The Ethernet rings are supported Layer 2 service, VPLS, I-VPLS, R-VPLS, and B-VPLS instances. The following considerations apply:
Only ports in access mode can be configured as Ethernet-ring paths. The ring ports can be located on the same or different media adapter cards.
Dot1q and QinQ ports are supported as Ethernet-ring path members.
A mix of regular and multiple Ethernet-ring SAPs and pseudowires can be configured in the same services.