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Command Reference

CloudEngine 8800, 7800, 6800, and 5800 V200R002C50

This document describes all the configuration commands of the device, including the command function, syntax, parameters, views, default level, usage guidelines, examples, and related commands.
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bfd all-interfaces(OSPFv3)

bfd all-interfaces(OSPFv3)

Function

The bfd all-interfaces enable command enables BFD for OSPFv3.

The bfd all-interfaces { min-receive-interval receive-interval | min-transmit-interval transmit-interval | detect-multiplier multiplier-value | frr-binding } * command sets the parameter values of a BFD session.

The undo bfd all-interfaces enable command disables BFD for OSPFv3.

The undo bfd all-interfaces { min-receive-interval [ receive-interval ] | min-transmit-interval [ transmit-interval ] | detect-multiplier [ multiplier-value ] | frr-binding } * command restores the default parameter values of a BFD session.

By default, BFD is not enabled or configured at OSPFv3 process level.

Format

bfd all-interfaces enable

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

undo bfd all-interfaces enable

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

Parameters

Parameter Description Value
enable Enables BFD for OSPFv3. -
min-receive-interval receive-interval Specifies the minimum interval for receiving BFD packets from the peer.

The value is an integer. The value ranges from 3 to 1000 on the CE6880EI and 50 to 1000 on other models. The value is expressed in milliseconds. The default value is 1000 ms.

min-transmit-interval transmit-interval Specifies the minimum interval for transmitting BFD packets to the peer.

The value is an integer. The value ranges from 3 to 1000 on the CE6880EI and 50 to 1000 on other models. The value is expressed in milliseconds. The default value is 1000 ms.

detect-multiplier multiplier-value Specifies the local detection multiplier. The value is an integer ranging from 3 to 50. By default, it is 3.
frr-binding Associates the BFD session status with the link status of an interface. -

Views

OSPFv3 view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The value of receive-interval is obtained after negotiation between the local min-receive-interval and the remote min-transmit-interval. If no BFD packets are received from the peer within the local actual detection time, the peer is declared to Down. Local actual detection time = receive-interval x multiplier-value.

If BFD is not configured globally, BFD can be configured for OSPFv3, but BFD sessions cannot be established. Similarly, if only the parameters of a BFD session are set, but the bfd all-interfaces enable command is not run, BFD sessions cannot be established.

During the configuration of OSPFv3 IP FRR, the lower layer needs to fast respond to a link change so that traffic can be rapidly switched to the backup link if the primary link fails. By setting the parameter frr-binding, you can associate the BFD session status with the link status of an interface (when the BFD session goes Down, the link status of the interface becomes Down) so that link faults can be rapidly detected.

Precautions

After BFD is enabled, OSPFv3 establishes BFD sessions only with the neighbors in the Full state.

The preference of BFD configured on an interface is higher than that configured in the process.

The bfd all-interfaces (OSPFv3) command and the ospfv3 bfd block command are mutually exclusive.

Example

# Enable BFD on an OSPFv3 process.

<HUAWEI> system-view
[~HUAWEI] ospfv3 1
[*HUAWEI-ospfv3-1] bfd all-interfaces enable
[*HUAWEI-ospfv3-1] bfd all-interfaces min-transmit-interval 80
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Updated: 2019-03-21

Document ID: EDOC1000166501

Views: 73898

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