(Optional) Configuring a DF Election Mode for EVPN VPWS

In an EVPN VPWS over MPLS scenario where a CE is multi-homed to PEs in single-active mode and no E-Trunk is configured, DF election needs to be performed between the PEs to determine the active/standby status of the PEs.

Context

On the EVPN VPWS multi-homing network shown in Figure 1, CE1 is multi-homed to PE1 and PE2, and PE1 and PE2 establish MPLS LDP tunnels with PE3, allowing CE1 to communicate with CE2. In a multi-homing single-active scenario where no E-Trunk is configured, to prevent CE1 from receiving duplicate traffic from both PE1 and PE2, DF election needs to be performed between the PEs to which CE1 is multi-homed, so that only one of PE1 and PE2 forwards BUM traffic.

Figure 1 Networking diagram for configuring MPLS E-Line
Click to enlarge

Procedure

Run system-view
The system view is displayed.
Run evpn
The global EVPN configuration view is displayed.
Run vpws-df-election type service-id
Service ID-based DF election is enabled.
Run commit
The configuration is committed.