Service Manual
Configure Layer 2 and Layer 3 ACLs.................................................................................................141
Assign an IP ACL to an Interface.......................................................................................................142
Applying an IP ACL............................................................................................................................142
Counting ACL Hits.......................................................................................................................143
Configure Ingress ACLs.....................................................................................................................143
Configure Egress ACLs..................................................................................................................... 144
Applying Egress Layer 3 ACLs (Control-Plane).......................................................................... 145
IP Prefix Lists......................................................................................................................................145
Implementation Information...................................................................................................... 146
Configuration Task List for Prefix Lists....................................................................................... 146
ACL Resequencing............................................................................................................................150
Resequencing an ACL or Prefix List............................................................................................ 151
Route Maps........................................................................................................................................152
Implementation Information.......................................................................................................152
Logging of ACL Processes................................................................................................................ 152
Guidelines for Configuring ACL Logging....................................................................................153
Configuring ACL Logging............................................................................................................154
Flow-Based Monitoring Support for ACLs....................................................................................... 155
Behavior of Flow-Based Monitoring...........................................................................................155
Enabling Flow-Based Monitoring................................................................................................157
Configuring UDF ACL........................................................................................................................158
9 Bidirectional Forwarding Detection (BFD)...................................................161
How BFD Works.................................................................................................................................161
BFD Packet Format......................................................................................................................162
BFD Sessions............................................................................................................................... 164
BFD Three-Way Handshake........................................................................................................164
Session State Changes................................................................................................................ 165
Important Points to Remember........................................................................................................166
Configure BFD...................................................................................................................................166
Configure BFD for Physical Ports................................................................................................167
Configure BFD for Static Routes.................................................................................................170
Configure BFD for OSPF..............................................................................................................172
Configure BFD for OSPFv3..........................................................................................................175
Configure BFD for IS-IS...............................................................................................................176
Configure BFD for BGP............................................................................................................... 179
Configure BFD for VRRP............................................................................................................. 186
Configuring Protocol Liveness................................................................................................... 189
Troubleshooting BFD..................................................................................................................189
10 Border Gateway Protocol IPv4 (BGPv4).....................................................191
Autonomous Systems (AS)................................................................................................................ 191
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