the braces when entering the command. Example: If the command syntax is:

, you must enter either:

show ip {alerts | routes show ip alerts or show ip routes

}

brackets ([ ]) Indicate optional elements in syntax descriptions. Do

not type the brackets when entering the command. Example: If the command syntax is:

, you can enter either:

show ip interfaces [-alerts show ip interfaces

]

show ip interfaces -alerts

xiv

ellipsis points (. . . ) Indicate that you repeat the last element of the

comman d as need ed . Example: If the command syntax is:

ethernet/2/1 ethernet/2/1

parameter> <value>

and as many parameter-value pairs as

] . . .

, you enter

needed.

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Preface

italic text Indicates file and directory names, new terms, book

titles, and variables in command syntax descriptions. Where a variable is two or more words, the words are connected by an underscore. Example: If the command syntax is:

show at <

valid_route

valid_route>

is one va riable and you subs titu te one value

for it.

screen text Indicates system output , fo r exa mple, prompts and

system messages. Example:

Set Ba y Netw orks Tr ap Mo nito r Fil ters

separator ( > ) Shows menu paths.

Example: Protocol s > IP identifies the IP option on the Protocols menu.

vertical line (

) Separates choices for command keywords and

arguments. Enter only one of the choices. Do not type the vertical line when entering the command. Example: If the command syntax is:

show ip {alerts | rou tes } show ip alerts

show ip routes

, you enter either:

, but not both.

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Configu ring APPN Service s

Acron yms

ANR Automatic Network Rout ing APPN Advanced Peer-to-Peer Networking COS class of se rvice CP control point DLC data link control DLCI data link connection ide ntifier DLSw data link switching DLUR dependent logical unit requester DLUS dependent logical unit server DS directory serv ices DSPU down stream physical unit EN e nd node EP entry point

xvi

FDDI Fiber Distributed Data Interface FQPCID f ully qualifie d procedure correlation ident ifier GDS general data stream HPR High Performance Routing IP Internet Protocol ISR intermediate session routing LAN local area network LEN low-entry networking LLC logical link control LU logical unit MAC media access c ontrol MDS multiple domain support MIB Management Information Base NCP Network Control Program

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Preface

NN network node NNS network node server PCID procedure correlation identifier PU physical unit RSCV route selection control vector RTP Rapid Transport Protocol SAP service access point SATF shared access transport facility SDLC Synchronous Data Link Control SNA Systems Network Architecture SNMP Simple Network Management Protocol SRB source routing bridge SSCP system services contr ol point TG transmission group TPF transmission pri ority field VRN virtual routing node VTAM Vir tual T ecommunications Access Method XID exchange identifi cation

Bay Netwo rks Technical Publicati o ns

You can now print Bay Networks technical manuals and release notes free, directly from the Int ernet. Go to support.bayn etworks.com/libr ary/tpubs/. Fi nd the Bay Networks product for which you need doc umenta tion. Then locate the specific category and model or version for your hardwa re or software product. Using Adobe Acrobat Reader, you can open the manuals and release notes, search for the sections you need, and print them on most standard printers. You can download Acrobat Reader free from the Adobe Systems Web site, www.adobe.com.

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Configu ring APPN Service s

You can purchase Bay Networks documentation sets, CDs, and selected technic al publications through the Bay Networks Collateral Catalog. The catalog is located on the World Wide Web at support.bayne tworks.com/catalog.html and is divided into sections arran ged alphabetically:

• The “CD RO Ms” section lists available CDs.

• The “Guides/Books” section lists books on technical topics.

• The “Technical Manuals” section lists available printed documentation sets. Make a note of the part num bers and prices of the items that you want to order.

Use the “Marketing Collateral Catalog description” link to place an order and to print the order form.

