Tellabs San Jose, Inc.

Coriant Operations, Inc.

Man-Tung T Hsiao

Ravindra Sunkad

Balaji Rajagopalan

Rishi Mehta

Vivek Venkatraman

Sanjay Khanna

Lisa Hong Nguyen

Ramkumar Krishnamoorthy

David S Curry

Samer Isam Nubani

Robert Colvin

Yung-Ching Tseng

Paul M Hallinan

Rajiv Goel

A device having circuit bundles and a method of configuring the network device to provide resiliency and protection for network circuits. A circuit bundle provides the ability to group multiple circuits of the same type for resiliency/protection. There is an active virtual circuit that is selected based on a user configured priority value defining priority for carrying circuit traffic. When the active virtual circuit fails, alternative virtual circuits are selected to carry the circuit traffic, again based on user configured priority. Virtual circuits included in the circuit bundle can have different destinations, and include at least multipoint virtual circuits.

Circuit bundle for resiliency/protection of circuits

Differentiated services for network traffic using weighted quality of service is provided. Network traffic is queued into separate per flow queues, and traffic is scheduled from the per flow queues into a group queue. Congestion management is performed on traffic in the group queue. Traffic is marked with priority values, and congestion management is performed based on the priority values. For example, traffic can be marked as 'in contract' if it is within a contractual limit, and marked as 'out of contract' if it is not within the contractual limit. Marking can also include classifying incoming traffic based on Differentiated Service Code Point. Higher priority traffic can be scheduled from the per flow queues in a strict priority over lower priority traffic. The lower priority traffic can be scheduled in a round robin manner.

Differentiated services using weighted quality of service (QoS)

A method or corresponding apparatus in an exemplary embodiment of the present invention monitors an operational status of network links and retrieves or receives the operational status. The operational status is stored (e.g., within 50 msec) on an ongoing basis. The operational status corresponds to an operational LSP from among a primary LSP and secondary LSP(s) used to service traffic via the network links to maintain network connectivity via the LSPs. The secondary LSP(s) may be either a bypass LSP or a backup LSP, where each LSP is Fast Re-route (FRR) enabled. Further, correspondence between the primary LSP, secondary LSP(s), and the network links may be tracked. In order to deliver network traffic via the operational LSP known to service traffic between the source and destination, a link identifier may be used. The link identifier is determined from the source and destination information within the network traffic.

Method and apparatus for maintaining network connectivity via label switched path(s)

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Cupertino, CA, United States of America

Man-Tung T Hsiao