Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Manuel d'utilisateur

BayRS Version 14.00Part No. 308628-14.00 Rev 00September 19994401 Great America ParkwaySanta Clara, CA 95054Configuring IP Exterior Gateway Protocols

x 308628-14.00 Rev 00Static Route Parameters ... A-51Adjacent H

Configuring IP Exterior Gateway Protocols (BGP and EGP)6-6308628-14.00 Rev 00Negotiating the BGP VersionBGP peers negotiate the version of BGP that th

Establishing a Peer-to-Peer Session308628-14.00 Rev 006-7 Using Site ManagerKeeping the Connection AliveAfter a session has been established, BGP peer

Configuring IP Exterior Gateway Protocols (BGP and EGP)6-8308628-14.00 Rev 00Using the BCCNavigate to a BGP peer prompt and enter:keepalive <second

Establishing a Peer-to-Peer Session308628-14.00 Rev 006-9 Setting the External Advertisement TimerAfter a connection is established, the BGP speaker u

Configuring IP Exterior Gateway Protocols (BGP and EGP)6-10308628-14.00 Rev 00Specifying a Holddown TimeThe holddown time is the amount of time either

Establishing a Peer-to-Peer Session308628-14.00 Rev 006-11 Using the BCCNavigate to a BGP peer-specific prompt and enter:holddown <seconds>secon

Configuring IP Exterior Gateway Protocols (BGP and EGP)6-12308628-14.00 Rev 00Setting a Minimum AS Origination IntervalBy default, a BGP speaker that

Establishing a Peer-to-Peer Session308628-14.00 Rev 006-13 Using Site ManagerSite Manager ProcedureYou do this System responds1. In the Configuration

Configuring IP Exterior Gateway Protocols (BGP and EGP)6-14308628-14.00 Rev 00Overriding the Local AS NumberBy default, a BGP speaker that issues an o

Establishing a Peer-to-Peer Session308628-14.00 Rev 006-15 Note that if the update message that advertises a single route is larger than the configure

308628-14.00 Rev 00 xiFiguresFigure 1-1. An Internet Connecting Three Autonomous Systems ...1-2Figure 1-2. BGP Connecting

Configuring IP Exterior Gateway Protocols (BGP and EGP)6-16308628-14.00 Rev 00Setting the Route Echo SwitchThe peer route echo switch controls the way

Establishing a Peer-to-Peer Session308628-14.00 Rev 006-17 Using Site ManagerDisabling and Reenabling Loop DetectionBy default, BGP terminates a peer-

Configuring IP Exterior Gateway Protocols (BGP and EGP)6-18308628-14.00 Rev 00For example, the following command disables loop detection on peer-to-pe

Establishing a Peer-to-Peer Session308628-14.00 Rev 006-19 Configuring Peers over an Unnumbered Point-to-Point LinkYou cannot configure a BGP peer-to-

Configuring IP Exterior Gateway Protocols (BGP and EGP)6-20308628-14.00 Rev 00To establish a peer-to-peer session between router A and router B: 1.Cho

Establishing a Peer-to-Peer Session308628-14.00 Rev 006-21 Assigning Weight and Class Values to an ASYou can assign a weight class to any AS number an

Configuring IP Exterior Gateway Protocols (BGP and EGP)6-22308628-14.00 Rev 00You can use Site Manager to assign a weight and a weight class to an AS.

308628-14.00 Rev 007-1 Chapter 7Configuring BGP Accept and Announce PoliciesBGP accept and announce policies govern which routes a router uses and whi

Configuring IP Exterior Gateway Protocols (BGP and EGP)7-2308628-14.00 Rev 00This chapter covers the following topics:Defining a BGP Accept PolicyBGP

Configuring BGP Accept and Announce Policies308628-14.00 Rev 007-3 Using the BCCNavigate to the BGP global prompt and enter:accept <policy_name>

Configuring IP Exterior Gateway Protocols (BGP and EGP)7-4308628-14.00 Rev 00Table 7-1. BCC Definition Parameters for BGP Accept PoliciesParameter Val

Configuring BGP Accept and Announce Policies308628-14.00 Rev 007-5 Using Site ManagerSite Manager ProcedureYou do this System responds1. In the Config

Configuring IP Exterior Gateway Protocols (BGP and EGP)7-6308628-14.00 Rev 00Supplying Modification Values for a BGP Accept PolicyYou can use the BCC

Configuring BGP Accept and Announce Policies308628-14.00 Rev 007-7 For example, the following command specifies override as the method for accept poli

Configuring IP Exterior Gateway Protocols (BGP and EGP)7-8308628-14.00 Rev 00Specifying Matching Criteria for a BGP Accept PolicyYou can use the BCC o

Configuring BGP Accept and Announce Policies308628-14.00 Rev 007-9 Table 7-3. BCC Matching Parameters for BGP Accept PoliciesParameter Values Function

Configuring IP Exterior Gateway Protocols (BGP and EGP)7-10308628-14.00 Rev 00Using Site ManagerSite Manager ProcedureYou do this System responds1. In

Configuring BGP Accept and Announce Policies308628-14.00 Rev 007-11 Defining a BGP Announce PolicyBGP announce policies govern which routes BGP propag

Configuring IP Exterior Gateway Protocols (BGP and EGP)7-12308628-14.00 Rev 00Using Site ManagerTable 7-4. BCC Definition Parameters for BGP Announce

Configuring BGP Accept and Announce Policies308628-14.00 Rev 007-13 7. Set the following parameters:•Name•Networks• Action• Rule Precedence• Route Sou

308628-14.00 Rev 00xiiiTablesTable 1-1. BGP-3 Path Attributes ...1-9Table 1

Configuring IP Exterior Gateway Protocols (BGP and EGP)7-14308628-14.00 Rev 00Supplying Modification Values for a BGP Announce PolicyYou can use the B

