Reference Guide

Bidirectional Forwarding Detection (BFD) | 149
I - ISIS
O - OSPF
R - Static Route (RTM)
LocalAddr RemoteAddr Interface State Rx-int Tx-int Mult Clients
2.2.2.1 2.2.2.2 Gi 4/24 Up 100 100 4 R
View detailed session information using the command show bfd neighbors detail, as shown in the example
in
Verifying BFD sessions with BGP neighbors using show bfd neighbors detail.
Changing static route session parameters
BFD sessions are configured with default intervals and a default role. The parameters that can be
configured are: Desired TX Interval, Required Min RX Interval, Detection Multiplier, and system role.
These parameters are configured for all static routes; if you change a parameter, the change affects all
sessions for static routes.
To change parameters for static route sessions:
View session parameters using the command
show bfd neighbors detail, as shown in the example in
Verifying BFD sessions with BGP neighbors using show bfd neighbors detail.
Disabling BFD for static routes
If BFD is disabled, all static route BFD sessions are torn down. A final Admin Down packet is sent to all
neighbors on the remote systems, and those neighbors change to the Down state (Message 3).
To disable BFD for static routes:
Configuring BFD for OSPF
BFD for OSPF is only supported on platforms: e c z
When using BFD with OSPF, the OSPF protocol registers with the BFD manager on the RPM. BFD
sessions are established with all neighboring interfaces participating in OSPF. If a neighboring interface
fails, the BFD agent on the line card notifies the BFD manager, which in turn notifies the OSPF protocol
that a link state change occurred.
Step Task Command Syntax Command Mode
1 Change parameters for all static route
sessions.
ip route bfd interval milliseconds min_rx
milliseconds multiplier value role [active |
passive]
CONFIGURATION
Step Task Command Syntax Command Mode
1 Disable BFD for static routes. no ip route bfd CONFIGURATION