vrrp6 recover-delay

Function

The vrrp6 recover-delay command sets a status recovery delay for all Virtual Router Redundancy Protocol for IPv6 (VRRP6) backup groups.

The undo vrrp6 recover-delay command restores the default status recovery delay.The default status recovery delay is 0 seconds, indicating that VRRP6 backup group flapping is not suppressed.

By default, the status recovery delay for all VRRP6 groups is 0 seconds, indicating that VRRP6 group flapping is not suppressed.

Format

vrrp6 recover-delay delay-value

undo vrrp6 recover-delay

Parameters

Parameter	Description	Value
delay-value	Specifies a status recovery delay for all VRRP6 backup groups.	The value is an integer ranging from 0 to 3600, in seconds.

Parameter

Description

Value

delay-value

Specifies a status recovery delay for all VRRP6 backup groups.

The value is an integer ranging from 0 to 3600, in seconds.

Views

100ge sub-interface view, 100GE interface view, 10GE sub-interface view, 10GE interface view, 200GE sub-interface view, 25GE sub-interface view, 25GE interface view, 400GE sub-interface view, 400GE interface view, 40GE sub-interface view, 40GE interface view, 50GE sub-interface view, 50GE interface view, Eth-Trunk sub-interface view, Eth-Trunk interface view, FlexE interface view, GE optical interface view, GE sub-interface view, GE interface view, GE electrical interface view, Global VE sub-interface view, VE sub-interface view, VLANIF interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
vrrp	write

Usage Guidelines

Usage Scenario

If the status of the interface on which a VRRP6 group resides frequently changes, the VRRP6 group frequently flaps. To prevent this situation, run the vrrp6 recover-delay command to set a status recovery delay to suppress VRRP6 group flapping.

When a device or board is restarted and a large number of services are configured, the backup device may not immediately receive protocol packets from the master device after the restart. As a result, the backup device becomes the master device because it does not receive protocol packets within a specified period, causing VRRP6 status flapping or the configured preemption delay to fail to take effect. To prevent this problem, run the vrrp6 recover-delay command to set a status recovery delay for the VRRP6 group.

Configuration Impact

After a status recovery delay is set for a VRRP6 backup group, the VRRP6 backup group responds to a received interface Up event only after the configured status recovery delay elapses, which prevents interface flapping from causing VRRP6 backup group flapping.

Example

# Set the status recovery delay for all VRRP6 backup groups to 5 seconds in the interface view.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/0
[~HUAWEI-GigabitEthernet0/1/0] ipv6 enable
[*HUAWEI-GigabitEthernet0/1/0] ipv6 address 2001:db8::1 127
[*HUAWEI-GigabitEthernet0/1/0] vrrp6 vrid 10
[*HUAWEI-GigabitEthernet0/1/0] vrrp6 recover-delay 5