Configuring BGP Accept and Announce Policies308628-14.00 Rev 007-15 atomic aggregate automatic (default)forceignoreAllows control over the atomic path

Configuring IP Exterior Gateway Protocols (BGP and EGP)7-16308628-14.00 Rev 00Using Site Manageradvertise* List of IP addressesSpecifies a list of net

Configuring BGP Accept and Announce Policies308628-14.00 Rev 007-17 6. Set the following parameters:• Enable•Name•Networks• Action• Rule Precedence• R

Configuring IP Exterior Gateway Protocols (BGP and EGP)7-18308628-14.00 Rev 00Specifying Matching Criteria for a BGP Announce PolicyYou can use the BC

Configuring BGP Accept and Announce Policies308628-14.00 Rev 007-19 Table 7-6. BCC Match Criteria for BGP Announce PoliciesCriterion Values Functionas

Configuring IP Exterior Gateway Protocols (BGP and EGP)7-20308628-14.00 Rev 00bgp-next-hop* List of IP addressesSpecifies one or more IP addresses. Th

Configuring BGP Accept and Announce Policies308628-14.00 Rev 007-21 network* List of IP addressesSpecifies which networks will match this policy. Each

Configuring IP Exterior Gateway Protocols (BGP and EGP)7-22308628-14.00 Rev 00Using Site ManagerYou can use Site Manager to configure a BGP-4 announce

Configuring BGP Accept and Announce Policies308628-14.00 Rev 007-23 7. Set the following parameters:• Enable•Name•Networks• Action• Rule Precedence• R

Configuring IP Exterior Gateway Protocols (BGP and EGP)7-24308628-14.00 Rev 00Configuring BGP-4 AS Pattern-MatchingTable 7-7 describes the special cha

308628-14.00 Rev 008-1 Chapter 8Configuring a Route ReflectorTo avoid the high cost of a full-mesh topology to support IBGP speakers within a large AS

Configuring IP Exterior Gateway Protocols (BGP and EGP)8-2308628-14.00 Rev 00A route reflector:• Receives route advertisements from RR clients (and ot

Configuring a Route Reflector308628-14.00 Rev 008-3 You configure an IBGP speaker as a route reflector by establishing a peer-to-peer session with an

Configuring IP Exterior Gateway Protocols (BGP and EGP)8-4308628-14.00 Rev 00Using Site ManagerConfiguring a Route Reflector ClusterYou can connect mu

Configuring a Route Reflector308628-14.00 Rev 008-5 Using the BCCTo establish a peer-to-peer session with another route reflector in the same cluster,

Configuring IP Exterior Gateway Protocols (BGP and EGP)8-6308628-14.00 Rev 00Using Site ManagerConfiguring Multiple RR Clusters in an ASAn AS can cont

Configuring a Route Reflector308628-14.00 Rev 008-7 You can use the BCC or Site Manager to perform the following operations:• Associate a route reflec

Configuring IP Exterior Gateway Protocols (BGP and EGP)8-8308628-14.00 Rev 00Using Site ManagerTo establish a peer-to-peer session with a route reflec

Configuring a Route Reflector308628-14.00 Rev 008-9 To associate a route reflector with a cluster, complete the following tasks:Configuring an RR Clie

308628-14.00 Rev 00xv PrefaceRouters at the borders or edges of autonomous systems are called gateways. These gateways use exterior gateway protocols

Configuring IP Exterior Gateway Protocols (BGP and EGP)8-10308628-14.00 Rev 00When the session-specific prompt appears, enter the following command:pe

Configuring a Route Reflector308628-14.00 Rev 008-11 Using Site ManagerSite Manager ProcedureYou do this System responds1. In the Configuration Manage

308628-14.00 Rev 009-1 Chapter 9Configuring Route and Traffic-Load BalancingIBGP route balancing and traffic-load balancing are two techniques that al

Configuring IP Exterior Gateway Protocols (BGP and EGP)9-2308628-14.00 Rev 00Figure 9-1. BGP/OSPF Autonomous SystemAssume for this example that OSPF i

Configuring Route and Traffic-Load Balancing308628-14.00 Rev 009-3 Now consider that BGP on router F receives advertisements to three destinations (de

Configuring IP Exterior Gateway Protocols (BGP and EGP)9-4308628-14.00 Rev 00Figure 9-3 shows the six traffic-balancing BGP ECMP entries to the routin

Configuring Route and Traffic-Load Balancing308628-14.00 Rev 009-5 Using Site ManagerConfiguring EBGP for Route and Traffic-Load BalancingEBGP route b

Configuring IP Exterior Gateway Protocols (BGP and EGP)9-6308628-14.00 Rev 00• The EBGP speaker on the local router and the EBGP speaker on the remote

Configuring Route and Traffic-Load Balancing308628-14.00 Rev 009-7 Now assume that the local EBGP speaker has received from its remote peer advertisem

Configuring IP Exterior Gateway Protocols (BGP and EGP)xvi308628-14.00 Rev 00Text ConventionsThis guide uses the following text conventions:angle brac

Configuring IP Exterior Gateway Protocols (BGP and EGP)9-8308628-14.00 Rev 00For example, the following sequence of BCC commands:1.Configures an IP ci

Configuring Route and Traffic-Load Balancing308628-14.00 Rev 009-9 Using Site ManagerSite Manager ProcedureYou do this System responds1. In the Config

308628-14.00 Rev 0010-1 Chapter 10Customizing EGP ServicesThis chapter explains how to configure the Exterior Gateway Protocol (EGP).Topic PageEGP Con

Configuring IP Exterior Gateway Protocols (BGP and EGP)10-2308628-14.00 Rev 00EGP Concepts and TerminologyEGP-2 is an exterior gateway protocol used t

Customizing EGP Services308628-14.00 Rev 0010-3 An EGP router does the following:• Acquires EGP neighbors• Determines neighbor reachability• Exchanges

