Network traffic demotion
AssigneeCisco Technology, Inc.
InventorsJohn Evans, Francois Le Faucheur, Clarence Filsfils
Life of this patent
Estimating the term…
Abstract
A method and apparatus for demoting network traffic are disclosed. In one embodiment, a method includes transmitting traffic associated with a session over a first path, and maintaining state information identifying the first path as a forwarding path for the session. Traffic associated with the session is rerouted from the first path to a second path following a network failure and the rerouted traffic is marked so that at least a portion of the rerouted traffic can be dropped at any point in the network if rerouting causes network congestion.
Claims18
A method for demoting traffic in a network, comprising:
- transmitting at a network device, traffic associated with a session over a first path and maintaining state information identifying said first path as a forwarding path for said session, said session comprising a voice call;
- rerouting traffic received at the network device and associated with said session from said first path to a second path following a network failure;
- marking at the network device, the rerouted traffic so that at least a portion of the rerouted traffic can be dropped at a node in the network if said rerouting of the traffic causes network congestion;
- and
- applying call admission control to said voice call to admit said voice call to said second path and stopping said marking of the rerouted traffic.
An apparatus configured for receiving traffic associated with a session and transmitting the traffic over a first path, the apparatus comprising:
- memory for storing state information identifying said first path as a forwarding path for said session;
- a controller operable to reroute the traffic associated with said session from said first path to a second path following a network failure;
- and
- a traffic demoter configured to mark the rerouted traffic so that at least a portion of the rerouted traffic can be dropped if rerouting of the traffic causes network congestion;
- wherein said session is a voice call and said traffic demoter is configured to stop marking the rerouted traffic after applying call admission control to said voice call.
An apparatus for demoting traffic in a network, comprising:
- a processor;
- and
- a computer readable storage device that stores instructions for execution by the processor and when executed operable to:
- transmit traffic associated with a session over a first path and maintaining state information identifying said first path as a forwarding path for said session, said session comprising a voice call;
- reroute traffic received at the apparatus and associated with said session from said first path to a second path following a network failure;
- mark the rerouted traffic so that at least a portion of the rerouted traffic can be dropped at a node in the network if rerouting of the traffic causes network congestion;
- and
- apply call admission control to said voice call to admit said voice call to said second path and stop said marking of the rerouted traffic.
Dependencies are inferred from the claim text.