ipv6 bfd all-interfaces

Format

ipv6 bfd all-interfaces { min-rx-interval receive-interval | min-tx-interval transmit-interval | detect-multiplier multiplier-value | frr-binding } ^*

undo ipv6 bfd all-interfaces { min-rx-interval [ receive-interval ] | min-tx-interval [ transmit-interval ] | detect-multiplier [ multiplier-value ] | frr-binding } ^*

Parameters

Parameter	Description	Value
min-rx-interval receive-interval	Specifies the minimum interval at which IPv6 BFD packets are received from the peer end.	The value is an integer ranging from 3 to 20000, in milliseconds. The default value is 10.
min-tx-interval transmit-interval	Specifies the minimum interval at which IPv6 BFD packets are sent to the peer end.	The value is an integer ranging from 3 to 20000, in milliseconds. The default value is 10.
detect-multiplier multiplier-value	Specifies the IPv6 BFD local detection multiplier.	The value ranges from 3 to 50. The default value is 3.
frr-binding	Associates IPv6 BFD session status with IPv6 IS-IS auto FRR. If IPv6 BFD detects a link fault on an interface, the IPv6 BFD session goes Down, triggering FRR. Traffic is then quickly switched to the backup link, minimizing service loss.	-

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 ipv6 bfd all-interfaces command can be used to configure parameters for IPv6 BFD sessions.

Prerequisites

BFD has been enabled globally, An IS-IS process has been created, the IS-IS process has been enabled on a specified interface, and IPv6 BFD has been enabled in the IS-IS process.

Configuration Impact

The minimum interval at which IPv6 BFD packets are received is obtained after the receive-interval value and the remote transmit-interval value are compared. If the local end does not receive any BFD packet from its neighbor within the period (minimum receiving interval x multiplier-value), the local end declares the neighbor Down.

Precautions

If only IPv6 BFD session parameters are configured but the ipv6 bfd all-interfaces enable command is not run, no IPv6 BFD sessions can be established.

The priority of BFD configured on an interface is higher than that of BFD configured in a process. If IPv6 BFD is enabled on an interface, IPv6 BFD sessions are established with the BFD parameters set on the interface.

Example

# Configure IPv6 BFD for an IS-IS process and specify the minimum interval at which IPv6 BFD packets are sent to 300 ms.

<HUAWEI> system-view
[~HUAWEI] isis
[*HUAWEI-isis-1] ipv6 enable
[*HUAWEI-isis-1] ipv6 bfd all-interfaces enable
[*HUAWEI-isis-1] ipv6 bfd all-interface min-tx-interval 300