Configuring IP Exterior Gateway Protocols (BGP and EGP)10-4308628-14.00 Rev 00In the neighbor reachability phase, EGP is responsible for monitoring an

Customizing EGP Services308628-14.00 Rev 0010-5 EGP Implementation NotesThis section provides you with some important guidelines to follow when you co

Configuring IP Exterior Gateway Protocols (BGP and EGP)10-6308628-14.00 Rev 00Customizing EGP on the RouterYou customize EGP on the router by setting

Customizing EGP Services308628-14.00 Rev 0010-7 Supplying a Local AS NumberEach autonomous system has a NIC-assigned decimal number ID.You must supply

Preface308628-14.00 Rev 00xvii italic text Indicates file and directory names, new terms, book titles, and variables in command syntax descriptions. W

Configuring IP Exterior Gateway Protocols (BGP and EGP)10-8308628-14.00 Rev 00Configuring a NeighborYou define a neighbor-to-neighbor relationship by

Customizing EGP Services308628-14.00 Rev 0010-9 Specifying the Neighbor’s AddressYou define the neighbor-to-neighbor relationship by specifying the IP

Configuring IP Exterior Gateway Protocols (BGP and EGP)10-10308628-14.00 Rev 00Specifying the Gateway ModeYou can configure the EGP router to operate

Customizing EGP Services308628-14.00 Rev 0010-11 Enabling and Disabling the Neighbor RelationshipWhen you establish a neighbor-to-neighbor relationshi

Configuring IP Exterior Gateway Protocols (BGP and EGP)10-12308628-14.00 Rev 00Choosing the Acquisition ModeIn an EGP neighbor relationship, one route

Customizing EGP Services308628-14.00 Rev 0010-13 Choosing the Poll ModeThe type of neighbor reachability algorithm executed by the local EGP neighbor

Configuring IP Exterior Gateway Protocols (BGP and EGP)10-14308628-14.00 Rev 00Setting Neighbor TimersEGP uses two configurable timers: the hello time

308628-14.00 Rev 00A-1 Appendix ASite Manager ParametersThis appendix describes the Site Manager parameters relevant to BGP and EGP.BGP ParametersTopi

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-2308628-14.00 Rev 00BGP Configuration ParametersBGP Global ParametersParameter: IdentifierPat

Site Manager Parameters308628-14.00 Rev 00A-3 Parameter: BGP IdentifierPath: Configuration Manager > Protocols > IP > BGP > BGP GlobalDefa

Configuring IP Exterior Gateway Protocols (BGP and EGP)xviii308628-14.00 Rev 00AcronymsThis guide uses the following acronyms::ARP Address Resolution

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-4308628-14.00 Rev 00Parameter: BGP From ProtocolsPath: Configuration Manager > Protocols &

Site Manager Parameters308628-14.00 Rev 00A-5 Parameter: Detect Redundant ConnectionsPath: Configuration Manager > Protocols > IP > BGP >

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-6308628-14.00 Rev 00Parameter: BGP Dynamic Policy Change SupportPath: Configuration Manager &

Site Manager Parameters308628-14.00 Rev 00A-7 Parameter: Aggregate SubnetsPath: Configuration Manager > Protocols > IP > BGP > BGP GlobalD

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-8308628-14.00 Rev 00Parameter: IBGP ECMP MethodPath: Configuration Manager > Protocols >

Site Manager Parameters308628-14.00 Rev 00A-9 Parameter: Confederation PeerPath: Configuration Manager > Protocols > IP > BGP > BGP Global

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-10308628-14.00 Rev 00BGP-3 Global ParameterBGP-4 Global ParameterBGP Peer ParametersParameter

Site Manager Parameters308628-14.00 Rev 00A-11 Parameter: Peer ASPath: Configuration Manager > Protocols > IP > BGP > PeersDefault: NoneOp

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-12308628-14.00 Rev 00Parameter: EnablePath: Configuration Manager > Protocols > IP >

Site Manager Parameters308628-14.00 Rev 00A-13 Parameter: External Advertisement TimerPath: Configuration Manager > Protocols > IP > BGP >

Preface308628-14.00 Rev 00xix Hard-Copy Technical ManualsYou can print selected technical manuals and release notes free, directly from the Internet.

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-14308628-14.00 Rev 00Parameter: HoldtimePath: Configuration Manager > Protocols > IP &g

Site Manager Parameters308628-14.00 Rev 00A-15 Parameter: Min AS Origination IntervalPath: Configuration Manager > Protocols > IP > BGP >

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-16308628-14.00 Rev 00Parameter: Peer Route Echo SwitchPath: Configuration Manager > Protoc

Site Manager Parameters308628-14.00 Rev 00A-17 Parameter: Next Hop SelfPath: Configuration Manager > Protocols > IP > BGP > PeersDefault:

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-18308628-14.00 Rev 00Parameter: Tcp Md5 Key StoragePath: Configuration Manager > Protocols

Site Manager Parameters308628-14.00 Rev 00A-19 BGP AS Weight and Weight Class ParametersParameter: Tcp Md5 KeyPath: Configuration Manager > Protoco

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-20308628-14.00 Rev 00Parameter: Weight Value 2Path: Configuration Manager > Protocols >

Site Manager Parameters308628-14.00 Rev 00A-21 Parameter: Weight Value 5Path: Configuration Manager > Protocols > IP > BGP > WeightsDefaul

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-22308628-14.00 Rev 00BGP Event Message ParametersParameter: Weight Value 8Path: Configuration

Site Manager Parameters308628-14.00 Rev 00A-23 Parameter: Message LevelPath: Configuration Manager > Protocols > IP > BGP > BGP DebugDefau

ii308628-14.00 Rev 00 Copyright © 1999 Nortel NetworksAll rights reserved. Printed in the USA. September 1999.The information in this document is subj

