The ipv6 bfd all-interfaces command configures parameters for IPv6 BFD sessions.
The undo ipv6 bfd all-interfaces command restores the default values.
By default, the minimum interval at which IPv6 BFD packets are sent or received is 10, in milliseconds; the IPv6 BFD local detection multiplier is 3.
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 } *
| 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. |
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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.<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