isis bfd enable

Function

The isis bfd enable command enables BFD on the specified IS-IS interface.

The undo isis bfd enable command disables BFD from the interface.

By default, BFD is not enabled on IS-IS interfaces.

Format

isis bfd enable

undo isis bfd enable

Parameters

None

Views

Ethernet interface view, Ethernet sub-interface view, Eth-Trunk interface view, Eth-Trunk sub-interface view, Tunnel interface view, Loopback interface view, Dialer interface view, VLANIF interface view, Virtual-Template interface view

Default Level

2: Configuration level

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 rapidly, and instruct IS-IS to recalculate routes for correct packet forwarding. The isis bfd enable command can be used to enable BFD on a specified IS-IS interface and set up BFD sessions by using default parameters.

Prerequisites

BFD has been enabled globally and an IS-IS process has been enabled on a specified interface.

Precautions

If the isis bfd block, isis bfd enable, and isis bfd static commands are run, only the last command takes effect.

Example

# Enable BFD on GigabitEthernet0/0/0.

<sysname> system-view
[sysname] interface GigabitEthernet0/0/0
[sysname-GigabitEthernet0/0/0] isis bfd enable