(Optional) Configuring a Working Mode for an E-Trunk Member Interface

To enable proper traffic transmission, configure a working mode for an E-Trunk member interface. An E-Trunk member interface can work in automatic, forcible master, or forcible backup mode.

Context

If a member interface in an E-Trunk works in automatic mode or is switched to the automatic mode from the forcible master or backup mode, the master/backup status of the member interface is determined by the master/backup status of the local E-Trunk and the peer member interface status.

If the local E-Trunk works in master mode, the local member interface also works in master mode.
If the local E-Trunk works in backup mode and the peer member interface fails, the local member interface works in master mode. If the local member interface receives a recovery message from the peer member interface, the local member interface enters the backup mode.

When E-Trunk member interfaces work in automatic mode, a change in the interval at which Hello packets are exchanged or the timeout period will result in master/backup status flapping. Therefore, configure the member interfaces to work in forcible master/backup mode before changing the interval at which Hello packets are exchanged. After master/backup status negotiation is complete, restore the member interfaces to the automatic mode.

Procedure

Configure a working mode for a member Eth-Trunk interface of an E-Trunk.
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-Trunk interfaces in static LACP mode or manual load balancing mode can be added to E-Trunks.
  
  If an Eth-Trunk interface in static LACP mode is added to an E-Trunk, do not configure the maximum number of active links for the Eth-Trunk interface on each of the dual-homing E-Trunk-enabled devices for user access. Otherwise, LACP cannot select correct interfaces as active interfaces for service forwarding.
3. Run e-trunk mode mode-type }
  
  A working mode is configured for the Eth-Trunk interface that is added to the E-Trunk.In a dual-homing active-active scenario, you need to specify force-master on the Eth-Trunk interfaces to enable the Eth-Trunk interfaces to work in master state.
Configure a working mode for a member global VE interface of an E-Trunk.
1. Run system-view
  
  The system view is displayed.
2. Run interface global-ve ve-number
  
  A global VE interface is created, and its view is displayed.
3. Run e-trunk mode mode-type }
  
  A working mode is configured for the global VE interface that is added to the E-Trunk.In a dual-homing active-active scenario, you need to specify force-master on the global VE interfaces to enable the global VE interfaces to work in master state.