Configuring IP Exterior Gateway Protocols (BGP and EGP)xx308628-14.00 Rev 00How to Get HelpIf you purchased a service contract for your Nortel Network

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-24308628-14.00 Rev 00EGP ParametersEGP Global Parameters Topic PageEGP Global ParametersA-24E

Site Manager Parameters308628-14.00 Rev 00A-25 EGP Neighbor ParametersParameter: Remote Peer IP AddressPath: Configuration Manager > Protocols >

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-26308628-14.00 Rev 00Parameter: EnablePath: Configuration Manager > Protocols > IP >

Site Manager Parameters308628-14.00 Rev 00A-27 Parameter: Hello TimerPath: Configuration Manager > Protocols > IP > EGP > NeighborsDefault

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-28308628-14.00 Rev 00IP ParametersIP Configuration ParametersTopic PageIP Configuration Param

Site Manager Parameters308628-14.00 Rev 00A-29 Parameter: Subnet MaskPath: Select IP from the Select Protocols window and click on OK.Default: NoneOpt

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-30308628-14.00 Rev 00IP Interface ParametersParameter: Unnumbered Associated AddressPath: Sel

Site Manager Parameters308628-14.00 Rev 00A-31 Parameter: Broadcast AddressPath: Configuration Manager > Protocols > IP > InterfacesDefault:

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-32308628-14.00 Rev 00Parameter: MTU DiscoveryPath: Configuration Manager > Protocols >

Site Manager Parameters308628-14.00 Rev 00A-33 Parameter: ASBPath: Configuration Manager > Protocols > IP > InterfacesDefault: DisabledOption

308628-14.00 Rev 001-1 Chapter 1Exterior Gateway Protocols (BGP/EGP)The following topics introduce concepts and terminology used in this guide:What Ga

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-34308628-14.00 Rev 00Parameter: ProxyPath: Configuration Manager > Protocols > IP >

Site Manager Parameters308628-14.00 Rev 00A-35 Parameter: Upd Xsum OnPath: Configuration Manager > Protocols > IP > InterfacesDefault: Enable

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-36308628-14.00 Rev 00Parameter: TR EndstationPath: Configuration Manager > Protocols >

Site Manager Parameters308628-14.00 Rev 00A-37 Parameter: Ethernet Arp EncapsPath: Configuration Manager > Protocols > IP > InterfacesDefault

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-38308628-14.00 Rev 00Parameter: SMDS Arp Request AddressPath: Configuration Manager > Prot

Site Manager Parameters308628-14.00 Rev 00A-39 Parameter: FRM Cast 1 DLCIPath: Configuration Manager > Protocols > IP > InterfacesDefault: 0O

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-40308628-14.00 Rev 00Parameter: Slot MaskPath: Configuration Manager > Protocols > IP &

Site Manager Parameters308628-14.00 Rev 00A-41 Parameter: Forward Cache SizePath: Configuration Manager > Protocols > IP > InterfacesDefault:

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-42308628-14.00 Rev 00Parameter: Unnumbered Associated AlternatePath: Configuration Manager &g

Site Manager Parameters308628-14.00 Rev 00A-43 Parameter: ARP Server ATM Address User PartPath: Configuration Manager > Protocols > IP > Inte

Configuring IP Exterior Gateway Protocols (BGP and EGP)1-2308628-14.00 Rev 00Figure 1-1. An Internet Connecting Three Autonomous SystemsThe routers at

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-44308628-14.00 Rev 00IP Global ParametersParameter: EnablePath: Configuration Manager > Pr

Site Manager Parameters308628-14.00 Rev 00A-45 Parameter: ARP ForwardingPath: Configuration Manager > Protocols > IP > GlobalDefault: Forward

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-46308628-14.00 Rev 00Parameter: Nonlocal ARP DestinationPath: Configuration Manager > Prot

Site Manager Parameters308628-14.00 Rev 00A-47 Parameter: Zero Subnet EnablePath: Configuration Manager > Protocols > IP > GlobalDefault: Dis

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-48308628-14.00 Rev 00Parameter: Estimated HostsPath: Configuration Manager > Protocols >

Site Manager Parameters308628-14.00 Rev 00A-49 Parameter: Maximum Policy RulesPath: Configuration Manager > Protocols > IP > GlobalDefault: 3

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-50308628-14.00 Rev 00Parameter: Enable ISP Mode SupportPath: Configuration Manager > Proto

Site Manager Parameters308628-14.00 Rev 00A-51 Static Route ParametersParameter: EnablePath: Configuration Manager > Protocols > IP > Static

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-52308628-14.00 Rev 00Parameter: Address MaskPath: Configuration Manager > Protocols > I

Site Manager Parameters308628-14.00 Rev 00A-53 Parameter: Next Hop MaskPath: Configuration Manager > Protocols > IP > Static RoutesDefault: 0

Exterior Gateway Protocols (BGP/EGP)308628-14.00 Rev 001-3 Border Gateway Protocol (BGP)The Border Gateway Protocol (BGP) is an exterior gateway proto

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-54308628-14.00 Rev 00Adjacent Host ParametersParameter: EnablePath: Configuration Manager >

Site Manager Parameters308628-14.00 Rev 00A-55 Parameter: MAC AddressPath: Configuration Manager > Protocols > IP > Adjacent HostsDefault: No

Configuring IP Exterior Gateway Protocols (BGP and EGP)A-56308628-14.00 Rev 00Parameter: Adjacent Host X.121 AddressPath: Configuration Manager > P

Site Manager Parameters308628-14.00 Rev 00A-57 Parameter: Adjacent Host TypePath: Configuration Manager > Protocols > IP > Adjacent HostsDefa

308628-14.00 Rev 00B-1 Appendix BRouting PoliciesTopic PageAccept PoliciesCommon Accept Policy ParametersB-2EGP-Specific Accept Policy Parameters B-7B

