The peer bfd block command prevents a peer from inheriting the BFD function of its peer group.
The undo peer bfd block command restores the default configuration.
By default, a peer inherits the BFD function from its peer group.
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.
<HUAWEI> system-view [~HUAWEI] ip vpn-instance vpna [*HUAWEI-vpn-instance-vpna] ipv4-family [*HUAWEI-vpn-instance-vpna-af-ipv4] route-distinguisher 100:1 [*HUAWEI-vpn-instance-vpna-af-ipv4] vpn-target 111:1 both [*HUAWEI-vpn-instance-vpna-af-ipv4] quit [*HUAWEI-instance-vpna] quit [*HUAWEI] bgp 100 instance a [*HUAWEI-bgp-instance-a] ipv4-family vpn-instance vpna [*HUAWEI-bgp-instance-a-vpna] peer 10.1.1.1 as-number 100 [*HUAWEI-bgp-instance-a-vpna] peer 10.1.1.1 bfd block