Concept Guide

Important Points to Remember.....................................................................................................................................119
Conguration Task List for Route Maps.................................................................................................................119
Conguring Match Routes.......................................................................................................................................121
Conguring Set Conditions..................................................................................................................................... 123
Congure a Route Map for Route Redistribution.................................................................................................124
Congure a Route Map for Route Tagging............................................................................................................124
Continue Clause........................................................................................................................................................125
IP Fragment Handling.................................................................................................................................................... 125
IP Fragments ACL Examples...................................................................................................................................125
Layer 4 ACL Rules Examples...................................................................................................................................126
Congure a Standard IP ACL........................................................................................................................................ 126
Conguring a Standard IP ACL Filter..................................................................................................................... 127
Congure an Extended IP ACL..................................................................................................................................... 128
Conguring Filters with a Sequence Number....................................................................................................... 128
Conguring Filters Without a Sequence Number................................................................................................ 130
Congure Layer 2 and Layer 3 ACLs............................................................................................................................130
Assign an IP ACL to an Interface...................................................................................................................................131
Applying an IP ACL..........................................................................................................................................................131
Counting ACL Hits....................................................................................................................................................132
Congure Ingress ACLs................................................................................................................................................. 132
Congure Egress ACLs.................................................................................................................................................. 133
Applying Egress Layer 3 ACLs (Control-Plane).................................................................................................... 134
IP Prex Lists.................................................................................................................................................................. 134
Implementation Information.................................................................................................................................... 135
Conguration Task List for Prex Lists.................................................................................................................. 135
ACL Remarks.................................................................................................................................................................. 138
Conguring a Remark.............................................................................................................................................. 138
Deleting a Remark.................................................................................................................................................... 139
ACL Resequencing......................................................................................................................................................... 140
Resequencing an ACL or Prex List.......................................................................................................................140
Route Maps......................................................................................................................................................................141
Implementation Information..................................................................................................................................... 141
Logging of ACL Processes............................................................................................................................................ 142
Guidelines for Conguring ACL Logging................................................................................................................143
Conguring ACL Logging.........................................................................................................................................143
Flow-Based Monitoring..................................................................................................................................................144
Behavior of Flow-Based Monitoring.......................................................................................................................144
Enabling Flow-Based Monitoring............................................................................................................................145
Conguring UDF ACL.................................................................................................................................................... 146
Conguring IP Mirror Access Group............................................................................................................................ 149
Sample Conguration.............................................................................................................................................. 150
Example of viewing IP mirror–access–group applied to an Interface............................................................... 150
8 Bidirectional Forwarding Detection (BFD)................................................................................................... 151
How BFD Works.............................................................................................................................................................. 151
BFD Packet Format..................................................................................................................................................152
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