Conguring a Standard IP ACL Filter............................................................................................................................115
Congure an Extended IP ACL......................................................................................................................................116
Conguring Filters with a Sequence Number..............................................................................................................116
Conguring Filters Without a Sequence Number....................................................................................................... 116
Established Flag...............................................................................................................................................................117
Congure Layer 2 and Layer 3 ACLs.............................................................................................................................117
Assign an IP ACL to an Interface...................................................................................................................................118
Applying an IP ACL..........................................................................................................................................................118
Counting ACL Hits.......................................................................................................................................................... 119
Congure Ingress ACLs.................................................................................................................................................. 119
Congure Egress ACLs...................................................................................................................................................119
Applying Egress Layer 3 ACLs (Control-Plane).......................................................................................................... 120
IP Prex Lists.................................................................................................................................................................. 120
Implementation Information..................................................................................................................................... 121
Conguration Task List for Prex Lists.........................................................................................................................121
Creating a Prex List.......................................................................................................................................................121
Creating a Prex List Without a Sequence Number.................................................................................................. 122
Viewing Prex Lists........................................................................................................................................................ 123
Applying a Prex List for Route Redistribution........................................................................................................... 123
Applying a Filter to a Prex List (OSPF)......................................................................................................................124
ACL Remarks.................................................................................................................................................................. 124
Conguring a Remark.............................................................................................................................................. 125
Deleting a Remark.................................................................................................................................................... 125
ACL Resequencing......................................................................................................................................................... 126
Resequencing an ACL or Prex List.............................................................................................................................126
Route Maps.....................................................................................................................................................................128
Implementation Information.................................................................................................................................... 128
Important Points to Remember.................................................................................................................................... 128
Conguration Task List for Route Maps...................................................................................................................... 128
Creating a Route Map....................................................................................................................................................128
Congure Route Map Filters.........................................................................................................................................130
Conguring Match Routes............................................................................................................................................130
Conguring Set Conditions............................................................................................................................................131
Congure a Route Map for Route Redistribution.......................................................................................................132
Congure a Route Map for Route Tagging..................................................................................................................132
Continue Clause..............................................................................................................................................................133
Logging of ACL Processes............................................................................................................................................ 133
Guidelines for Conguring ACL Logging......................................................................................................................134
Conguring ACL Logging...............................................................................................................................................134
Flow-Based Monitoring Support for ACLs..................................................................................................................135
Behavior of Flow-Based Monitoring.......................................................................................................................135
Enabling Flow-Based Monitoring..................................................................................................................................136
8 Bidirectional Forwarding Detection (BFD).................................................................................................. 138
How BFD Works............................................................................................................................................................. 138
BFD Packet Format..................................................................................................................................................139
6
Contents