System and method for detecting failures and re-routing connections in a communication network
First Claim
1. A method of re-establishing a connection for a communication link, said communication link having a first portion in a first ATM communication network, a second portion in a second MPLS communication network and an interface connecting said first portion to said second portion, said first ATM communication network having a first communication protocol and a first OAM protocol adapted to monitor integrity of said first portion, said second MPLS communication network having a second communication protocol and a second MPLS OAM protocol adapted to monitor integrity of said second portion, said method comprising:
- utilizing said second MPLS OAM protocol to detect a failure relating to a label switched path (LSP) tunnel in said second portion by monitoring connectivity verification (CV) frames of said second MPLS OAM protocol being passed over said LSP tunnel;
upon detection of said failure, identifying an alternate route for said second portion in said second MPLS communication network, said alternate route being able to complete said second portion of said communication link from said interface; and
for said communication link, at said interface replacing said second portion with said alternate route.
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Accused Products
Abstract
A method of re-establishing a connection for a communication link is provided. The link has first and second portions, having the first portion in a first communication network, the second in a second communication network and an interface connecting first portion to the portion. The first communication network has a first communication protocol and a first OAM protocol to monitor integrity of the first portion. Similarly, the second communication network has a second communication protocol and a second OAM protocol. The method utilizes the second OAM protocol to detect a failure in the second portion. Upon detection of the failure, an alternate route for the second portion in the second communication network is identified, where the alternate route is able to complete the second portion of the communication link from the interface. For the communication link, at the interface the second portion is replaced with the alternate route.
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Citations
12 Claims
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1. A method of re-establishing a connection for a communication link, said communication link having a first portion in a first ATM communication network, a second portion in a second MPLS communication network and an interface connecting said first portion to said second portion, said first ATM communication network having a first communication protocol and a first OAM protocol adapted to monitor integrity of said first portion, said second MPLS communication network having a second communication protocol and a second MPLS OAM protocol adapted to monitor integrity of said second portion, said method comprising:
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utilizing said second MPLS OAM protocol to detect a failure relating to a label switched path (LSP) tunnel in said second portion by monitoring connectivity verification (CV) frames of said second MPLS OAM protocol being passed over said LSP tunnel; upon detection of said failure, identifying an alternate route for said second portion in said second MPLS communication network, said alternate route being able to complete said second portion of said communication link from said interface; and for said communication link, at said interface replacing said second portion with said alternate route. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A network node associated with a first ATM communication network and a second MPLS communication network, said network node processing communications for a communication link having a first portion in said first ATM communication network, a second portion in said second MPLS communication network and an interface between said first portion and said second portion at said network node, said first ATM communication network having a first communication protocol and a first OAM protocol adapted to monitor integrity of said first portion, said second MPLS communication network having a second communication protocol and a second MPLS OAM protocol adapted to monitor integrity of said second portion, said network node comprising:
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a first module adapted to detect a failure relating to a label switched path (LSP) tunnel in said second portion utilizing said second MPLS OAM protocol by monitoring connectivity verification (CV) frames of said second MPLS OAM protocol being passed over said LSP tunnel; a second module adapted to receive an indication of said failure and upon receipt of said indication, to identify an alternate route for said second portion in said second MPLS communication network, said alternate route being able to complete said second portion of said communication link from said interface; and a third module adapted to receive an indication of said alternate route and to replace said second portion with said alternate route for said communication link. - View Dependent Claims (9, 10, 11, 12)
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Specification