Users Guide

Allocating CAM for Egress ACLs on the Port Extender...................................................................................... 115
Implementing ACLs ..................................................................................................................................................116
IP Fragment Handling..................................................................................................................................................... 117
IP Fragments ACL Examples................................................................................................................................... 117
Layer 4 ACL Rules Examples................................................................................................................................... 118
Configure a Standard IP ACL........................................................................................................................................ 119
Configuring a Standard IP ACL Filter.....................................................................................................................120
Configure an Extended IP ACL.....................................................................................................................................120
Configuring Filters with a Sequence Number........................................................................................................121
Configuring Filters Without a Sequence Number................................................................................................ 122
Configure Layer 2 and Layer 3 ACLs...........................................................................................................................122
Using ACL VLAN Groups...............................................................................................................................................123
Guidelines for Configuring ACL VLAN Groups..................................................................................................... 123
Configuring an ACL VLAN Group...........................................................................................................................124
Allocating ACL VLAN CAM.....................................................................................................................................125
Applying an IP ACL to an Interface..............................................................................................................................125
Applying Ingress ACLs on the Port Extender....................................................................................................... 126
Applying Egress ACLs.............................................................................................................................................. 127
Applying Layer 3 Egress ACLs on Control-Plane Traffic.....................................................................................127
Counting ACL Hits....................................................................................................................................................128
IP Prefix Lists..................................................................................................................................................................128
Implementation Information.................................................................................................................................... 128
Configuration Task List for Prefix Lists................................................................................................................. 129
ACL Resequencing.........................................................................................................................................................132
Resequencing an ACL or Prefix List...................................................................................................................... 133
Route Maps.....................................................................................................................................................................134
Implementation Information.................................................................................................................................... 134
Important Points to Remember....................................................................................................................................134
Configuration Task List for Route Maps............................................................................................................... 134
Configuring Match Routes...................................................................................................................................... 137
Configuring Set Conditions..................................................................................................................................... 138
Configure a Route Map for Route Redistribution................................................................................................ 139
Configure a Route Map for Route Tagging.......................................................................................................... 139
Continue Clause........................................................................................................................................................140
Configuring a UDF ACL................................................................................................................................................. 140
Hot-Lock Behavior......................................................................................................................................................... 142
7 Bidirectional Forwarding Detection (BFD)..................................................................................................143
How BFD Works.............................................................................................................................................................143
BFD Packet Format................................................................................................................................................. 144
BFD Sessions............................................................................................................................................................ 145
BFD Three-Way Handshake................................................................................................................................... 146
Session State Changes............................................................................................................................................148
Important Points to Remember....................................................................................................................................148
Configure BFD................................................................................................................................................................ 148
Configure BFD for Physical Ports.......................................................................................................................... 149
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