Avaya Configuring OSI Services Uživatelský manuál

BayRS Version 14.00Part No. 308637-14.00 Rev 00September 19994401 Great America ParkwaySanta Clara, CA 95054Configuring OSI Services

Configuring OSI ServicesA-6308637-14.00 Rev 00Class C:• The three highest-order bits are set to 1-1-0.• 21 bits define the network number.• 8 bits def

IP-to-X.121 Address Mapping for DDN308637-14.00 Rev 00A-7 Standard IP to X.121 Address MappingThis section describes the algorithm that you use to con

Configuring OSI ServicesA-8308637-14.00 Rev 00Example For h > or = 64:If the host field (h) is greater than or equal to 64, the address corresponds

IP-to-X.121 Address Mapping for DDN308637-14.00 Rev 00A-9 ExampleWhere r = h * 256 + iClass B For Class B IP addresses, the h and i fields will always

Configuring OSI ServicesA-10308637-14.00 Rev 00Where r = h * 256 + iClass CFor Class C IP addresses, the h and i fields will always consist of 4 bits,

308637-14.00 Rev 00B-1 Appendix BUsing the Technician Interfaceosi lsp CommandThe Technician Interface osi lsp command displays all, or a subset of, t

Configuring OSI ServicesB-2308637-14.00 Rev 00-n <nbr_id>Displays those LSP elements that contain the specified nbr_id. The nbr_id is a 7-byte v

Using the Technician Interface osi lsp Command308637-14.00 Rev 00B-3 When you omit the -f option (which is the default), the output includes the follo

Configuring OSI ServicesB-4308637-14.00 Rev 00With the -f option specified, output includes the information in the previous output table on page B-3 a

Using the Technician Interface osi lsp Command308637-14.00 Rev 00B-5 The following example shows the output that displays when you specify the -f opti

308637-14.00 Rev 00xiTablesTable 1-1. OSI Reference Model and Common ISO Standards ...1-3Table 1-2. NSAP Address Structur

Configuring OSI ServicesB-6308637-14.00 Rev 00Total LSPs = 5OSI LEVEL 2 LSP DATABASEID SEQ_NUM TTL LEN CKSUM0606060606060000 00000004 0472 003A 3778AR

308637-14.00 Rev 00C-1 Appendix CEnabling the wfOsiFletchRelaxedEnableAttribute Using the Technician InterfaceWhen an OSI LSP packet is transmitted, a

308637-14.00 Rev 00D-1 Appendix DSite Manager ParametersThis appendix contains parameter descriptions for OSI and TARP parameters.OSI Global Parameter

Configuring OSI ServicesD-2308637-14.00 Rev 00Parameter: Router TypePath: Configuration Manager > Protocols > OSI > GlobalDefault: Level 1 an

Site Manager Parameters308637-14.00 Rev 00D-3 Parameter: Router ID (hex)Path: Configuration Manager > Protocols > OSI > GlobalDefault: The ro

Configuring OSI ServicesD-4308637-14.00 Rev 00Parameter: Max # Area AddressesPath: Configuration Manager > Protocols > OSI > GlobalDefault: 6

Site Manager Parameters308637-14.00 Rev 00D-5 Parameter: Max # L2 Intermediate SystemsPath: Configuration Manager > Protocols > OSI > GlobalD

Configuring OSI ServicesD-6308637-14.00 Rev 00Parameter: L1 LSP PasswordPath: Configuration Manager > Protocols > OSI > GlobalDefault: NoneOp

Site Manager Parameters308637-14.00 Rev 00D-7 Parameter: L2 LSP PasswordPath: Configuration Manager > Protocols > OSI > GlobalDefault: NoneOp

Configuring OSI ServicesD-8308637-14.00 Rev 00Parameter: Area Address (hex)Path: Configuration Manager > Protocols > OSI > GlobalDefault: 0x4

Site Manager Parameters308637-14.00 Rev 00D-9 Parameter: Max # Learned End SystemsPath: Configuration Manager > Protocols > OSI > GlobalDefau

Configuring OSI ServicesD-10308637-14.00 Rev 00OSI Interface ParametersThis section describes the OSI interface parameters.Parameter: CLNP Source Rout

Site Manager Parameters308637-14.00 Rev 00D-11 Parameter: Routing LevelPath: Configuration Manager > Protocols > OSI > InterfacesDefault: Lev

Configuring OSI ServicesD-12308637-14.00 Rev 00Table D-1. Suggested OSI Circuit Cost ValuesSpeed Cost Speed Cost100 Mb/s 1 64 Kb/s 5416 Mb/s 19 56 Kb/

