Configuring Bfd For Vrrp - Dell Force10 C150 Configuration Manual

Disabling BFD for IS-IS
If BFD is disabled globally, all sessions are torn down, and sessions on the remote system are placed in a
Down state. If BFD is disabled on an interface, sessions on the interface are torn down, and sessions on the
remote system are placed in a Down state
change in BFD clients; a final Admin Down packet is sent before the session is terminated.
To disable BFD sessions with all IS-IS neighbors:
Step Task
1 Disable BFD sessions with all IS-IS
neighbors.
To disable BFD sessions with all IS-IS neighbors out of an interface:
Step Task
1 Disable BFD sessions with all IS-IS
neighbors out of an interface

Configuring BFD for VRRP

When using BFD with VRRP, the VRRP protocol registers with the BFD manager on the RPM. BFD
sessions are established with all neighboring interfaces participating in VRRP. If a neighboring interface
fails, the BFD agent on the line card notifies the BFD manager, which in turn notifies the VRRP protocol
that a link state change occurred.
Configuring BFD for VRRP is a three-step process:
1. Enable BFD globally. See
2. Establish VRRP BFD sessions with all VRRP-participating neighbors.
3. On the master router, establish a VRRP BFD sessions with the backup routers. See page 195.
Related configuration tasks
• Change session parameters. See page 197.
• Disable or re-enable BFD on an interface. See page 182.
Establishing sessions with all VRRP neighbors
BFD sessions can be established for all VRRP neighbors at once, or a session can be established with a
particular neighbor.
(Message 3 on page
Command Syntax
no bfd all-neighbors
Command Syntax
isis bfd all-neighbors disable
Enabling BFD globally on page
179). Disabling BFD does not trigger a
Command Mode
ROUTER-ISIS
Command Mode
INTERFACE
176.
Bidirectional Forwarding Detection | 195