Congure ACL Range Proles....................................................................................................................................... 112
Important Points to Remember..................................................................................................................................... 113
Conguration Task List for Route Maps.................................................................................................................113
Conguring Match Routes.......................................................................................................................................116
Conguring Set Conditions...................................................................................................................................... 117
Congure a Route Map for Route Redistribution..................................................................................................118
Congure a Route Map for Route Tagging............................................................................................................ 118
Continue Clause........................................................................................................................................................ 119
IP Fragment Handling..................................................................................................................................................... 119
IP Fragments ACL Examples................................................................................................................................... 119
Layer 4 ACL Rules Examples...................................................................................................................................120
Congure a Standard IP ACL.........................................................................................................................................121
Conguring a Standard IP ACL Filter..................................................................................................................... 122
Congure an Extended IP ACL..................................................................................................................................... 122
Conguring Filters with a Sequence Number....................................................................................................... 123
Conguring Filters Without a Sequence Number.................................................................................................125
Congure Layer 2 and Layer 3 ACLs............................................................................................................................126
Assign an IP ACL to an Interface.................................................................................................................................. 127
Applying an IP ACL......................................................................................................................................................... 127
Counting ACL Hits....................................................................................................................................................128
Congure Ingress ACLs................................................................................................................................................. 128
Congure Egress ACLs.................................................................................................................................................. 128
Applying Egress Layer 3 ACLs (Control-Plane).................................................................................................... 129
Conguring UDF ACL.................................................................................................................................................... 130
IP Prex Lists.................................................................................................................................................................. 132
Implementation Information.................................................................................................................................... 133
Conguration Task List for Prex Lists.................................................................................................................. 133
ACL Remarks.................................................................................................................................................................. 136
Conguring a Remark.............................................................................................................................................. 136
Deleting a Remark.....................................................................................................................................................137
ACL Resequencing......................................................................................................................................................... 138
Resequencing an ACL or Prex List.......................................................................................................................138
Route Maps.....................................................................................................................................................................139
Implementation Information.................................................................................................................................... 139
8 Bidirectional Forwarding Detection (BFD)...................................................................................................141
How BFD Works.............................................................................................................................................................. 141
BFD Packet Format..................................................................................................................................................142
BFD Sessions............................................................................................................................................................ 143
BFD Three-Way Handshake.................................................................................................................................... 144
Session State Changes............................................................................................................................................146
Important Points to Remember.................................................................................................................................... 146
Congure BFD.................................................................................................................................................................147
Congure BFD for Physical Ports...........................................................................................................................147
Congure BFD for Static Routes............................................................................................................................149
Congure BFD for IPv6 Static Routes...................................................................................................................152
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