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-2308628-14.00 Rev 00Common Accept Policy ParametersParameter: EnablePath: Configuration Manag

Routing Policies308628-14.00 Rev 00B-3 Parameter: NamePath: Configuration Manager > Protocols > IP > Policy Filters > EGP > Accept Poli

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-4308628-14.00 Rev 00Parameter: NetworksPath: Configuration Manager > Protocols > IP >

Routing Policies308628-14.00 Rev 00B-5 Parameter: ActionPath: Configuration Manager > Protocols > IP > Policy Filters > EGP > Accept Po

Configuring IP Exterior Gateway Protocols (BGP and EGP)1-4308628-14.00 Rev 00Classless Interdomain RoutingClassless interdomain routing (CIDR) is an a

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-6308628-14.00 Rev 00Parameter: Route PreferencePath: Configuration Manager > Protocols >

Routing Policies308628-14.00 Rev 00B-7 EGP-Specific Accept Policy ParametersParameter: Rule PrecedencePath: Configuration Manager > Protocols >

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-8308628-14.00 Rev 00Parameter: AS ListPath: Configuration Manager > Protocols > IP >

Routing Policies308628-14.00 Rev 00B-9 BGP-3-Specific Accept Policy Parameters Parameter: Injection ListPath: Configuration Manager > Protocols >

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-10308628-14.00 Rev 00Parameter: Peer ASPath: Configuration Manager > Protocols > IP >

Routing Policies308628-14.00 Rev 00B-11 Parameter: Route OriginPath: Configuration Manager > Protocols > IP > Policy Filters > BGP-3 >

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-12308628-14.00 Rev 00Parameter: BGP Communities to matchPath: Configuration Manager > Prot

Routing Policies308628-14.00 Rev 00B-13 BGP-4-Specific Accept Policy ParametersParameter: Injection ListPath: Configuration Manager > Protocols >

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-14308628-14.00 Rev 00Parameter: Peer ASPath: Configuration Manager > Protocols > IP >

Routing Policies308628-14.00 Rev 00B-15 Parameter: Route OriginPath: Configuration Manager > Protocols > IP > Policy Filters > BGP-4 >

Exterior Gateway Protocols (BGP/EGP)308628-14.00 Rev 001-5 Nortel Networks supports BGP-3 and BGP-4:• BGP-3 assumes that each advertised network is a

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-16308628-14.00 Rev 00Parameter: Local PreferencePath: Configuration Manager > Protocols &g

Routing Policies308628-14.00 Rev 00B-17 Parameter: AS PatternPath: Configuration Manager > Protocols > IP > Policy Filters > BGP-4 > Ac

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-18308628-14.00 Rev 00Parameter: BGP Community to acceptPath: Configuration Manager > Proto

Routing Policies308628-14.00 Rev 00B-19 Parameter: Route Flap Dampening TemplatePath: Configuration Manager > Protocols > IP > Policy Filters

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-20308628-14.00 Rev 00Parameter: Multi-Exit Discriminator ValuePath: Configuration Manager >

Routing Policies308628-14.00 Rev 00B-21 Parameter: Reuse ThresholdPath: Configuration Manager > Protocols > IP > Policy Filters > BGP-4 &g

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-22308628-14.00 Rev 00Parameter: Unreachable DecayPath: Configuration Manager > Protocols &

Routing Policies308628-14.00 Rev 00B-23 Parameter: Memory LimitPath: Configuration Manager > Protocols > IP > Policy Filters > BGP-4 >

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-24308628-14.00 Rev 00Common Announce Policy ParametersParameter: EnablePath: Configuration Ma

Routing Policies308628-14.00 Rev 00B-25 Parameter: NamePath: Configuration Manager > Protocols > IP > Policy Filters > EGP > Announce P

Configuring IP Exterior Gateway Protocols (BGP and EGP)1-6308628-14.00 Rev 00Stub and Multihomed Autonomous SystemsAn autonomous system can include on

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-26308628-14.00 Rev 00Parameter: NetworksPath: Configuration Manager > Protocols > IP &g

Routing Policies308628-14.00 Rev 00B-27 Parameter: ActionPath: Configuration Manager > Protocols > IP > Policy Filters > EGP > Announce

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-28308628-14.00 Rev 00Parameter: Rule PrecedencePath: Configuration Manager > Protocols >

Routing Policies308628-14.00 Rev 00B-29 Parameter: Route SourcePath: Configuration Manager > Protocols > IP > Policy Filters > EGP > An

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-30308628-14.00 Rev 00Parameter: AdvertisePath: Configuration Manager > Protocols > IP &

Routing Policies308628-14.00 Rev 00B-31 Parameter: From RIP GatewayPath: Configuration Manager > Protocols > IP > Policy Filters > EGP >

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-32308628-14.00 Rev 00Parameter: Received on RIP InterfacePath: Configuration Manager > Pro

Routing Policies308628-14.00 Rev 00B-33 Parameter: From OSPF Router IDPath: Configuration Manager > Protocols > IP > Policy Filters > EGP

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-34308628-14.00 Rev 00Parameter: Received OSPF TypePath: Configuration Manager > Protocols

Routing Policies308628-14.00 Rev 00B-35 Parameter: Received OSPF TagPath: Configuration Manager > Protocols > IP > Policy Filters > EGP &g

Exterior Gateway Protocols (BGP/EGP)308628-14.00 Rev 001-7 Figure 1-3. Transit ASIn Figure 1-3, AS 20 is the transit AS. It provides information about

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-36308628-14.00 Rev 00Parameter: From EGP PeerPath: Configuration Manager > Protocols >

Routing Policies308628-14.00 Rev 00B-37 Parameter: From EGP ASPath: Configuration Manager > Protocols > IP > Policy Filters > EGP > Ann

