(Optional) Configuring the Working Mode of an Eth-Trunk in an E-Trunk

Procedure

1. Run system-view

   The system view is displayed.

2. Run interface eth-trunk trunk-id

   The Eth-Trunk interface view is displayed.

   Only Eth-Trunks in LACP mode can be added to an E-Trunk.

3. Run e-trunk mode { auto | force-master | force-backup }

   A working mode of the Eth-Trunk in the E-Trunk is configured.

   By default, an Eth-Trunk in an E-Trunk works in automatic mode.

   The e-trunk mode command is valid only for the Eth-Trunk in an E-Trunk. When the Eth-Trunk is deleted from the E-Trunk, the configuration is deleted automatically.

   When an Eth-Trunk works in automatic mode, its master/backup status is controlled by the E-Trunk status of the local device and fault information of the remote Eth-Trunk.

   • If the local E-Trunk is the master, the local Eth-Trunk works in master state.

   • If the local E-Trunk is the backup and the remote member Eth-Trunk fails, the local Eth-Trunk works in master state. When the local Eth-Trunk receives a notification that the remote Eth-Trunk has recovered, the local Eth-Trunk becomes the backup.

   

   When an E-Trunk is working normally, changing the hello packet sending interval or timeout interval may cause flapping of the E-Trunk between master and backup devices. Before changing the hello packet sending interval or timeout interval, you are advised to configure member Eth-Trunks to work in forcible master/backup state. After the new configuration takes effect, restore the working mode to automatic.