Site Manager Parameters308637-14.00 Rev 00D-13 Parameter: L1 Designated Router PriorityPath: Configuration Manager > Protocols > OSI > Interf

Configuring OSI ServicesD-14308637-14.00 Rev 00Parameter: L2 Designated Router PriorityPath: Configuration Manager > Protocols > OSI > Interf

Site Manager Parameters308637-14.00 Rev 00D-15 Parameter: ISH Hello TimerPath: Configuration Manager > Protocols > OSI > InterfacesDefault: 3

Configuring OSI ServicesD-16308637-14.00 Rev 00Parameter: Circuit PasswordPath: Configuration Manager > Protocols > OSI > InterfacesDefault:

Site Manager Parameters308637-14.00 Rev 00D-17 Manual Area Address ParameterThis section describes the Area Address parameter.Parameter: Redirect Enab

308637-14.00 Rev 00xiii PrefaceThis guide describes Open Systems Interconnection (OSI) architecture and services and what you do to start and customiz

Configuring OSI ServicesD-18308637-14.00 Rev 00Static End System Adjacency ParametersThis section describes the static end system adjacency parameters

Site Manager Parameters308637-14.00 Rev 00D-19 Static External Address Adjacency ParametersThis section describes the static external address adjacenc

Configuring OSI ServicesD-20308637-14.00 Rev 00Parameter: External Address (hex)Path: Configuration Manager > Protocols > OSI > Interfaces &g

Site Manager Parameters308637-14.00 Rev 00D-21 Static Route ParametersThis section describes the static route parameters.Parameter: External Address M

Configuring OSI ServicesD-22308637-14.00 Rev 00Parameter: Destination NSAP Address (hex)Path: Configuration Manager > Protocols > OSI > Stati

Site Manager Parameters308637-14.00 Rev 00D-23 TARP Global ParametersThis section describes the TARP global parameters.Parameter: Default Route Metric

Configuring OSI ServicesD-24308637-14.00 Rev 00Parameter: EnablePath: Configuration Manager > Protocols > OSI > Tarp > GlobalDefault: Enab

Site Manager Parameters308637-14.00 Rev 00D-25 Parameter: Pkt LifetimePath: Configuration Manager > Protocols > OSI > Tarp > GlobalDefault

Configuring OSI ServicesD-26308637-14.00 Rev 00Parameter: Tarp L2 Data CachePath: Configuration Manager > Protocols > OSI > Tarp > GlobalD

Site Manager Parameters308637-14.00 Rev 00D-27 TARP Circuit ParametersThis section describes the TARP circuit parameters.Parameter: Tarp T3 TimerPath:

Configuring OSI Servicesxiv308637-14.00 Rev 00Text ConventionsThis guide uses the following text conventions:angle brackets (< >) Indicate that

Configuring OSI ServicesD-28308637-14.00 Rev 00TARP Static Adjacency ParametersThis section describes the TARP static adjacency parameters.Parameter:

Site Manager Parameters308637-14.00 Rev 00D-29 TARP Ignore Adjacencies ParametersThis section describes the TARP ignore adjacency parameters.Parameter

308637-14.00 Rev 00Index-1Aacronyms, xvaddress conversion, IP to X.121, A-1addressing authority, 1-6administrative domain, 1-4ANSI, 1-6area addressdes

Index-2308637-14.00 Rev 00external domain, 2-7external routing level, 2-7Fforwarding router process, 1-21frame relay, 2-8 to 2-14Gglobal parametersAre

308637-14.00 Rev 00Index-3Nneighbor detection, 2-14network addressing domain, 1-6NSAP addressarea address, 1-12 to 1-13authority and format identifier

Index-4308637-14.00 Rev 00interfaceCircuit Password, D-16Enable, D-10ESH Configuration Time, D-15IIH Hello Timer, D-14IIH Hold Time Multiplier, D-16IS

308637-14.00 Rev 00Index-5static route parametersDefault Route Metric, D-23Destination NSAP Address, D-22Enable, D-21Next Hop IS NSAP Address, D-22Rou

Preface308637-14.00 Rev 00xv AcronymsThis guide uses the following acronyms:screen text Indicates system output, for example, prompts and system messa

Configuring OSI Servicesxvi308637-14.00 Rev 00FTAM File Transfer and Access ManagementGOSIP Government OSI ProtocolGSA General Services Administration

Preface308637-14.00 Rev 00xvii Hard-Copy Technical ManualsYou can print selected technical manuals and release notes free, directly from the Internet.

