Administrator Guide

Conguration Task List for Route Maps.................................................................................................................112
Conguring Match Routes.......................................................................................................................................114
Conguring Set Conditions......................................................................................................................................115
Congure a Route Map for Route Redistribution..................................................................................................116
Congure a Route Map for Route Tagging............................................................................................................ 117
Continue Clause.........................................................................................................................................................117
IP Fragment Handling..................................................................................................................................................... 118
IP Fragments ACL Examples................................................................................................................................... 118
Layer 4 ACL Rules Examples................................................................................................................................... 118
Congure a Standard IP ACL.........................................................................................................................................119
Conguring a Standard IP ACL Filter..................................................................................................................... 120
Congure an Extended IP ACL......................................................................................................................................121
Conguring Filters with a Sequence Number........................................................................................................121
Conguring Filters Without a Sequence Number.................................................................................................122
Congure Layer 2 and Layer 3 ACLs............................................................................................................................123
Assign an IP ACL to an Interface..................................................................................................................................124
Applying an IP ACL.........................................................................................................................................................124
Counting ACL Hits....................................................................................................................................................125
Congure Ingress ACLs................................................................................................................................................. 125
Congure Egress ACLs..................................................................................................................................................125
Applying Egress Layer 3 ACLs (Control-Plane).................................................................................................... 126
IP Prex Lists...................................................................................................................................................................127
Implementation Information.....................................................................................................................................127
Conguration Task List for Prex Lists.................................................................................................................. 127
ACL Resequencing..........................................................................................................................................................131
Resequencing an ACL or Prex List........................................................................................................................131
Route Maps.....................................................................................................................................................................133
Implementation Information.................................................................................................................................... 133
Logging of ACL Processes............................................................................................................................................ 133
Guidelines for Conguring ACL Logging................................................................................................................134
Conguring ACL Logging.........................................................................................................................................134
Flow-Based Monitoring Support for ACLs.................................................................................................................. 135
Behavior of Flow-Based Monitoring.......................................................................................................................135
Enabling Flow-Based Monitoring............................................................................................................................136
8 Bidirectional Forwarding Detection (BFD).................................................................................................. 138
How BFD Works............................................................................................................................................................. 138
BFD Packet Format..................................................................................................................................................139
BFD Sessions............................................................................................................................................................ 140
BFD Three-Way Handshake.....................................................................................................................................141
Session State Changes............................................................................................................................................143
Important Points to Remember.................................................................................................................................... 143
Congure BFD................................................................................................................................................................ 143
Congure BFD for Physical Ports...........................................................................................................................144
Congure BFD for Static Routes............................................................................................................................145
Congure BFD for OSPF.........................................................................................................................................148
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