Reference Guide

Table Of Contents
Configure a Standard IP ACL............................................................................................................ 130
Configuring a Standard IP ACL Filter...........................................................................................131
Configure an Extended IP ACL......................................................................................................... 132
Configuring Filters with a Sequence Number............................................................................ 132
Configuring Filters Without a Sequence Number......................................................................133
Established Flag.................................................................................................................................134
Configure Layer 2 and Layer 3 ACLs................................................................................................ 134
Assign an IP ACL to an Interface.......................................................................................................135
Applying an IP ACL...................................................................................................................... 135
Counting ACL Hits.......................................................................................................................136
Configure Ingress ACLs.....................................................................................................................136
Configure Egress ACLs......................................................................................................................137
Applying Egress Layer 3 ACLs (Control-Plane)...........................................................................137
Configure ACLs to Loopback........................................................................................................... 138
Applying an ACL on Loopback Interfaces........................................................................................138
IP Prefix Lists......................................................................................................................................139
Implementation Information...................................................................................................... 140
Configuration Task List for Prefix Lists....................................................................................... 140
Creating a Prefix List......................................................................................................................... 140
Creating a Prefix List Without a Sequence Number...................................................................141
Viewing Prefix Lists......................................................................................................................142
Applying a Prefix List for Route Redistribution...........................................................................143
Applying a Filter to a Prefix List (OSPF).......................................................................................143
ACL Resequencing............................................................................................................................144
Resequencing an ACL or Prefix List............................................................................................145
Route Maps........................................................................................................................................146
Implementation Information...................................................................................................... 146
Important Points to Remember..................................................................................................146
Configuration Task List for Route Maps..................................................................................... 147
Creating a Route Map..................................................................................................................147
Configure Route Map Filters.......................................................................................................148
Configuring Match Routes..........................................................................................................149
Configuring Set Conditions.........................................................................................................151
Configure a Route Map for Route Redistribution...................................................................... 152
Configure a Route Map for Route Tagging................................................................................ 152
Continue Clause..........................................................................................................................153
9 Bidirectional Forwarding Detection (BFD)...................................................154
How BFD Works................................................................................................................................ 154
BFD Packet Format............................................................................................................................155
BFD Sessions..................................................................................................................................... 156
BFD Three-Way Handshake..............................................................................................................157