bfd all-interfaces (OSPF view)

Function

The bfd all-interfaces command sets parameter values for a BFD session.

The undo bfd all-interfaces command restores the default parameter values of a BFD session.

By default, BFD is disabled.

Format

bfd all-interfaces { min-tx-interval transmit-interval | min-rx-interval receive-interval | detect-multiplier multiplier-value | frr-binding } ^*

undo bfd all-interfaces { min-tx-interval [ transmit-interval ] | min-rx-interval [ receive-interval ] | detect-multiplier [ multiplier-value ] | frr-binding } ^*

Parameters

Parameter	Description	Value
min-tx-interval transmit-interval	Specifies the minimum interval at which BFD packets are sent to the remote end.	The value is an integer ranging from 3 to 20000, in milliseconds. The default value is 10.
min-rx-interval receive-interval	Specifies the minimum interval at which BFD packets are received from the remote end.	The value is an integer ranging from 3 to 20000, in milliseconds. The default value is 10.
detect-multiplier multiplier-value	Specifies the local detection multiplier.	The value is an integer ranging from 3 to 50. The default value is 3.
frr-binding	Associates the BFD session status with the link status on an interface. If BFD detects a link fault on an interface, the BFD session goes Down, triggering FRR. Traffic is then quickly switched to the backup link, minimizing service loss.	-

Views

OSPF view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
ospf	write

Usage Guidelines

Usage Scenario

Any link failure or topology change causes routers to re-calculate routes, and the convergence of routing protocols affects network performance.

If BFD is associated with routing protocols, BFD can fast detect faults and notify routing protocols of the faults immediately, which speeds up the convergence of routing protocols.

OSPF IP FRR requires the lower layer to fast respond to the link change so that traffic can be rapidly switched to the backup link if a link fails. In such a case, if frr-binding is configured, the association between the BFD session status and link status is enabled on an interface. If the BFD session on the interface becomes Down, the link goes Down immediately.

Example

# Configure BFD in an OSPF process and set the minimum interval at which BFD packets are sent to 30 ms.

<HUAWEI> system-view
[~HUAWEI] ospf
[*HUAWEI-ospf-1] bfd all-interfaces enable
[*HUAWEI-ospf-1] bfd all-interface min-tx-interval 30