Table of Contents
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Configuring Match Routes..............................................................................................157
Configuring Set Conditions............................................................................................ 159
Configure a Route Map for Route Redistribution......................................................160
Configure a Route Map for Route Tagging................................................................ 160
Continue Clause................................................................................................................161
Configuring a UDF ACL......................................................................................................... 161
Hot-Lock Behavior.................................................................................................................163
7 Bidirectional Forwarding Detection (BFD).......................................................................164
How BFD Works......................................................................................................................164
BFD Packet Format...........................................................................................................166
BFD Sessions......................................................................................................................168
BFD Three-Way Handshake........................................................................................... 168
Session State Changes.....................................................................................................170
Important Points to Remember.......................................................................................... 170
Configure BFD......................................................................................................................... 171
Configure BFD for Static Routes.................................................................................... 171
Configure BFD for OSPF..................................................................................................173
Configure BFD for OSPFv3............................................................................................. 176
Configure BFD for IS-IS................................................................................................... 177
Configure BFD for BGP................................................................................................... 180
Configure BFD for VRRP..................................................................................................187
Configuring Protocol Liveness...................................................................................... 190
8 Border Gateway Protocol IPv4 (BGPv4)...........................................................................191
Autonomous Systems (AS).................................................................................................... 191
Sessions and Peers.................................................................................................................194
Establish a Session............................................................................................................194
Route Reflectors..................................................................................................................... 195
Communities..................................................................................................................... 196
BGP Attributes.........................................................................................................................196
Best Path Selection Criteria............................................................................................ 196
Weight.................................................................................................................................198
Local Preference...............................................................................................................199
Multi-Exit Discriminators (MEDs)...................................................................................199
Origin..................................................................................................................................200
AS Path................................................................................................................................201
Next Hop............................................................................................................................ 201
Multiprotocol BGP................................................................................................................. 202
Implement BGP ..................................................................................................................... 202
Additional Path (Add-Path) Support............................................................................. 202
Advertise IGP Cost as MED for Redistributed Routes...............................................202
Version 9.10(0.0)
7
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Table of Contents
Troubleshooting
