bfd all-interfaces enable

Function

The bfd all-interfaces enable command enables BFD in an IS-IS process.

The undo bfd all-interfaces enable command disables BFD from an IS-IS process.

By default, BFD is disabled in an IS-IS process.

Format

bfd all-interfaces enable

undo bfd all-interfaces enable

Parameters

None

Views

IS-IS view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
isis	write

Usage Guidelines

Usage Scenario

BFD can provide millisecond-level fault detection, help IS-IS to detect the faults that occur on neighboring devices or links more quickly, and instruct IS-IS to recalculate routes for correct packet forwarding. The bfd all-interfaces enable command enables BFD in an IS-IS process.

Prerequisites

BFD has been enabled globally, An IS-IS process has been created, and the IS-IS process has been started on a specified interface.

Configuration Impact

After the bfd all-interfaces enable command is run, the local end can establish a BFD session with its neighbor through a specified interface and periodically send BFD packets on this session.

Precautions

If BFD is not enabled globally, you can configure IS-IS BFD, but a BFD session cannot be established.

When BFD is enabled in the IS-IS process using the bfd all-interfaces enable command, no BFD session is established on the interface in the following cases:

The isis bfd block command is run on the interface to block BFD from the interface. To establish a BFD session on the interface, run the undo isis bfd block command.
When the isis bfd static command is run on the interface, no BFD session is established on the interface. To establish a BFD session on the interface, run the undo isis bfd static command.
The priority of BFD configured on an interface is higher than that of BFD configured in a process. If BFD is enabled on an interface, a BFD session is established according to the BFD parameters set on the interface.
This command conflicts with multi-instance enable iid command.

Example

# Configure BFD in an IS-IS process.

<HUAWEI> system-view
[~HUAWEI] isis
[*HUAWEI-isis-1] bfd all-interfaces enable