Provider bridge commands configure the switch to use IEEE802.1ad stacked VLANs. Service providers use stacked VLANs- in which 801.Q VLAN tags are encapsulated in a second layer of 802.1Q tags 802.1Q-in-Q)—to enable a single VLAN to support customers who have multiple internal VLANs.
Provider bridge commands include data tunneling commands and L2 protocol tunneling commands.
- Data Tunneling Commands define service instances and apply them to specific ports.
- L2 Protocol Tunneling Commands enable using Layer 2 protocols across customer networks at different sites that are connected through a service provider network.
