Conguring a Standard IP ACL Filter............................................................................................................................113
Congure an Extended IP ACL......................................................................................................................................114
Conguring Filters with a Sequence Number..............................................................................................................114
Conguring Filters Without a Sequence Number....................................................................................................... 115
Established Flag...............................................................................................................................................................115
Congure Layer 2 and Layer 3 ACLs............................................................................................................................ 115
Assign an IP ACL to an Interface...................................................................................................................................116
Applying an IP ACL..........................................................................................................................................................116
Counting ACL Hits...........................................................................................................................................................117
Congure Ingress ACLs.................................................................................................................................................. 117
Congure Egress ACLs...................................................................................................................................................118
Applying Egress Layer 3 ACLs (Control-Plane)...........................................................................................................118
IP Prex Lists...................................................................................................................................................................119
Implementation Information.....................................................................................................................................119
Conguration Task List for Prex Lists.........................................................................................................................119
Creating a Prex List......................................................................................................................................................120
Creating a Prex List Without a Sequence Number..................................................................................................120
Viewing Prex Lists.........................................................................................................................................................121
Applying a Prex List for Route Redistribution...........................................................................................................122
Applying a Filter to a Prex List (OSPF)......................................................................................................................122
ACL Remarks.................................................................................................................................................................. 123
Conguring a Remark.............................................................................................................................................. 123
Deleting a Remark.................................................................................................................................................... 124
ACL Resequencing......................................................................................................................................................... 124
Resequencing an ACL or Prex List.............................................................................................................................125
Route Maps.....................................................................................................................................................................126
Implementation Information.................................................................................................................................... 126
Important Points to Remember.................................................................................................................................... 126
Conguration Task List for Route Maps...................................................................................................................... 126
Creating a Route Map....................................................................................................................................................127
Congure Route Map Filters......................................................................................................................................... 128
Conguring Match Routes............................................................................................................................................ 129
Conguring Set Conditions........................................................................................................................................... 129
Congure a Route Map for Route Redistribution.......................................................................................................130
Congure a Route Map for Route Tagging.................................................................................................................. 131
Continue Clause...............................................................................................................................................................131
Logging of ACL Processes............................................................................................................................................. 131
Guidelines for Conguring ACL Logging......................................................................................................................132
Conguring ACL Logging...............................................................................................................................................133
Flow-Based Monitoring Support for ACLs.................................................................................................................. 133
Behavior of Flow-Based Monitoring.......................................................................................................................133
Enabling Flow-Based Monitoring..................................................................................................................................135
8 Bidirectional Forwarding Detection (BFD)...................................................................................................137
How BFD Works..............................................................................................................................................................137
BFD Packet Format..................................................................................................................................................138
6
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