Owners Manual

Implementation Information...................................................................................................... 138
Important Points to Remember........................................................................................................138
Configuration Task List for Route Maps..................................................................................... 139
Configuring Match Routes.......................................................................................................... 141
Configuring Set Conditions........................................................................................................ 143
Configure a Route Map for Route Redistribution...................................................................... 144
Configure a Route Map for Route Tagging................................................................................144
Continue Clause..........................................................................................................................145
Logging of ACL Processes................................................................................................................ 145
Guidelines for Configuring ACL Logging................................................................................... 146
Configuring ACL Logging............................................................................................................147
Flow-Based Monitoring Support for ACLs....................................................................................... 147
Behavior of Flow-Based Monitoring.......................................................................................... 148
Enabling Flow-Based Monitoring............................................................................................... 149
9 Bidirectional Forwarding Detection (BFD)...................................................151
How BFD Works.................................................................................................................................151
BFD Packet Format......................................................................................................................152
BFD Sessions................................................................................................................................154
BFD Three-Way Handshake........................................................................................................154
Session State Changes................................................................................................................ 155
Important Points to Remember........................................................................................................156
Configure BFD...................................................................................................................................156
Configure BFD for Physical Ports................................................................................................157
Configure BFD for Static Routes................................................................................................ 160
Configure BFD for OSPF............................................................................................................. 162
Configure BFD for OSPFv3..........................................................................................................165
Configure BFD for IS-IS...............................................................................................................166
Configure BFD for BGP...............................................................................................................169
Configure BFD for VRRP..............................................................................................................176
Configuring Protocol Liveness....................................................................................................179
Troubleshooting BFD.................................................................................................................. 179
10 Border Gateway Protocol IPv4 (BGPv4).....................................................181
Autonomous Systems (AS)................................................................................................................ 181
Sessions and Peers............................................................................................................................183
Establish a Session.......................................................................................................................184
Route Reflectors................................................................................................................................184
BGP Attributes................................................................................................................................... 185
Best Path Selection Criteria........................................................................................................ 186
Weight..........................................................................................................................................188
Local Preference......................................................................................................................... 188