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-38308628-14.00 Rev 00Parameter: Received EGP GatewayPath: Configuration Manager > Protocol

Routing Policies308628-14.00 Rev 00B-39 Parameter: From BGP PeerPath: Configuration Manager > Protocols > IP > Policy Filters > EGP > A

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-40308628-14.00 Rev 00Parameter: From BGP ASPath: Configuration Manager > Protocols > IP

Routing Policies308628-14.00 Rev 00B-41 EGP-Specific Announce Policy ParametersParameter: Received BGP Next HopPath: Configuration Manager > Protoc

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-42308628-14.00 Rev 00Parameter: EGP Peer ListPath: Configuration Manager > Protocols >

Routing Policies308628-14.00 Rev 00B-43 BGP-3-Specific Announce Policy ParametersParameter: External Route SourcePath: Configuration Manager > Prot

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-44308628-14.00 Rev 00Parameter: Outbound PeersPath: Configuration Manager > Protocols >

Routing Policies308628-14.00 Rev 00B-45 Parameter: Specific Inter-AS MetricPath: Configuration Manager > Protocols > IP > Policy Filters >

Configuring IP Exterior Gateway Protocols (BGP and EGP)1-8308628-14.00 Rev 00To avoid the high costs of a full-mesh topology to support IBGP speakers

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-46308628-14.00 Rev 00Parameter: Next HopPath: Configuration Manager > Protocols > IP &g

Routing Policies308628-14.00 Rev 00B-47 BGP-4-Specific Announce Policy ParametersParameter: External Route SourcePath: Configuration Manager > Prot

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-48308628-14.00 Rev 00Parameter: Outbound PeersPath: Configuration Manager > Protocols >

Routing Policies308628-14.00 Rev 00B-49 Parameter: Multi-Exit Discriminator ValuePath: Configuration Manager > Protocols > IP > Policy Filter

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-50308628-14.00 Rev 00Parameter: Replace As PathPath: Configuration Manager > Protocols >

Routing Policies308628-14.00 Rev 00B-51 Parameter: Local Preference ValuePath: Configuration Manager > Protocols > IP > Policy Filters > B

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-52308628-14.00 Rev 00Parameter: As PatternPath: Configuration Manager > Protocols > IP

Routing Policies308628-14.00 Rev 00B-53 Parameter: BGP Community attribute actionPath: Configuration Manager > Protocols > IP > Policy Filter

Configuring IP Exterior Gateway Protocols (BGP and EGP)B-54308628-14.00 Rev 00Parameter: As PrependPath: Configuration Manager > Protocols > IP

308628-14.00 Rev 00C-1 Appendix CTranslating Cisco to Nortel Networks EquivalentsThis appendix shows you how to translate Cisco commands and functions

Exterior Gateway Protocols (BGP/EGP)308628-14.00 Rev 001-9 Path AttributesA BGP-3 update message contains a variable-length sequence of path attribute

Configuring IP Exterior Gateway Protocols (BGP and EGP)C-2308628-14.00 Rev 00Table C-1. Cisco to Nortel Networks BGP TranslationItem Cisco Configurati

Translating Cisco to Nortel Networks Equivalents308628-14.00 Rev 00C-3 Item Cisco Configuration Text BCC Command Site Manager Logical Steps6 neighbo

Configuring IP Exterior Gateway Protocols (BGP and EGP)C-4308628-14.00 Rev 00Item Cisco Configuration Text BCC Command Site Manager Logical Steps9 n

Translating Cisco to Nortel Networks Equivalents308628-14.00 Rev 00C-5 Item Cisco Configuration Text BCC Command Site Manager Logical Steps12 aggreg

Configuring IP Exterior Gateway Protocols (BGP and EGP)C-6308628-14.00 Rev 00Interpreting the Cisco to Nortel Networks BGP Translation TableThe number

Translating Cisco to Nortel Networks Equivalents308628-14.00 Rev 00C-7 8.Accept incoming advertisements from peer 1.1.1.1, of AS-Path that contain eit

Configuring IP Exterior Gateway Protocols (BGP and EGP)C-8308628-14.00 Rev 0019.Enables MD5 authentication on the TCP connection between the two BGP p

Translating Cisco to Nortel Networks Equivalents308628-14.00 Rev 00C-9 Interpreting the Cisco and Nortel Networks BGP Operational TableThe following l

Configuring IP Exterior Gateway Protocols (BGP and EGP)C-10308628-14.00 Rev 0017.Discover the routes the router’s packets take when traveling to desti

Translating Cisco to Nortel Networks Equivalents308628-14.00 Rev 00C-11 Comparing BGP Route Selection ProcessesTable C-3 compares the Cisco and Nortel

308628-14.00 Rev 00iii1. License Grant. Nortel Networks NA Inc. (“Nortel Networks”) grants the end user of the Software (“Licensee”) a personal, nonex

Configuring IP Exterior Gateway Protocols (BGP and EGP)1-10308628-14.00 Rev 00BGP/OSPF InteractionRFC 1403 defines the interaction between BGP and OSP

Configuring IP Exterior Gateway Protocols (BGP and EGP)C-12308628-14.00 Rev 00Regular Expression SymbolsTable C-4 lists the characters used in Cisco a

Translating Cisco to Nortel Networks Equivalents308628-14.00 Rev 00C-13 Nortel Networks AS_Path Pattern Matching SymbolsTable C-5 summarizes the symbo

308628-14.00 Rev 00Index-1Aacquisition mode for EGP neighbors, 10-12Acquisition Mode parameter, 10-12, A-26acronyms, xviiiAddr Mask Reply parameter, A

Index-2308628-14.00 Rev 00BGP Dynamic Policy Change Support parameter, 5-13, A-6BGP Enable parameter, 5-3, A-2BGP From Protocols parameter, 5-8, A-4BG