Configuring OSI Servicesxviii308637-14.00 Rev 00How to Get HelpIf you purchased a service contract for your Nortel Networks product from a distributor

308637-14.00 Rev 001-1 Chapter 1OSI OverviewThis chapter provides a general overview of OSI networking and describes how OSI routing services for Nort

ii308637-14.00 Rev 00 Copyright © 1999 Nortel NetworksAll rights reserved. Printed in the USA. September 1999.The information in this document is subj

Configuring OSI Services1-2308637-14.00 Rev 00OSI Basic Reference ModelOSI is a nonproprietary distributed processing architecture. The International

OSI Overview308637-14.00 Rev 001-3 Table 1-1. OSI Reference Model and Common ISO StandardsOSI Network OrganizationAn OSI network is made up of end sys

Configuring OSI Services1-4308637-14.00 Rev 00• Intermediate systems originate and receive data, as well as forward (route) data. The Nortel Networks

OSI Overview308637-14.00 Rev 001-5 You can configure a Nortel Networks router running OSI to function as an L1 router, an L2 router, or an L1/L2 route

Configuring OSI Services1-6308637-14.00 Rev 00Level 2 RoutingLevel 2 routing exchanges data with systems located in a different area. In addition, L2

OSI Overview308637-14.00 Rev 001-7 Figure 1-3. Hierarchical Addressing Authority Structure NSAP StructureThe basic NSAP address structure reflects the

Configuring OSI Services1-8308637-14.00 Rev 00Figure 1-4. Basic NSAP Address StructureThe IDP consists of an Authority and Format Identifier (AFI) and

OSI Overview308637-14.00 Rev 001-9 Figure 1-5. GOSIP NSAP Address FormatThe AFI for these NSAP addresses is 47, which shows that the network belongs t

Configuring OSI Services1-10308637-14.00 Rev 00Similarly, if you register your OSI network with ANSI, it is assigned to the ISO Data Country Code (DCC

OSI Overview308637-14.00 Rev 001-11 Figure 1-6. ANSI NSAP Address FormatThe AFI for these NSAP addresses is 39, which shows that the network is regist

308637-14.00 Rev 00iiiNortel Networks NA Inc. Software License AgreementNOTICE: Please carefully read this license agreement before copying or using t

Configuring OSI Services1-12308637-14.00 Rev 00The IDP and the first part of the DSP (called the high-order part of the DSP) are the NSAP’s area addre

OSI Overview308637-14.00 Rev 001-13 Figure 1-7. NSAP Area Address When a router receives a packet, it examines the contents of the packet’s NSAP desti

Configuring OSI Services1-14308637-14.00 Rev 002.Assigned identifiers to the campus routing domain and local areas as follows: Campus Routing Domain I

OSI Overview308637-14.00 Rev 001-15 Because Area A and Area B are not linked to any areas outside of the campus routing domain, the administrator obta

Configuring OSI Services1-16308637-14.00 Rev 00Figure 1-9. Assigning NSAP AddressesSimilarly, after receiving the AAI for the campus network from the

OSI Overview308637-14.00 Rev 001-17 OSI Basic Routing AlgorithmThe OSI routing algorithm is based on link state information. Each OSI router periodica

Configuring OSI Services1-18308637-14.00 Rev 00Update ProcessIn an OSI network, every router must decide which systems it can reach directly. It finds

OSI Overview308637-14.00 Rev 001-19 OSI routers generate LSPs periodically and also when there is a change in the network topology. For example, in Fi

Configuring OSI Services1-20308637-14.00 Rev 00The router refers to its link state databases when deciding the shortest path between itself and all ot

OSI Overview308637-14.00 Rev 001-21 Figure 1-11. Lowest Cost Path (Router A to B to ES)Once the router determines the lowest-cost path to a destinatio

iv308637-14.00 Rev 00for the security of its own data and information and for maintaining adequate procedures apart from the Software to reconstruct

Configuring OSI Services1-22308637-14.00 Rev 00• When an L1/L2 router receives a packet, it checks its L2 forwarding database to see which L1/L2 route

OSI Overview308637-14.00 Rev 001-23 A router partitions a CLNP packet into two or more new packets (segments) if the size of the packet is greater tha

Configuring OSI Services1-24308637-14.00 Rev 00End systems generate Hello packets that contain the end system’s subnetwork address, and specify which

OSI Overview308637-14.00 Rev 001-25 Figure 1-12. Route RedirectingIf the next hop is either a destination system or another router on the same subnetw

Configuring OSI Services1-26308637-14.00 Rev 00The router sends the RD packet back to the originating end system, which has the option of using the RD

OSI Overview308637-14.00 Rev 001-27 For example, when an L1 router receives a data packet, it compares the destination area address in the packet with

