Administrator Guide

Congure Route Map Filters.........................................................................................................................................129
Conguring Match Routes............................................................................................................................................ 129
Conguring Set Conditions........................................................................................................................................... 130
Congure a Route Map for Route Redistribution........................................................................................................131
Congure a Route Map for Route Tagging.................................................................................................................. 131
Continue Clause..............................................................................................................................................................132
Logging of ACL Processes............................................................................................................................................ 132
Guidelines for Conguring ACL Logging......................................................................................................................133
Conguring ACL Logging...............................................................................................................................................133
Flow-Based Monitoring Support for ACLs.................................................................................................................. 134
Behavior of Flow-Based Monitoring.......................................................................................................................134
Enabling Flow-Based Monitoring..................................................................................................................................135
9 Bidirectional Forwarding Detection (BFD).................................................................................................. 137
How BFD Works..............................................................................................................................................................137
BFD Packet Format..................................................................................................................................................138
BFD Sessions............................................................................................................................................................ 139
BFD Three-Way Handshake.................................................................................................................................... 140
Session State Changes............................................................................................................................................142
Important Points to Remember.................................................................................................................................... 142
Congure BFD................................................................................................................................................................ 142
Congure BFD for Physical Ports...........................................................................................................................143
Enabling BFD Globally.............................................................................................................................................. 143
Changing Physical Port Session Parameters........................................................................................................ 144
Disabling and Re-Enabling BFD...............................................................................................................................144
Congure BFD for Static Routes..................................................................................................................................145
Related Conguration Tasks....................................................................................................................................145
Establishing Sessions for Static Routes.................................................................................................................145
Establishing Static Route Sessions on Specic Neighbors................................................................................. 146
Changing Static Route Session Parameters..........................................................................................................147
Disabling BFD for Static Routes..............................................................................................................................147
Congure BFD for OSPF............................................................................................................................................... 147
Related Conguration Tasks....................................................................................................................................148
Establishing Sessions with OSPF Neighbors........................................................................................................ 148
Changing OSPF Session Parameters.....................................................................................................................149
Disabling BFD for OSPF...........................................................................................................................................149
Congure BFD for OSPFv3...........................................................................................................................................150
Related Conguration Tasks....................................................................................................................................150
Establishing Sessions with OSPFv3 Neighbors....................................................................................................150
Changing OSPFv3 Session Parameters................................................................................................................ 150
Disabling BFD for OSPFv3....................................................................................................................................... 151
Congure BFD for BGP..................................................................................................................................................151
Prerequisites...............................................................................................................................................................151
Establishing Sessions with BGP Neighbors........................................................................................................... 151
Disabling BFD for BGP.............................................................................................................................................153
Use BFD in a BGP Peer Group............................................................................................................................... 154
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