Method and system for providing voice QoS during network failure
AssigneeCisco Technology, Inc.
InventorsFrancois Le Faucheur, John Evans, Alton Lo
Life of this patent
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Abstract
A method and system for providing QoS in a network after a network failure are disclosed. The network includes at least one primary tunnel and at least one backup tunnel protecting a segment of the primary tunnel. The method includes receiving notification of a failure within the primary tunnel segment and rerouting received packets onto the backup tunnel. The rerouted packets are marked to identify packets affected by the failure and are subject to a different QoS policy than packets that have not been rerouted due to the failure.
Claims25
A method for providing QoS in a network after a network failure, the network comprising at least one primary tunnel and at least one backup tunnel protecting a segment of said primary tunnel, the method comprising:
- receiving notification of a failure within said primary tunnel segment;
- rerouting received packets onto the backup tunnel;
- and
- marking said rerouted packets to identify packets affected by the failure;
- whereby said rerouted packets are subject to a different QoS policy than packets that have not been rerouted due to the failure.
A method for providing QoS in a network after a network failure, the method comprising:
- creating a primary tunnel;
- establishing a backup tunnel protecting a segment of said primary tunnel;
- forwarding packets assigned to said primary tunnel via said backup tunnel in response to failure of said primary tunnel segment;
- identifying packets affected by the failure as demoted packets;
- and
- applying to said demoted packets a different QoS policy than applied to packets that have not been rerouted due to the failure.
A computer program product for providing QoS in a network after a network failure, the computer program product comprising:
- code that creates a primary tunnel;
- code that establishes a backup tunnel protecting a segment of said primary tunnel;
- code that forwards packets assigned to said primary tunnel via said backup tunnel in response to failure of said primary tunnel segment;
- code that identifies packets affected by the failure as demoted packets;
- code that applies to said demoted packets a different QoS policy than applied to packets that have not been rerouted due to the failure;
- and
- a computer-readable medium that holds the codes.
A system for identifying packets rerouted following a failure in a network, the system comprising:
- a network element located in a path of a primary tunnel in the network and a backup tunnel protecting a segment of said primary tunnel, the network element operable to receive notification of a failure within said primary tunnel and route packets received from said primary tunnel to said backup tunnel, and comprising a demotion apparatus configured to mark said rerouted packets to identify packets affected by the failure as demoted packets such that a differentiated QoS policy can be applied to said demoted packets.
Apparatus for providing QoS in a network after a network failure, the network comprising at least one primary tunnel and at least one backup tunnel protecting a segment of said primary tunnel, the apparatus comprising:
- means for receiving notification of a failure within the primary tunnel segment and routing of traffic on the primary tunnel segment to the backup tunnel;
- and
- means for marking rerouted packets to identify packets affected by the failure;
- whereby said rerouted packets are subject to a different QoS policy than packets that have not been rerouted due to the failure.
Dependencies are inferred from the claim text.