Method and apparatus for forwarding packets in an ethernet passive optical network
First Claim
1. A method for forwarding packets in an Ethernet passive optical network (EPON) which includes a central node and at least one remote node, the method comprising:
- assigning a logical link identifier (LLID) to a remote node, wherein an LLID corresponds to a logical link between the central node and a remote node, associating an LLID with a port of a switch within the central node, wherein the switch has a number of ports;
wherein a port may be a physical port or a virtual port; and
wherein the number of ports on the switch are divided into network-side ports and user-side ports;
receiving a downstream packet from a network-side port;
searching a mapping table to determine whether one or more field values of the downstream packet correspond to any LLIDs or ports; and
if the one or more field values correspond to an LLID, assigning the LLID to the downstream packet and transmitting the downstream packet to a remote node.
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Abstract
One embodiment of the present invention provides a system that facilitates forwarding of packets in an Ethernet passive optical network (EPON), which includes a central node and at least one remote node. During operation, the system assigns a logical link identifier (LLID) to a remote node, wherein an LLID corresponds to a logical link between the central node and a remote node. The system also associates an LLID with a port of a switch within the central node, wherein the switch has a number of ports; wherein a port may be a physical port or a virtual port; and wherein the number of ports on the switch are divided into network-side ports and user-side ports. Upon receiving a downstream packet from a network-side port, the system searches a mapping table to determine whether one or more field values of the downstream packet correspond to any LLIDs or ports. If the one or more field values correspond to an LLID, the system assigns the LLID to the downstream packet and transmits the downstream packet to a remote node.
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Citations
52 Claims
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1. A method for forwarding packets in an Ethernet passive optical network (EPON) which includes a central node and at least one remote node, the method comprising:
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assigning a logical link identifier (LLID) to a remote node, wherein an LLID corresponds to a logical link between the central node and a remote node, associating an LLID with a port of a switch within the central node, wherein the switch has a number of ports;
wherein a port may be a physical port or a virtual port; and
wherein the number of ports on the switch are divided into network-side ports and user-side ports;
receiving a downstream packet from a network-side port;
searching a mapping table to determine whether one or more field values of the downstream packet correspond to any LLIDs or ports; and
if the one or more field values correspond to an LLID, assigning the LLID to the downstream packet and transmitting the downstream packet to a remote node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An apparatus for forwarding packets in an Ethernet passive optical network (EPON), comprising a central node and at least one remote node;
- wherein the central node is configured to;
assign a logical link identifier (LLID) to a remote node, wherein an LLID corresponds to a logical link between the central node and a remote node, associate an LLID with a port of a switch within the central node, wherein the switch has a number of ports;
wherein a port may be a physical port or a virtual port; and
wherein the number of ports on the switch are divided into network-side ports and user-side ports;
receive a downstream packet from a network-side port;
search a mapping table to determine whether one or more field values of the downstream packet correspond to any LLIDs or ports; and
if the one or more field values correspond to an LLID, to assign the LLID to the downstream packet and to transmit the downstream packet to a remote node. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
- wherein the central node is configured to;
Specification