Users Guide

• Congure BFD for OSPFv3
• Congure BFD for IS-IS
• Congure BFD for BGP
• Congure BFD for VRRP
• Conguring Protocol Liveness
•
Congure BFD for Physical Ports
Conguring BFD for physical ports is supported on the C-Series and E-Series platforms only.
BFD on physical ports is useful when you do not enable the routing protocol. Without BFD, if the remote system fails, the local system does
not remove the connected route until the rst failed attempt to send a packet. When you enable BFD, the local system removes the route
as soon as it stops receiving periodic control packets from the remote system.
Conguring BFD for a physical port is a two-step process:
1 Enable BFD globally.
2 Establish a session with a next-hop neighbor.
Related Conguration Tasks
• Viewing Physical Port Session Parameters.
• Disabling and Re-Enabling BFD.
Enabling BFD Globally
You must enable BFD globally on both routers.
To enable the BFD globally, use the following command.
• Enable BFD globally.
CONFIGURATION mode
bfd enable
Example of Verifying BFD is Enabled
To verify that BFD is enabled globally, use the show running bfd command.
The bold line shows that BFD is enabled.
R1(conf)#bfd ?
enable Enable BFD protocol
protocol-liveness Enable BFD protocol-liveness
R1(conf)#bfd enable
R1(conf)#do show running-config bfd
!
bfd enable
R1(conf)#
Viewing Physical Port Session Parameters
BFD sessions are congured with default intervals and a default role (active). Dell Networking recommends maintaining the default values.
To view session parameters, use the show bfd neighbors detail command.
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Bidirectional Forwarding Detection (BFD)