Apparatus and method for multihop MPLS/IP/ATM/frame relay/ethernet pseudo-wire
First Claim
Patent Images
1. An apparatus for emulating a layer-2 service over at least one network, the apparatus comprising:
- a signal transmission path;
two provider edge devices located at opposite ends of said signal transmission path; and
a provider device located along said signal transmission path such that said provider device divides said signal transmission path into segments, wherein one of said provider edge devices includes code for adding a demultiplexing header onto data units prior to said data units being transmitted along said signal transmission path.
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Abstract
An apparatus for emulating a layer-2 service over at least one network is disclosed. The apparatus includes a signal transmission path. Two provider edge devices are located at opposite ends of the signal transmission path. A provider device is located along the signal transmission path, and this provider device divides the signal transmission path into segments. One of the provider edge devices includes code for adding a demultiplexing header onto data units prior to the data units being transmitted along the signal transmission path.
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Citations
20 Claims
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1. An apparatus for emulating a layer-2 service over at least one network, the apparatus comprising:
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a signal transmission path;
two provider edge devices located at opposite ends of said signal transmission path; and
a provider device located along said signal transmission path such that said provider device divides said signal transmission path into segments, wherein one of said provider edge devices includes code for adding a demultiplexing header onto data units prior to said data units being transmitted along said signal transmission path. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for emulating a layer-2 service over at least one network, the method comprising the steps of:
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receiving a data unit at a first provider edge device;
adding a demultiplexing header onto said data unit;
transporting said data unit along a signal transmission path, said signal transmission path being divided into at least two segments by at least one provider device;
receiving a data unit at a second provider edge device;
demultiplexing said data unit; and
transmitting said data unit out of said second provider edge device, wherein there is a service emulation over at least one of said at least two segments. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A network system for emulating a layer-2 service, comprising:
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a signal transmission path having two ends;
a first provider edge device including means for adding a demultiplexing header onto data units prior to said data units being transmitted along said signal transmission path, said first provider edge device being located at a first end of said signal transmission path;
a second provider edge device being located at the opposite end of said signal transmission path;
means for automatically discovering said signal transmission path; and
a node located along said signal transmission path such that said node divides said signal transmission path into segments, wherein local switching occurs at said node. - View Dependent Claims (17, 18, 19, 20)
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Specification