bfd all-interfaces(OSPF)

Function

The bfd all-interfaces command enables bidirectional forwarding detection (BFD) in an OSPF process and sets the parameter values of a BFD session.

The undo bfd all-interfaces command disables BFD in an OSPF process and restores the default parameter values of a BFD session.

By default, BFD is disabled.

Product	Support
S5720-EI, S5720-HI, S5720I-SI, S5720S-SI, S5720-SI, S5735-S, S5735S-S, S5735-S-I, S5730-HI, S5730S-EI, S5730-SI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6720S-SI, S6720-SI, S6730-H, S6730S-H, S6730-S, and S6730S-S	Supported
S2720-EI, S5720-LI, S5735-L, S5735S-L, S5735S-L-M, S5720S-LI, S6720-LI, and S6720S-LI	Not supported

Format

bfd all-interfaces enable

undo bfd all-interfaces enable

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

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

Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support the frr-binding parameter.

Parameters

Parameter	Description	Value
min-rx-interval receive-interval	Indicates the minimum interval at which BFD packets are received from the remote end.	The value is an integer that ranges from 100 to 1000, in milliseconds. After the set service-mode enhanced command is configured on the S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, and S6720-HI, the value ranges from 3 to 1000. After the set service-mode enhanced-bfd command is configured on the S5732-H, S6730-H, S6730S-H, S6730-S, and S6730S-S, the value ranges from 3 to 1000.
min-tx-interval transmit-interval	Indicates the minimum interval at which BFD packets are sent to the remote end.	The value is an integer that ranges from 100 to 1000, in milliseconds. After the set service-mode enhanced command is configured on the S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, and S6720-HI, the value ranges from 3 to 1000. After the set service-mode enhanced-bfd command is configured on the S5732-H, S6730-H, S6730S-H, S6730-S, and S6730S-S, the value ranges from 3 to 1000.
detect-multiplier multiplier-value	Indicates the local detection multiplier.	The value is an integer ranging from 3 to 50. By default, it is 3.
frr-binding	Binds the BFD status to the link status of an interface.	-

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When a device communicates with its neighbors, BFD can fast detect faults to minimize the fault impact on services.

You can bind a BFD session to an interface or an OSPF process. If a BFD session is bound to both an interface and an OSPF process, the BFD session bound to an interface takes precedence over that bound to an OSPF process.

Precautions

receive-interval is negotiated between local min-rx-interval and remote min-tx-interval. The smaller of local min-rx-interval and remote min-tx-interval is used as the remote min-tx-interval. If the local end does not receive any BFD packets within the interval of receive-interval × multiplier-value (local detection multiplier), it declares that the remote end is unreachable.
An OSPF device sets up BFD sessions with only the neighbors in Exstart state. Two ends can set up a BFD session only when the bfd command is run on both ends to configure BFD globally and the bfd all-interfaces enable command is run.
The bfd all-interfaces command and the ospf bfd block command are mutually exclusive.

Example

# Configure BFD in an OSPF process and set the minimum interval for sending BFD packets to 400 ms.

<HUAWEI> system-view

[HUAWEI] ospf

[HUAWEI-ospf-1] bfd all-interfaces enable

[HUAWEI-ospf-1] bfd all-interfaces min-tx-interval 400