Bandwidth management for MPLS fast rerouting
AssigneeAT&T Intellectual Property II, L.P.
InventorsGuangzhi Li, Dongmei Wang
Life of this patent
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Abstract
Certain exemplary embodiments provide a method comprising: in a network at a node located on a label switched path: selecting a backup path to respond to a failure; and for each link along the backup path, reserving a backup bandwidth, wherein the backup bandwidth is sufficient to reroute traffic around the failure.
Claims20
A system communicatively linked to a network comprising a plurality of link-coupled nodes at a non-terminal node located on a label switched path of a plurality of label switched paths in the network, the system comprising:
- a memory that stores instructions;
- a processor that executes the instructions to perform operations comprising:
- selecting an optimized backup path for rerouting traffic around a failure located downstream of the non-terminal node, wherein the failure is one of a plurality of possible failures on the plurality of label switched paths;
- reserving a backup bandwidth for each predetermined link of a plurality of predetermined links along the optimized backup path, wherein the backup bandwidth is determined by a value corresponding to a bandwidth associated with a particular failure of the plurality of possible failures;
- updating the value of the backup bandwidth;
- and
- adjusting a bandwidth associated with the optimized backup path to a previously stored value of a bandwidth associated with a link on the optimized backup path.
A method for use in a network comprising a plurality of link-coupled nodes at a non-terminal node located on a label switched path of a plurality of label switched paths in the network, the method comprising:
- selecting an optimized backup path for rerouting traffic around a failure located immediately downstream of the non-terminal node;
- reserving a backup bandwidth for each predetermined link of a plurality of predetermined links along the optimized backup path, wherein the backup bandwidth is determined by a value corresponding to a bandwidth associated with a particular failure of a plurality of possible failures;
- updating the value of the backup bandwidth;
- and
- adjusting, by utilizing instructions from memory that are executed by a processor, a bandwidth associated with the optimized backup path to a previously stored value of a bandwidth associated with a link on the optimized backup path.
A machine-readable device coupled to a network comprising a plurality of link-coupled nodes at a non-terminal node located on a label switched path of a plurality of label switched paths in the network, the machine readable device comprising instructions, which when loaded and executed by a processor, cause the processor to perform operations comprising:
- selecting an optimized backup path for rerouting traffic around a failure located immediately downstream of the non-terminal node;
- reserving a backup bandwidth for each predetermined link of a plurality of predetermined links along the optimized backup, wherein the backup bandwidth is determined by a value corresponding to a bandwidth associated with a particular failure of a plurality of possible failures;
- updating the value of the backup bandwidth;
- and
- adjusting a bandwidth associated with the optimized backup path to a previously stored value of a bandwidth associated with a link on the optimized backup path.
Dependencies are inferred from the claim text.