Reference Guide
Configuring a Standard IP ACL Filter..........................................................................................130
Configure an Extended IP ACL..........................................................................................................131
Configuring Filters with a Sequence Number............................................................................ 132
Configuring Filters Without a Sequence Number......................................................................132
Established Flag................................................................................................................................. 133
Configure Layer 2 and Layer 3 ACLs................................................................................................ 133
Assign an IP ACL to an Interface.......................................................................................................134
Applying an IP ACL...................................................................................................................... 134
Counting ACL Hits.......................................................................................................................135
Configure Ingress ACLs.....................................................................................................................135
Configure Egress ACLs......................................................................................................................136
Applying Egress Layer 3 ACLs (Control-Plane)...........................................................................137
Configure ACLs to Loopback............................................................................................................137
Applying an ACL on Loopback Interfaces........................................................................................138
IP Prefix Lists......................................................................................................................................139
Implementation Information...................................................................................................... 139
Configuration Task List for Prefix Lists....................................................................................... 139
Creating a Prefix List......................................................................................................................... 140
Creating a Prefix List Without a Sequence Number...................................................................141
Viewing Prefix Lists...................................................................................................................... 141
Applying a Prefix List for Route Redistribution...........................................................................142
Applying a Filter to a Prefix List (OSPF).......................................................................................143
ACL Resequencing............................................................................................................................ 143
Resequencing an ACL or Prefix List............................................................................................144
Route Maps........................................................................................................................................145
Implementation Information...................................................................................................... 146
Important Points to Remember..................................................................................................146
Configuration Task List for Route Maps.....................................................................................146
Creating a Route Map................................................................................................................. 146
Configure Route Map Filters.......................................................................................................148
Configuring Match Routes..........................................................................................................149
Configuring Set Conditions........................................................................................................ 150
Configure a Route Map for Route Redistribution.......................................................................151
Configure a Route Map for Route Tagging................................................................................ 152
Continue Clause..........................................................................................................................152
9 Bidirectional Forwarding Detection (BFD)...................................................153
How BFD Works................................................................................................................................ 153
BFD Packet Format............................................................................................................................154
BFD Sessions......................................................................................................................................155
BFD Three-Way Handshake..............................................................................................................156
Session State Changes...................................................................................................................... 157