How to Get Help

For product assista nce, support contracts, or information about educational services, go to the following URL:

http://www.baynetworks.com/corporate/contacts/

xviii

Or telephone the Bay Networks Technical Solutions Center at: 800-2LANWAN

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Chapter 1

Advanced Peer-to-Peer Networking Overview

IBM Advanced Peer-to-Peer Netw or king (A PP N ) architecture concepts include:

• APPN node types

• Control points and logical units

• Dependent logical unit requester and server

• APPN interfaces, ports, and link stations

• Connection networks

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• Intermediate session routing

• High performance ro utin g

• APPN services Review these concepts if you a re responsible for configuring APPN on Bay

Networks routers in your netw ork. If you are already familiar with A PPN concepts, go directly to Chapter 2

for information on starti ng APPN on a router.

1-1

Configu ring APPN Service s

APPN Networkin g Overview

APPN is an archit ectural extension of IBM Systems Network Architectur e ( SN A). As participan ts in an SNA network, APPN nodes use distributed network services for dynamic routing , connecti on, topolog y, and directory information, simplifying network definition and maintenance.

Bay Networks routers participate as APPN network nodes in IBM SNA netw ork environments (with or without the presence of an IBM mainframe c omputer) and communicate with adjacent network nodes, end nodes, and low-entry ne tworking nodes. APPN runs on al l Bay Netw orks r outer platfor ms using lo cal and wid e area network facilities, as follows:

• LLC2 media, including Ethernet, token ring, and frame relay

• LLC2 using Source Routing Bridge (SRB) encapsulation formats over Ethernet, FDDI, SMDS, frame relay, and Point-to-Point (PPP) protocols

• SDLC links in point-to-point and multipoint c onfigurations

The Bay Networks APPN implementation complies with Ve rsion 2 of the IBM APPN Network Node specification, with advanced optional APPN function sets.

APPN Node Type s

1-2

APPN supports the following node types:

• Network nodes

• End nodes

• Low-entry networking nodes

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Network Nodes

Network nodes (NNs) pro vide routing and networking services to othe r network nodes and end nodes. These services include locating network resources, calculating route s, and routing sessions. NNs use conf igured or dynamic control-point- to-control-point (CP-C P) sessions with adjacent nodes to manage, communicate, and exchange network topology and resour ce inf ormation. Any adjacent node that does not support control point sessions (such a s a low-entry networking node) can not participate in this exchange and must rely on static definit ions. An NN that provides control point services to end nodes is called a network node server (NNS).

End Nodes

End nodes (ENs) ha ve contr ol points tha t allo w them to re gist er and share network information (using CP-CP sessions) with the NNS. End nodes provide APPN services to local users and applications and can ope rate independently in sim ple network configurations. In most configurations, end nodes a re application hosts and workstations tha t register their resources with their network node server.

Advanced Peer-to-Peer Networking Overview

Low-Entry Networking Nodes

Low-entry ne tworking nodes (LENs) are the simplest type of node in an APPN network. LEN nodes communicate with each other as adjacent peers.

LENs do not use control point se ssions an d cannot e xchange r esource inf ormation with an NN. Therefore, the resource information for LENs is preconfigur ed and supported at the NN. LENs typically include personal computers and workstations.

Figure 1-1

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illustrates a simple APPN networ k with the three APPN node types.

1-3

Configu ring APPN Service s

Low-entry networking

node (LEN)

APPN network node

(NN)

AS/400 end node

(EN)

Low-entry networking

node (LEN)

APN0001A

Figure 1-1. APPN Network with Different Node Types

1-4

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Control Points and Logical Units

APPN uses control points (CPs) to manage node s and network resources by establishing CP-CP sessions between nodes. All CP-CP sessions use logical unit (LU) 6.2 sessions.

Advanced Peer-to-Peer Networking Overview

During a CP-CP session (Figure 1-2 information. Network nodes use CP-CP sessions to keep track of the network topology and directo ry information. Adjacent end nodes use CP-CP sessions to register resources and to request directory searc hes from the NNS.

