VLAN tag manipulation: pop, push, and swap

You can configure your VLAN circuit cross-connect (CCC) logical interface on a Layer 2 circuit to handle dual-tag and single-tag packets. You can also use the l2circuit-control-passthrough statement at the [edit forwarding-options] hierarchy level to tunnel STP, LACP, LLDP, and CDP packets over the Layer 2 circuit after successful VLAN tag manipulation on the VLAN CCC logical interface. The VLAN CCC logical interface can be on a single Ethernet interface or on an aggregated Ethernet interface.