Reference Guide

Configuring Match Routes..........................................................................................................107
Configuring Set Conditions........................................................................................................ 108
Configure a Route Map for Route Redistribution...................................................................... 109
Configure a Route Map for Route Tagging................................................................................ 110
Continue Clause.......................................................................................................................... 110
IP Fragment Handling........................................................................................................................ 111
IP Fragments ACL Examples........................................................................................................ 111
Layer 4 ACL Rules Examples........................................................................................................112
Configure a Standard IP ACL.............................................................................................................113
Configuring a Standard IP ACL Filter...........................................................................................114
Configure an Extended IP ACL..........................................................................................................115
Configuring Filters with a Sequence Number............................................................................ 115
Configuring Filters Without a Sequence Number...................................................................... 116
Configure Layer 2 and Layer 3 ACLs.................................................................................................117
Assign an IP ACL to an Interface.......................................................................................................118
Applying an IP ACL............................................................................................................................ 118
Counting ACL Hits....................................................................................................................... 119
Configure Ingress ACLs.....................................................................................................................119
Configure Egress ACLs..................................................................................................................... 120
Applying Egress Layer 3 ACLs (Control-Plane)...........................................................................121
Configuring UDF ACL........................................................................................................................ 121
IP Prefix Lists......................................................................................................................................124
Implementation Information...................................................................................................... 124
Configuration Task List for Prefix Lists....................................................................................... 124
ACL Resequencing............................................................................................................................ 128
Resequencing an ACL or Prefix List............................................................................................129
Route Maps........................................................................................................................................130
Implementation Information...................................................................................................... 130
Flow-Based Monitoring Support for ACLs........................................................................................131
Behavior of Flow-Based Monitoring........................................................................................... 131
Enabling Flow-Based Monitoring............................................................................................... 132
8 Bidirectional Forwarding Detection (BFD).................................................. 134
How BFD Works................................................................................................................................ 134
BFD Packet Format......................................................................................................................135
BFD Sessions................................................................................................................................137
BFD Three-Way Handshake........................................................................................................ 137
Session State Changes................................................................................................................ 138
Important Points to Remember........................................................................................................139
Configure BFD...................................................................................................................................139
Configure BFD for Physical Ports............................................................................................... 140
Configure BFD for Static Routes.................................................................................................143
6