(Optional) Configuring a Period for an AC Interface to Restore a Blocked Interface
Context
After an AC interface enabled with L2VPN loop detection detects a loop, a period can be specified for the AC interface to restore a blocked interface. That is, if a blocked interface does not receive any L2VPN loop detection packet within the period specified by recovery-time, it will be restored to normal state.
If a device is on multiple loops, interfaces on the device may alternate between blocked and normal states during the initial detection stage. To prevent interface status flapping, you are advised to set recovery-time to a larger value.
Perform the following operations on the PE.
Procedure
- Run system-view
The system view is displayed.
- Run interface interface-type interface-number
The interface view is displayed.
- (Optional) On an Ethernet interface, run undo portswitch
The interface is switched to Layer 3 mode.
By default, an Ethernet interface works in Layer 2 mode.
Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support switching between Layer 2 and Layer 3 modes.
- Run loop-detect recovery-time recovery-time
A period is configured for an AC interface to restore a blocked interface.
By default, an AC interface restores a blocked interface every 15 seconds.