Router, frame forwarding method, and lower layer frame virtual forwarding system
First Claim
1. A router in a virtual network being able to forward a lower layer frame including a protocol identifier for identifying duplication or non-duplication and a label switch frame having a hierarchical path identifier on the basis of the hierarchical path identifier, said router comprising:
- a determining unit for determining whether a received lower layer frame or a received label switch frame is to be duplicated or not on the basis of a protocol identifier of the received lower layer frame or the received label switch frame; and
a forwarding process unit for giving at least any one of a hierarchical path identifier for unicast, a hierarchical path identifier for multicast and a user identifier to the received lower layer frame or the received label switch frame determined to be duplicated by said determining unit, and forwarding the frame.
1 Assignment
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Accused Products
Abstract
In an MPLS network, multicast, broadcast and address learning belonging to the layer 2 functions are realized. An ingress router comprises a frame receiving unit, a determining unit, a first frame transmitting unit, a physical address table for multicast, a label switching unit, a tunnel label table, a VCID giving unit, a L2 header creating unit and a second frame transmitting unit. The load on the network is suppressed, the band is efficiently used, and wasteful frame duplication and frame forwarding between edge routers are avoided.
298 Citations
14 Claims
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1. A router in a virtual network being able to forward a lower layer frame including a protocol identifier for identifying duplication or non-duplication and a label switch frame having a hierarchical path identifier on the basis of the hierarchical path identifier, said router comprising:
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a determining unit for determining whether a received lower layer frame or a received label switch frame is to be duplicated or not on the basis of a protocol identifier of the received lower layer frame or the received label switch frame; and
a forwarding process unit for giving at least any one of a hierarchical path identifier for unicast, a hierarchical path identifier for multicast and a user identifier to the received lower layer frame or the received label switch frame determined to be duplicated by said determining unit, and forwarding the frame. - View Dependent Claims (2, 3, 4, 14)
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5. A frame forwarding method in a virtual network being able to forward a lower layer frame including a protocol identifier for identifying duplication or non-duplication and a label switch frame having a hierarchical path identifier on the basis of the hierarchical path identifier, said frame forwarding method comprising:
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a determining step of determining, by an ingress edge router pushing the label switch frame obtained by giving the hierarchical path identifier to an external lower layer frame from the outside of said virtual network to said virtual network, whether a received layer lower frame or a received label switch frame is to be duplicated on the basis of a protocol identifier of the received lower layer frame or the received label switch frame;
a forwarding process step of passing, by said ingress edge router, the received lower layer frame or the received label switch frame determined not to be duplicated at said determining step, while giving at least any one of a hierarchical path identifier for unicast, a hierarchical path identifier for multicast and a user identifier to the received lower layer frame or the received label switch frame determined to be duplicated at said determining step, and forwarding the same; and
a relaying step of duplicating or forwarding, by a relay router forwarding to said virtual network, the received lower layer frame or the received label switch frame forwarded at said forwarding process step on the basis of at least any one of the hierarchical path identifier for unicast, the hierarchical path identifier for multicast and the user identifier. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A lower layer frame virtual forwarding system comprising:
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an ingress edge router for pushing a label switch frame obtained by giving a hierarchical path identifier to an external lower layer frame from the outside of a virtual network, which can transfer a lower layer frame including a protocol identifier for identifying duplication or non-duplication and the label switch frame having the hierarchical path identifier, to said virtual network;
a relay router for forwarding the label switch frame forwarded from said ingress edge router to said virtual network on the basis of the hierarchical path identifier;
an egress edge router for removing the hierarchical path identifier given to the label switch frame forwarded from said relay router, and transmitting the label switch frame to the outside of said virtual network;
each of said ingress edge router, said relay router, and said egress edge router comprising;
a determining unit for determining whether a received lower layer frame or a received label switch frame is to be duplicated or not on the basis of a protocol identifier of the received lower layer frame or the received label switch frame; and
a forwarding process unit for passing the received lower layer frame or the received label switch frame determined not to be duplicated by said determining unit, while giving at least any one of a hierarchical path identifier for unicast, a hierarchical path identifier for multicast and a user identifier to the received lower layer frame or the received label switch frame determined to be duplicated by said determining unit, and forwarding the frame.
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Specification