Configuring OSI Services1-28308637-14.00 Rev 00Inter-Domain RoutingInter-domain routing is possible when paths to other domains are statically defined

OSI Overview308637-14.00 Rev 001-29 How TARP WorksTARP resolves the NSAP-to-TID mapping by flooding requests that network management stations originat

Configuring OSI Services1-30308637-14.00 Rev 00TARP Packet FieldsEach TARP packet includes the following fields (Table 1-6):Table 1-6. TARP Packet Fie

OSI Overview308637-14.00 Rev 001-31 Originating TARP RequestsFor the router to act as a TARP client, it must be able to originate all five types of pa

308637-14.00 Rev 00vContents PrefaceBefore You Begin ...

Configuring OSI Services1-32308637-14.00 Rev 00Receiving TARP RequestsAfter OSI processes an inbound OSI packet and determines that it is a TARP packe

OSI Overview308637-14.00 Rev 001-33 Loop DetectionTo prevent TARP storms and recursive loops in a looped topology, TARP maintains a loop detection buf

Configuring OSI Services1-34308637-14.00 Rev 00Flush TimerThe loop detection buffer also has a flush timer. When it expires, TARP empties the entire b

308637-14.00 Rev 002-1 Chapter 2OSI Implementation NotesThis chapter contains information about configuring Nortel Networks routers with special netwo

Configuring OSI Services2-2308637-14.00 Rev 00Configuring Manual Area AddressesManual area addresses are synonymous area addresses configured on the s

OSI Implementation Notes308637-14.00 Rev 002-3 Figure 2-2. Manual Area Address 456 Assigned to All Routers in Area XY2.Assign the area address 456 to

Configuring OSI Services2-4308637-14.00 Rev 00Figure 2-3. Manual Area Address 456 Assigned to Specific End Systems3.Finally, to divide area XY complet

OSI Implementation Notes308637-14.00 Rev 002-5 Figure 2-4. Area XY Divided into Area X and Area YFor instructions on how to configure manual area addr

Configuring OSI Services2-6308637-14.00 Rev 00Figure 2-5 demonstrates an improper network design. Figure 2-5. Routers B and C in an Area Partition Due

OSI Implementation Notes308637-14.00 Rev 002-7 Configuring Static External AdjacenciesA static external adjacency links an L1/L2 router to an address

vi308637-14.00 Rev 00Intermediate System to Intermediate System Intra-Domain Routing Exchange Protocol ...

Configuring OSI Services2-8308637-14.00 Rev 00Configuring DECnet IV to V TransitionYou can only access the DECnet IV to V Transition parameters using

OSI Implementation Notes308637-14.00 Rev 002-9 Frame Relay Circuit ModesThe Nortel Networks implementation of OSI over frame relay operates as a subne

Configuring OSI Services2-10308637-14.00 Rev 00OSI point-to-point operation over frame relay uses circuit bandwidth more efficiently than OSI broadcas

OSI Implementation Notes308637-14.00 Rev 002-11 Mixed Access You can mix both group and direct access mode in a configuration as long as you do not vi

Configuring OSI Services2-12308637-14.00 Rev 00Figure 2-9. Full Mesh TopologyIf a router fails or the link to the frame relay network fails, the topol

OSI Implementation Notes308637-14.00 Rev 002-13 Figure 2-10. Partial Mesh in Hub and Spoke TopologyA PVC that goes down will only cause communication

Configuring OSI Services2-14308637-14.00 Rev 00Designated Router SelectionOSI over group access frame relay uses the highest system ID for designated

OSI Implementation Notes308637-14.00 Rev 002-15 To configure OSI to run over ATM:Site Manager ProcedureYou do this System responds1. In the Configurat

Configuring OSI Services2-16308637-14.00 Rev 0016. Set the VPI Number parameter. Click on Help for more information.17. Set the VCI Number parameter.

308637-14.00 Rev 003-1 Chapter 3Enabling OSI and TARP ServicesThis chapter describes how to enable OSI and TARP by specifying values for required para

308637-14.00 Rev 00viiIS Neighbor Detection ...2-14Circuits p

Configuring OSI Services3-2308637-14.00 Rev 00OSI and TARP services are now enabled with default parameter values. To customize any of these values, s

308637-14.00 Rev 004-1 Chapter 4Editing OSI and TARP ParametersAfter you enable an OSI interface, you can use Site Manager to edit OSI parameters and

Configuring OSI Services4-2308637-14.00 Rev 00Accessing OSI ParametersYou access all OSI parameters from the Configuration Manager window (Figure 4-1)

