Users Guide
Configuring Filters with a Sequence Number............................................................ 150
Configuring Filters Without a Sequence Number......................................................152
Configure Layer 2 and Layer 3 ACLs.................................................................................. 153
Assign an IP ACL to an Interface......................................................................................... 153
Applying an IP ACL................................................................................................................. 154
Counting ACL Hits............................................................................................................ 155
Configure Ingress ACLs.........................................................................................................155
Configure Egress ACLs..........................................................................................................156
Applying Egress Layer 3 ACLs (Control-Plane)...........................................................157
IP Prefix Lists............................................................................................................................ 157
Implementation Information..........................................................................................158
Configuration Task List for Prefix Lists.........................................................................158
ACL Resequencing................................................................................................................. 162
Resequencing an ACL or Prefix List..............................................................................163
Route Maps..............................................................................................................................164
Implementation Information..........................................................................................164
Logging of ACL Processes....................................................................................................164
Guidelines for Configuring ACL Logging.................................................................... 166
Configuring ACL Logging............................................................................................... 166
Flow-Based Monitoring Support for ACLs........................................................................ 167
Behavior of Flow-Based Monitoring.............................................................................167
Enabling Flow-Based Monitoring..................................................................................169
9 Bidirectional Forwarding Detection (BFD).......................................................................171
How BFD Works...................................................................................................................... 171
BFD Packet Format...........................................................................................................173
BFD Sessions......................................................................................................................175
BFD Three-Way Handshake............................................................................................175
Session State Changes.....................................................................................................177
Important Points to Remember...........................................................................................177
Configure BFD.........................................................................................................................178
Configure BFD for Physical Ports..................................................................................178
Configure BFD for Static Routes....................................................................................181
Configure BFD for OSPF................................................................................................. 183
Configure BFD for OSPFv3.............................................................................................186
Configure BFD for IS-IS...................................................................................................187
Configure BFD for BGP................................................................................................... 190
Configure BFD for VRRP..................................................................................................197
Configuring Protocol Liveness......................................................................................200
Troubleshooting BFD......................................................................................................200
10 Border Gateway Protocol IPv4 (BGPv4)........................................................................ 202
9.10(0.0)
7