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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 19 Configuring Bidirectional Forwarding Detection
Configuring BFD
Configuring BFD for BGP
Complete these steps to configure BFD for BGP.
Configuring BFD for IS-IS
This section describes how to configure BFD for IS-IS routing.
Configuring BFD for IS-IS on a Single Interface
Complete these steps to configure BFD for IS-IS on a single interface.
Command Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
• Enter your password if prompted.
Step 2
configure terminal
Example:
Router# configure terminal
Enters global configuration mode.
Step 3
Router(config)# router bgp
as-tag
Specifies a BGP process and enter router configuration mode.
Step 4
Router(config)# neighbor
ip-address
fall-over bfd
Enables support for BFD failover.
Step 5
exit
Example:
Router(config)# exit
Router#
Exits configuration mode.
Step 6
show bfd neighbors [details]
show ip bgp neighbor
Use the following commands to verify the BFD configuration:
• show bfd neighbors [details] —Verifies that the BFD neighbor is
active and displays the routing protocols that BFD has registered.
• show ip bgp neighbor—Displays information about BGP and TCP
connections to neighbors.
Command Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
• Enter your password if prompted.
Step 2
configure terminal
Example:
Router# configure terminal
Enters global configuration mode.