peer bfd block
Function
The peer bfd blcok command prohibits a peer from inheriting the BFD function from its peer group.
The undo peer bfd block command restores a peer to inherit the BFD function from its peer group.
By default, the peer inherits the BFD function from its peer group.
Format
peer { ipv4-address | ipv6-address } bfd block
undo peer { ipv4-address | ipv6-address } bfd block
Parameters
| Parameter | Description | Value |
|---|---|---|
| ipv4-address | Specifies the IPv4 address of a peer. | It is in dotted decimal notation. |
| ipv6-address | Specifies the IPv6 address of a peer. | The value is a 32-bit hexadecimal number in X:X:X:X:X:X:X:X format. |
Usage Guidelines
Usage Scenario
BFD provides millisecond-level fault detection. It helps BGP to detect faults in neighboring devices or links more quickly, and instructs BGP to recalculate routes for correct packet forwarding. If a peer group is configured with BFD, all members of the peer group will establish BFD sessions. The peer bfd block command can be used to prevent a peer from inheriting the BFD function from its peer group.
Prerequisites
A BFD session has been established.
Configuration Impact
After the peer bfd block command is run on a peer, the corresponding BFD session on the peer is deleted. As a result, fast link fault detection cannot be implemented.
Precautions
The peer bfd block command and the peer bfd enable command are mutually exclusive. After the peer bfd block command is run, related BFD sessions are automatically deleted.