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Table Of Contents
Configuring Filters Without a Sequence Number.................................................................................................... 109
Established Flag................................................................................................................................................................ 110
Configure Layer 2 and Layer 3 ACLs...........................................................................................................................110
Assign an IP ACL to an Interface..................................................................................................................................110
Applying an IP ACL...........................................................................................................................................................110
Counting ACL Hits............................................................................................................................................................ 111
Configure Ingress ACLs................................................................................................................................................... 111
Configure Egress ACLs................................................................................................................................................... 112
Applying Egress Layer 3 ACLs (Control-Plane)........................................................................................................ 112
IP Prefix Lists.................................................................................................................................................................... 113
Configuration Task List for Prefix Lists...................................................................................................................... 113
Creating a Prefix List.......................................................................................................................................................114
Creating a Prefix List Without a Sequence Number................................................................................................114
Viewing Prefix Lists......................................................................................................................................................... 115
Applying a Prefix List for Route Redistribution.........................................................................................................115
Applying a Filter to a Prefix List (OSPF).................................................................................................................... 116
ACL Remarks..................................................................................................................................................................... 116
Configuring a Remark................................................................................................................................................ 117
Deleting a Remark.......................................................................................................................................................117
ACL Resequencing........................................................................................................................................................... 118
Resequencing an ACL or Prefix List............................................................................................................................ 118
Route Maps........................................................................................................................................................................119
Important Points to Remember.................................................................................................................................... 119
Configuration Task List for Route Maps....................................................................................................................120
Creating a Route Map.................................................................................................................................................... 120
Configure Route Map Filters......................................................................................................................................... 121
Configuring Match Routes............................................................................................................................................ 122
Configuring Set Conditions........................................................................................................................................... 122
Configure a Route Map for Route Redistribution.................................................................................................... 123
Configure a Route Map for Route Tagging............................................................................................................... 123
Continue Clause............................................................................................................................................................... 124
Logging of ACL Processes............................................................................................................................................ 124
Guidelines for Configuring ACL Logging.................................................................................................................... 125
Configuring ACL Logging...............................................................................................................................................125
Flow-Based Monitoring Support for ACLs................................................................................................................ 126
Enabling Flow-Based Monitoring..................................................................................................................................127
Chapter 9: Bidirectional Forwarding Detection (BFD)................................................................ 129
How BFD Works...............................................................................................................................................................129
BFD Packet Format...................................................................................................................................................130
BFD Sessions............................................................................................................................................................... 131
BFD Three-Way Handshake.................................................................................................................................... 132
Session State Changes.............................................................................................................................................133
Important Points to Remember....................................................................................................................................133
Configure BFD.................................................................................................................................................................. 133
Configure BFD for Physical Ports..........................................................................................................................134
Enabling BFD Globally............................................................................................................................................... 134
Changing Physical Port Session Parameters...................................................................................................... 134
Disabling and Re-Enabling BFD.............................................................................................................................. 135
Configure BFD for Static Routes.................................................................................................................................135
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