Double VLAN tags on Layer 3 subinterfaces

You can configure double VLAN tags on Layer 3 subinterfaces (also called Layer 3 logical interfaces) on devices. Layer 3 double-tagged logical interfaces support inet, inet6, and mpls families. Support for double-tagging VLANs on Layer 3 logical interfaces includes:

• Configuration of an IPv4, an IPv6, or an mpls family on the logical interface
• Configuration over an aggregated Ethernet interface
• Configuration of multiple logical interfaces on a single physical interface