Editing OSI and TARP Parameters308637-14.00 Rev 004-3 For each OSI and TARP parameter, this chapter describes the default setting, all valid setting o

Configuring OSI Services4-4308637-14.00 Rev 00Editing OSI Global ParametersTo edit the OSI global parameters:Site Manager ProcedureYou do this System

Editing OSI and TARP Parameters308637-14.00 Rev 004-5 Editing OSI Interface ParametersTo edit an OSI interface:Site Manager ProcedureYou do this Syste

Configuring OSI Services4-6308637-14.00 Rev 00Configuring Manual Area AddressesManual area addresses are synonymous area addresses configured on the s

Editing OSI and TARP Parameters308637-14.00 Rev 004-7 Deleting a Manual Area AddressTo delete a manual area address:Site Manager ProcedureYou do this

Configuring OSI Services4-8308637-14.00 Rev 00Configuring Static End System AdjacenciesYou must define a static end system adjacency with any end syst

Editing OSI and TARP Parameters308637-14.00 Rev 004-9 Copying a Static End System AdjacencyTo copy a static end system adjacency:3. Click on OK. The n

viii308637-14.00 Rev 00Viewing TARP Data Caches Using the Technician Interface ...4-23Deleting OSI from the Rout

Configuring OSI Services4-10308637-14.00 Rev 00Editing a Static End System AdjacencyTo edit a static end system adjacency:Site Manager ProcedureYou do

Editing OSI and TARP Parameters308637-14.00 Rev 004-11 Deleting a Static End System AdjacencyTo delete a static end system adjacency:Configuring Stati

Configuring OSI Services4-12308637-14.00 Rev 00Continue to the following sections for instructions on adding, copying, editing, or removing external a

Editing OSI and TARP Parameters308637-14.00 Rev 004-13 Editing Static External Address AdjacenciesTo edit a static external address adjacency:3. Speci

Configuring OSI Services4-14308637-14.00 Rev 00Deleting Static External Address AdjacenciesTo delete a static external address adjacency:Configuring S

Editing OSI and TARP Parameters308637-14.00 Rev 004-15 Adding Static RoutesTo add a static route:Copying Static RoutesTo copy a static route, complete

Configuring OSI Services4-16308637-14.00 Rev 00Editing Static RoutesTo edit a static route:Deleting Static RoutesTo delete a static route:Site Manager

Editing OSI and TARP Parameters308637-14.00 Rev 004-17 Configuring TARPYou can use Site Manager to configure TARP parameters. However, to originate TA

Configuring OSI Services4-18308637-14.00 Rev 00Editing TARP Global ParametersTo edit TARP global parameters, complete the following tasks: Site Manage

Editing OSI and TARP Parameters308637-14.00 Rev 004-19 Editing TARP Circuit ParametersTo edit TARP circuit parameters:Configuring TARP Static Adjacenc

308637-14.00 Rev 00ixFiguresFigure 1-1. OSI Network Organization ...1-4Figure 1-2.

Configuring OSI Services4-20308637-14.00 Rev 00Deleting TARP Static AdjacenciesTo delete a TARP static adjacency:3. Set the Static Adjacent NSAP Addre

Editing OSI and TARP Parameters308637-14.00 Rev 004-21 To enable or disable a TARP Static Adjacency setting:Site Manager ProcedureYou do this System r

Configuring OSI Services4-22308637-14.00 Rev 00Configuring TARP to Ignore a Static AdjacencyTo configure TARP to ignore a defined static adjacency: To

Editing OSI and TARP Parameters308637-14.00 Rev 004-23 To enable or disable a TARP Ignore Adjacency setting:Sending TARP Requests Using the Technician

Configuring OSI Services4-24308637-14.00 Rev 00Deleting OSI from the RouterTo delete the OSI routing protocol from all router circuits on which it is

308637-14.00 Rev 00A-1 Appendix AIP-to-X.121 Address Mapping for DDNThis appendix describes how to convert an IP address to an X.121 address if you ar

Configuring OSI ServicesA-2308637-14.00 Rev 00IP-to-X.121 Address Mapping This section defines a standard way of converting IP addresses to CCITT (now

IP-to-X.121 Address Mapping for DDN308637-14.00 Rev 00A-3 BackgroundAll Internet hosts are assigned a four-octet (32-bit) address composed of a networ

Configuring OSI ServicesA-4308637-14.00 Rev 00The different classes of Internet addresses* are illustrated:Class A:• The highest-order bit is set to 0

IP-to-X.121 Address Mapping for DDN308637-14.00 Rev 00A-5 Class B:• The two highest-order bits are set to 1-0.• 14 bits define the network number.• 16