Network node

APPN.A

CP-CP, LU-LU sessions

Figure 1-2. CP-CP and LU-LU Sessions

Network node

), adjacent nodes exchang e network

End node

APPN.C

APPN.B

CP-CP, LU-LU sessions

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In Figure 1-2, APPN.C registers its local resources with APPN.B, and sends requests to APPN.B for information abou t the network and its resour ces . APPN.B functions as a n NNS for APPN.C.

APPN.B has CP-CP sessions with both APPN.A and APPN.C. In this example, APPN.A and APPN.B exchange network topology and cooperate in directory searches.

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Configu ring APPN Service s

Dependent Logical Unit Requester and Server

APPN’s Dependent Logical Unit Requester (DLUR) supports LU type 0, 1, 2, 3 and LU6.2 dependent logical units within APPN. In contrast to the base APPN architecture, which uses independent LUs for LU-to-LU sessions, dependent LUs need a mainframe-based system services control point (SSCP) to establish and manage LU-to-LU sessions. DLUR allo ws these dependent LUs to use APPN networks by encapsulating the SSCP control flows within the APPN LU 6.2 sessions. The AP PN network routes the dependent LU-LU data flows.

DLUR works with the dependent LU server (DLUS) component of the virtual telecommunications a ccess method (VTAM) to provide a path for SSCP flows between VTAM and dependent LUs across an arbitrary APPN backbone network. The DLUR node serves as a point of connection for PU2.0 devices (such as 3270-type devices) to attach to an APPN backbone.

The DLUR and DLUS components in an APPN network allow the SSCP and the PU2.0 device to exchange control flows across the APPN backbone. DLUR and DLUS form a tunne l (called a CP-SVR pipe) that allows the SSCP at the DLUS side of the pipe to send SNA control flows to the PU2.0 device at the DLUR side of the pipe. The CP-SVR pipe is a pair of LU6.2 sessions that encapsulate the SSCP control flows.

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Figure 1-3

illustrates the DLUR and DLUS components in APPN.

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SSCP sessions

(encapsulated in

CP-SVR pipe

PU2.0

LU-LU sessions

(natively routed by

APPN network)

APPN network node

with DLUR

Figure 1-3. DLUR and DLUS in an APPN Network

Typically, in a large network, multip le DLUS nodes serv e many DLUR nodes distributed across the APPN backbone. A DLUR node can establish pipes with seve ral DLUS nodes, altho ugh a single PU2.0 dev ice can recei v e traffic from only one of them, because the device is only controlled by a single SSCP.

CP-SVR pipe

VTAM

with DLUS

APPN

backbone

VTAM

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When the SSCP and the PU2.0 device excha nge control flows, BINDs establish the path that the LU-LU session traf fic uses through the network. Since the BIND flows independe ntly of the CP-SVR pipe, the LU-LU traffic can take a different path through the network ( the DLUS calculates a route using the topology database and class of service [COS] definitions). Refer to the “ APPN Services” section in this chapter for information on the topology database and COS definitions.

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Configu ring APPN Service s

lnterfaces, Ports, and Link Stations

APPN configurat ions comprise interfaces, ports, an d link stations. Figure 1-4 shows ho w interfaces, ports, and li nk stat ions in a simple APPN network relate.

In this guide, the term “interface” has the same meaning as data link

Note:

control (DLC) in IBM publicatio ns.

APPN.NNA

Interface E51,LLC2,DLC00001

PORT0001

Link Station 1

Link Station 2

Link Station 3

Figure 1-4. Interface, Port, and Link Station Relationship

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APPN.ENB

APPN.LENC

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Interfaces

Ports

Advanced Peer-to-Peer Networking Overview

Interfaces provide data link control (DLC) processes to ensure reliable deli v ery of information between adjacent stations using a specific data link protocol, such as LLC or SDLC.

Each APPN interface can support one or more ports. A system-assigned DLC number (su ch as DLC00008 ) identifies APPN interfaces

on Bay Networks network nodes. For informatio n on adding and enabling APPN interfaces on Bay Networks

network nodes, refer to Chapter 2.

