(Optional) Configuring the Global Redundancy Mode

A PE's global redundancy mode determines whether the PE can work with other PEs in load-balancing mode.

Context

By default, EVPN PEs work in all-active mode. If a CE is multi-homed to several EVPN PEs, these PEs will load-balance traffic. If you do not want to transmit traffic in load balancing mode, you can change the global redundancy mode of PEs to the single-active mode. When PEs work in all-active mode, each PE is in the active state. When PEs work in single-active mode, one PE is in the active state, and the other PEs are in the standby state.

Currently, either of the following methods can be used to determine the active/standby status of PEs:

The active/standby status is determined by an E-Trunk. In this case, the CE needs to be configured with an Eth-Trunk interface to connect to the PE, and the PE also needs to be configured with an Eth-Trunk interface to connect to the CE.
The active/standby status is determined based on the DF election result. In this case, a CE can be connected to a PE through an Eth-Trunk or a common physical interface, and no additional E-Trunk needs to be configured.

Currently, the active/standby status of PEs can be determined based on the DF election result only in single-active scenarios. In all-active scenarios, the status of multiple PEs needs to be set to active through the E-Trunk interface.

Perform the following steps on all-active PEs as required.

Procedure

The E-Trunk is used to determine the active/standby status.
1. Run system-view
  The system view is displayed.
2. Run e-trunk e-trunk-id
  An E-Trunk is configured, and its view is displayed.
3. Run priority priority
  An E-Trunk priority value is set.
4. Run peer-address peer-ip-address source-address source-ip-address
  IP addresses are configured for the local and peer ends of the E-Trunk.
5. Run quit
  Return to the system view.
6. Run interface eth-trunk trunk-id
  The Eth-Trunk interface view is displayed.
7. Run e-trunk e-trunk-id
  The Eth-Trunk interface is added to the E-Trunk.
  
  An Eth-Trunk interface can be added to only one E-Trunk.
8. (Optional) Run e-trunk mode force-master
  The E-Trunk member interface is forced to work in master mode.
  
  In an all-active scenario, you need to run this command to set the status of multiple PEs to master to implement load balancing. In single-active scenarios, this command cannot be configured on PEs.
9. Run quit
  Return to the system view.
10. Run lacp e-trunk system-id mac-address
  An E-Trunk Link Aggregation Control Protocol (LACP) system ID is set.
11. (Optional) Run lacp e-trunk priority priority
  An E-Trunk LACP system priority value is set.
  
  The LACP system IDs for the same E-Trunk must be the same. The LACP system priority values for the same E-Trunk must be the same.
12. (Optional) Run evpn redundancy-mode single-active
  The global redundancy mode is set to single-active.
  
  In single-active scenarios, this command must be configured on PEs. In all-active scenarios, this command cannot be configured on PEs.
13. Run commit
  The configuration is committed.
The active/standby status is determined based on the DF election result, (which applies to the single-active scenario).
1. Run system-view
  The system view is displayed.
2. Run evpn
  The global EVPN configuration view is displayed.
3. Run esi esi
  A static ESI instance name is configured. The esi value must be the same as the name of the statically configured ESI.
4. Run evpn redundancy-mode single-active df-election
  The device is enabled to determine the active/standby status based on the DF election result when static ESI instances work in single-active mode.
  
  After the configuration is complete, the PE that is elected as the DF is in the active state, and the PEs that are not elected as DFs are in the standby state.
  
  Currently, the active/standby status can be determined based on the DF election result only in the static ESI view. Therefore, you need to configure static ESIs when configuring ESIs for interfaces.
5. Run commit
  The configuration is committed.