The mpls l2vpn pw ignore-ac-state command disables an AC interface from affecting the PW status when the AC interface's status changes.
The undo mpls l2vpn pw ignore-ac-state command restores the default configuration.
By default, the status change of an AC interface affects the PW status.
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Usage Scenario
In the reliability scenario where an LDP VC is configured to protect a CCC VC, when an AC interface goes Down, the PW status also goes Down. When the AC interface goes Up, the PW has to negotiate the status and reestablish a connection. At this time, if an active/standby PW switchover is being performed, traffic is switched back to the active PW only after the PW negotiation is complete. As a result, the switchback performance deteriorates. To improve the switchback performance, run the mpls l2vpn pw ignore-ac-state command. With this configuration, when an AC interface goes Down, its connected PW remains Up; when the AC interface goes Up, the PW does not have to reestablish a connection.
Prerequisites
A PW has been configured on an interface.
<HUAWEI> system-view [~HUAWEI] mpls [*HUAWEI-mpls] quit [*HUAWEI] mpls l2vpn [*HUAWEI-l2vpn] quit [*HUAWEI] interface GigabitEthernet 0/1/0 [*HUAWEI-GigabitEthernet0/1/0] mpls l2vc 1.1.1.1 10 [*HUAWEI-GigabitEthernet0/1/0] mpls l2vpn pw ignore-ac-state