308628-14.00 Rev 00Index-3Enable (weights) parameter, A-22Enable Default Route for Subnets parameter, A-48Enable ISP Mode Support parameter, 4-8, A-50

Index-4308628-14.00 Rev 00Kkeepalive command, BGP peer, 6-8Keepalive Timer parameter, 6-8, A-14LLocal Address parameterBGP peer, 3-2, A-11in multiple

308628-14.00 Rev 00Index-5in route-reflector cluster configuration, 8-6in RR client configuration, 8-11in single route-reflector configuration, 8-4pee

Index-6308628-14.00 Rev 00RRedirect parameter, A-36redundant-connection command, 5-10Registration Refresh Interval parameter, A-43Remote Autonomous Sy

Exterior Gateway Protocols (BGP/EGP)308628-14.00 Rev 001-11 • Lets you configure a confederation ID on the router• Implements new AS_PATH segment type

Configuring IP Exterior Gateway Protocols (BGP and EGP)1-12308628-14.00 Rev 00If OSPF is the IGP, you should also use the default OSPF tag constructio

308628-14.00 Rev 002-1 Chapter 2Starting BGP Services with the BCCThis chapter describes how to use the BCC to start the following services with a bas

Configuring IP Exterior Gateway Protocols (BGP and EGP)2-2308628-14.00 Rev 00For example, the following command configures an Ethernet interface on sl

Starting BGP Services with the BCC308628-14.00 Rev 002-3 Starting BGPTo start BGP:1. Configure BGP on the router.2. Define a BGP peer-to-peer connecti

308628-14.00 Rev 003-1 Chapter 3Starting BGP and EGP Services with Site ManagerThis chapter describes how to use Site Manager to start the following I

Configuring IP Exterior Gateway Protocols (BGP and EGP)3-2308628-14.00 Rev 00When you have successfully configured the circuit, the Select Protocols w

Starting BGP and EGP Services with Site Manager308628-14.00 Rev 003-3 Deleting BGP from the RouterYou can delete BGP from all router circuits on which

iv308628-14.00 Rev 005. Government Licensees. This provision applies to all Software and documentation acquired directly or indirectly by or on behal

Configuring IP Exterior Gateway Protocols (BGP and EGP)3-4308628-14.00 Rev 00To delete BGP-4, complete the following steps:Starting EGPBefore you can

Starting BGP and EGP Services with Site Manager308628-14.00 Rev 003-5 When you have successfully configured the circuit, the Select Protocols window o

Configuring IP Exterior Gateway Protocols (BGP and EGP)3-6308628-14.00 Rev 00Deleting EGP from the RouterYou can delete EGP from all router circuits o

Starting BGP and EGP Services with Site Manager308628-14.00 Rev 003-7 • You can add BGP to a circuitless interface.• You must assign a unique IP addre

Configuring IP Exterior Gateway Protocols (BGP and EGP)3-8308628-14.00 Rev 00The routing-table entry for a route learned over an unnumbered interface

308628-14.00 Rev 004-1 Chapter 4Configuring and Customizing IP for BGPYou customize IP services for BGP by setting the BGP-related IP parameters.Custo

Configuring IP Exterior Gateway Protocols (BGP and EGP)4-2308628-14.00 Rev 00Navigating the BCC to the IP Global PromptBeginning at the top-level box

Configuring and Customizing IP for BGP308628-14.00 Rev 004-3 Opening the Site Manager Window for IP Global ParametersUse the following Site Manager pr

Configuring IP Exterior Gateway Protocols (BGP and EGP)4-4308628-14.00 Rev 00Using Site ManagerConfiguring the Router for Forwarding ModeBy default, I

Configuring and Customizing IP for BGP308628-14.00 Rev 004-5 For example, the following command puts the router in forwarding mode:ip# forwarding forw

308628-14.00 Rev 00 vContents PrefaceBefore You Begin ...

Configuring IP Exterior Gateway Protocols (BGP and EGP)4-6308628-14.00 Rev 00• Destination-hash distribution based on the destination address only. IP

Configuring and Customizing IP for BGP308628-14.00 Rev 004-7 Using Site ManagerEnabling ISP Mode on the RouterIP provides an Internet service provider

Configuring IP Exterior Gateway Protocols (BGP and EGP)4-8308628-14.00 Rev 00The following parameter settings also help to optimize router performance

Configuring and Customizing IP for BGP308628-14.00 Rev 004-9 Defining a Static RouteA static route is a manually configured route that specifies the t

Configuring IP Exterior Gateway Protocols (BGP and EGP)4-10308628-14.00 Rev 00Using the BCCNavigate to the global IP prompt and enter:static-route add

Configuring and Customizing IP for BGP308628-14.00 Rev 004-11 Table 4-1. BCC Static Route ParametersParameter Values/Defaults Meaning/Instructionsstat

Configuring IP Exterior Gateway Protocols (BGP and EGP)4-12308628-14.00 Rev 00For example, the following command line configures a static route to des

Configuring and Customizing IP for BGP308628-14.00 Rev 004-13 Using Site ManagerDefining a Static Default RouteIf IP receives a data packet with a des

Configuring IP Exterior Gateway Protocols (BGP and EGP)4-14308628-14.00 Rev 00Defining a Static Black Hole for a SupernetA router that advertises an a

308628-14.00 Rev 005-1 Chapter 5Configuring and Customizing BGPConfiguring BGP GloballyYou configure and customize the Border Gateway Protocol (BGP) p

vi 308628-14.00 Rev 00Chapter 2 Starting BGP Services with the BCCStarting IP ...

