Configuring AC Dual-Homing Protection

If a CE is dual-homed to two PEs, configure MC-LAG to implement AC dual-homing protection.

Context

In a scenario in which a CE is dual-homed to two PEs and the active/standby AC status needs to be determined by E-Trunk.

Procedure

Configure an Eth-Trunk interface.
1. Run system-view
  The system view is displayed.
2. Run interface eth-trunk trunk-id
  An Eth-Trunk interface is created.
3. (Optional) Run portswitch
  The Eth-Trunk interface is switched to Layer 2 mode.
  
  This command is needed only on CEs. The Eth-Trunk sub-interfaces on PEs are the AC interfaces for PWs.
4. Run mode lacp-static
  The working mode of the Eth-Trunk interface is configured as the static LACP mode.
5. (Optional) Run port trunk allow-pass vlan { { vlan-id1 [ to vlan-id2 ] } &<1-10> | all }
  The Eth-Trunk interface is configured to allow packets with specified VLAN tags to pass through.
  
  This command is needed only on CEs, and the specified VLANs must be configured on the CEs.
6. Run trunkport interface-type interface-number
  An interface is added to the Eth-Trunk interface.
7. Run quit
  Return to the system view.
8. Run commit:
  The configuration is committed.
Configure E-Trunk.
1. Run lacp e-trunk system-id mac-address
  An E-Trunk LACP system ID is configured.
  
  mac-address is in the format of H-H-H and cannot be all 0s or Fs.
  
  The LACP system IDs of the master and backup devices in an E-Trunk mechanism must be the same.
2. Run lacp e-trunk priority priority
  An E-Trunk LACP priority is configured.
  
  The LACP priorities of the master and backup devices in an E-Trunk mechanism must be the same.
3. Run e-trunk e-trunk-id
  An E-Trunk mechanism is created.
4. Run priority priority
  priority is an integer ranging from 1 to 254. The default value is 100. The smaller the priority value, the higher the priority.
5. Run peer-address peer-ip-address source-address source-ip-address
  The local and peer IP addresses are configured.
6. Run quit
  Return to the system view.
7. Run interface eth-trunk trunk-id
  The Eth-Trunk interface view is displayed.
8. Run e-trunk e-trunk-id
  The Eth-Trunk interface is added to the E-Trunk mechanism.
9. Run quit
  Return to the system view.
10. Run commit
  The configuration is committed.