Patent ID: 8483218
Filing Date: 2013-07-09
Classification: H04L

Abstract:
1. A packet transport layer apparatus comprising: an I-component ingress to receive frames having different formats via a single first customer network port (CNP), assign a component identifier (ID) to a received frame according to a format of the received frame, and output an ingress I-tag frame via a first virtual output port by encapsulating the received frame with an ingress I-tag; a B-component ingress to output an ingress B-tag frame via a first physical output port (PNP) by encapsulating, with an ingress B-tag, the ingress I-tag frame received from the I-component ingress via a first virtual input port; a B-component egress to translate an egress B-tag frame, received via a second PNP, into an egress I-tag frame by removing an egress B-tag, and then output the egress I-tag frame via a second virtual output port; and an I-component egress to remove an egress I-tag from the egress I-tag frame received from the B-component egress via a second virtual input port, assign a component ID to the egress I-tag removed frame according to a format of the egress I-tag removed frame, translate a format of the egress I-tag removed frame according to the component ID and a T-component ID, and output the format-translated frame via a second CNP, wherein the 1-component ingress comprises: a frame classification part to classify a frame, received via the first CNP, according to a format of the frame, and forward the frame to any one of a customer virtual local area network (C-VLAN) aware I-component search part, an un-aware I-component search part and a service virtual LAN (S-VLAN) aware I-component search part; the C-VLAN aware 1-component search part to receive a C-tag frame from the frame classification part and assign a C-VLAN aware 1-component to the C-tag frame as a component ID, receive a C-tag frame tagged with a default VLAN ID from the un-aware 1-component search part, and acquire information about the first virtual output port by searching a filtering table; the un-aware 1-component search part to receive an untagged frame from the frame classification part, assign an un-aware I component to the untagged frame as a component ID, and allocate a default VLAN ID thereto as a C-VLAN ID (C-VID); the S-VLAN aware 1-component search part to receive an S-tag frame from the frame classification part, assign an S-VLAN aware I-component to the S-tag frame as a component ID, and acquire information about the first virtual output port by searching the filtering table; and an I-tag encapsulation part to create an I-tag, and tagging a frame with the I-tag, the frame being received from the C-VLAN aware I-component search part or the S-VLAN aware I-component search part.