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-2308628-14.00 Rev 00Enabling and Disabling BGPWhen you start BGP on the router, BGP is automa

Configuring and Customizing BGP308628-14.00 Rev 005-3 Using Site ManagerSite Manager ProcedureYou do this System responds1. In the Configuration Manag

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-4308628-14.00 Rev 00Supplying a BGP IdentifierThe BGP identifier is the IP address of an inte

Configuring and Customizing BGP308628-14.00 Rev 005-5 Identifying the Local ASEach autonomous system in the internet has a unique AS ID.You can use th

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-6308628-14.00 Rev 00Disabling and Reenabling IBGP SupportBy default, BGP supports IBGP intra-

Configuring and Customizing BGP308628-14.00 Rev 005-7 Specifying Route Types for IBGP AdvertisementsIf IBGP is enabled, you can specify the types of r

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-8308628-14.00 Rev 00Using Site ManagerSite Manager ProcedureYou do this System responds1. In

Configuring and Customizing BGP308628-14.00 Rev 005-9 Setting the Update Interval TimerBGP injects external BGP routes into the routing table. The def

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-10308628-14.00 Rev 00Allowing Redundant Connections By default, BGP performs redundancy check

Configuring and Customizing BGP308628-14.00 Rev 005-11 The following command sequence reenables redundancy checking and configures BGP to allow up to

308628-14.00 Rev 00 viiChapter 5 Configuring and Customizing BGPConfiguring BGP Globally ...

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-12308628-14.00 Rev 00Using the BCCNavigate to the BGP prompt and enter:multi-hop <state>

Configuring and Customizing BGP308628-14.00 Rev 005-13 Disabling and Reenabling Dynamic Policy ConfigurationBy default, BGP reconfigures IP policies d

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-14308628-14.00 Rev 00Configuring BGP as a SoloistBy default, BGP runs as a soloist on a slot

Configuring and Customizing BGP308628-14.00 Rev 005-15 Using Site ManagerAssociating a Route Reflector with a Cluster IDIn an AS with multiple cluster

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-16308628-14.00 Rev 00Using the BCCNavigate to the BGP prompt and enter:subnet-aggregation <

Configuring and Customizing BGP308628-14.00 Rev 005-17 Configuring BGP-4 ConfederationsIf this router is a member of an autonomous system that is part

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-18308628-14.00 Rev 00Using Site ManagerEnabling and Disabling Black Hole PunchingIf BGP adver

Configuring and Customizing BGP308628-14.00 Rev 005-19 Using the BCCNavigate to the BGP prompt and enter:black-hole-punching <action>action is o

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-20308628-14.00 Rev 00Using Site ManagerDisabling and Reenabling the BGP-4 MED AttributeBy def

Configuring and Customizing BGP308628-14.00 Rev 005-21 Using Site ManagerConfiguring and Enabling MD5 AuthenticationBGP-4 TCP MD5 authentication lets

viii 308628-14.00 Rev 00Chapter 6 Establishing a Peer-to-Peer SessionDefining a Peer-to-Peer Session ...

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-22308628-14.00 Rev 00When BGP-4 TCP MD5 authentication is enabled, a router computes an MD5 s

Configuring and Customizing BGP308628-14.00 Rev 005-23 Configuring BGP AuthenticationYou can configure BGP MD5 authentication using the BCC or Site Ma

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-24308628-14.00 Rev 00Verifying MD5 Signatures on Received BGP TCP PacketsWhen TCP receives a

Configuring and Customizing BGP308628-14.00 Rev 005-25 Using the BCCTo set the BGP-4 authentication parameters, navigate to the peer prompt and enter:

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-26308628-14.00 Rev 00Using Site ManagerDisabling BayRS Local Preference Calculation and Route

Configuring and Customizing BGP308628-14.00 Rev 005-27 If you are configuring BGP in a network that also includes routers from vendors other than Nort

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-28308628-14.00 Rev 00Best-Route SelectionBGP uses the rules in Table 5-4 as tie breakers to s

Configuring and Customizing BGP308628-14.00 Rev 005-29 For example, the following command disables BayRS BGP local-preference calculation and route se

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-30308628-14.00 Rev 00Configuring BGP Message LoggingSite Manager allows you to control the ev

Configuring and Customizing BGP308628-14.00 Rev 005-31 Configuring EBGP Route Flap DampeningThe frequent change of network reachability information th

308628-14.00 Rev 00 ixChapter 9 Configuring Route and Traffic-Load BalancingConfiguring IBGP for Route and Traffic-Load Balancing ...

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-32308628-14.00 Rev 00• Maximum holddown time. If the route remains suppressed after the numbe

Configuring and Customizing BGP308628-14.00 Rev 005-33 To apply the template to an inbound BGP routing update:1.Create and name a BGP accept policy.Fo

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-34308628-14.00 Rev 003.Match the accept policy to the unstable route.For instructions, see “S

Configuring and Customizing BGP308628-14.00 Rev 005-35 Using Site ManagerTo create a route-flap-dampening template, complete the following tasks:Site

Configuring IP Exterior Gateway Protocols (BGP and EGP)5-36308628-14.00 Rev 00To apply a route-flap-dampening template to an existing BGP accept polic

308628-14.00 Rev 006-1 Chapter 6Establishing a Peer-to-Peer SessionA BGP speaker forms a neighbor relationship by establishing a TCP connection to ano

Configuring IP Exterior Gateway Protocols (BGP and EGP)6-2308628-14.00 Rev 00Defining a Peer-to-Peer SessionTo define a peer-to-peer session, you spec

Establishing a Peer-to-Peer Session308628-14.00 Rev 006-3 Using Site ManagerSite Manager ProcedureYou do this System responds1. In the Configuration M

Configuring IP Exterior Gateway Protocols (BGP and EGP)6-4308628-14.00 Rev 00Initiating a Peer-to-Peer SessionA BGP speaker initiates a peer-to-peer c

Establishing a Peer-to-Peer Session308628-14.00 Rev 006-5 Using the BCCNavigate to a BGP peer prompt and enter:retry <interval>interval is the n