A port provides a unique acc ess point (such as a MAC/SAP address pair ) used by the local Bay Networks network node. A port in an APPN network ha s a DLC process and a set of configurable parameters.

Link Stations

A link station is a logical connection between adjacent nodes. Link stations use ports to create this conne cti on. Multiple link stations can exist on a single port, and multiple link stati ons can exist between the same two nodes. You can configure a link st ation e ntry, or APPN creates it dynamicall y when a re mote node initiates a connect ion.

Note:

adjacent link stations to communicate. Wi thin APPN, a link ref ers to a logical connection between tw o nodes. The term tra nsmission group ( TG) is also used throughout this manual and has the same meaning as link.

Link stations ha ve a set of configurable paramet ers, such as:

• Link station name and the name of the adjacent node

• Adjacent link station role: primary, secondary, or ne gotiable

• Adjacent link station definitions, such as MAC and SAP addresses

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The term link often refers to the physical components that enable two

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Configu ring APPN Service s

Connection Netw o rks

APPN end nodes on a share d access tr ansport facility (SATF), such as a token ring network, are directly connected to each other; they can communicate with each other without having to route traffic through an intermediate net wor k node. However, these end node s still require definitions to other nodes and the nodes must be accessible over CP-CP sessions. A connection network (CN) simplifies APPN configurations by reducing the number of connections that you m ust configure between nodes on an SATF.

When two nodes on the same SATF exist on the same connection network, these nodes are unaware that they have a direct conne ction to each other; the NNS, acting as an APPN vi rtual r outing node (VRN), c alcula tes a rou te bet ween the t wo end nodes so that they can communicate directly. For the end nodes to communicate with each other over a connection network, the end nodes require a connection to the VRN and a connection to the NNS.

Figure 1-5

such as that betwee n EN2 and EN3, may use resou rces at the networ k node ( NN1) to establish sessions with each other.

illustrates a sample connec tion network. This connection net work,

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EN2 EN3

Traffic

SATF

Virtual Routing

Node

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NN1 EN4

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Figure 1-5. Sample APPN Connection Network

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Configu ring APPN Service s

Intermediate Session Routing

Intermediate sess ion routing (ISR) provides a reli abl e, connection-oriented, LU-LU session path between nonadja cent APPN nodes . I SR sessi on connectors (SCs) and a session connection manager (SCM) forward sessions through the intermediate network node (Figure 1-6

At session endpoints, the LU, with control point services, establishes a session with a session partner and route s session data back and forth with the partner LU. INTERMEDIATE network nodes do not control the LU endpoints, and LU services cannot be invoked on these nodes. ISR forwards session data to the next node along the session path.

Intermediate

LU-A to LU-C

Session

Network Node B

NNB

End Node C

LU-C

Network Node A

LU-a

ISR Services

LU-A to LU-C

Session

Figure 1-6. Nonadjacent LU-LU Session Through an Intermediate Node

In Figure 1-6, LU-A and LU-C are nonadjacent session partners. ISR at NNB forwards session data between the nonadjacent nodes, LU-A and LU-C. NNB creates a session connec tor (SC) for each session passing through it.

Figure 1-7

illustrates ISR funct ion placement in the SNA layered architecture. Routing takes place at the SNA Layer 4, called the Transmission Control layer. Layer 4 performs flow co ntrol operations, specifically segmentation and reassembly, and pacing.

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Avaya Configuring APPN User Manual

Configuring APPN Services

Contents

Figures

Tables

Before You Begin

Preface

Text Conventions

Acron yms

Bay Netwo rks Technical Publicati o ns

How to Get Help

APPN Networkin g Overview

APPN Node Type s

Network Nodes

End Nodes

Low-Entry Networking Nodes

Control Points and Logical Units

Dependent Logical Unit Requester and Server

lnterfaces, Ports, and Link Stations

Interfaces

Ports

Link Stations

Connection Netw o rks

Intermediate Session Routing