Method and Device for VLAN Interface Routing

A method for routing frames via a node with at least one Virtual Local Area Network (VLAN) interface which is configured to process frames associated with at least one VLAN, said method comprising:

• receiving an ingress frame at a source physical port of said node, wherein said ingress frame carries one or more VLAN tags and each of said VLAN tags is arranged to identify one VLAN ID;
• determining a forwarding destination for said frame within or among at least one service domain, wherein each of said at least one service domain is specified by one service ID and at least one service interface ID associated with said service ID, wherein said service ID is one-to-one mapped with one VLAN interface, and each of said at least one service interface ID is mapped to a combination of at least one VLAN_ID and a physical port ID;
• and
• transmitting a corresponding egress frame at a destination physical port of said node, wherein said egress frame carries one or more VLAN tags and each of said VLAN tags is arranged to identify one VLAN ID.

A network node device for routing frames via at least one Virtual Local Area Network (VLAN) interface, which is configured to process frames associated with at least one VLAN, said network node device comprising:

• a receiving unit configured to receive an ingress frame at a source physical port of said network node device, wherein said ingress frame carries one or more VLAN tags and each of said VLAN tags is arranged to identify one VLAN ID;
• a determining unit configured to determine a forwarding destination for said frame within or among at least one service domain, wherein each of said at least one service domain is specified by one service ID and at least one service interface ID associated with said service ID, wherein said service ID is one-to-one mapped with one VLAN interface, and each of said at least one service interface ID is mapped to a combination of at least one VLAN_ID and a physical port ID;
• and
• a transmitting unit configured to transmit a corresponding egress frame at a destination physical port of said network node device, wherein said egress frame carries one or more VLAN tags and each of said VLAN tags is arranged to identify one VLAN ID.