Tellabs San Jose, Inc.

Brocade Communications Systems, Inc.

Brocade Communication Systems LLC

3com Corporation

Tellabs Operations, Inc.

Pmc-sierra (maryland), Inc.

Vivace Networks, Inc.

Mitri Halabi

Ken Koenig

Vinai Sirkay

Michael Kazban

Pankaj K Jha

Vivek Agarwal

Ram Dular Singh

Adam Julian Goldstein

Yuen Fai Wong

Mohammad Kamel Issa

Mark David Griswold

Amir Lehavot

Raghavan Menon

Robert Colvin

Shaham Parvin

Ananda Rajagopal

Xiaoyang Zheng

Frank S Yang

Brian D Holden

Darren S Braun

Kenneth C Hsu

Techniques for provisioning single or multistage networks using Ethernet Service Instances (ESIs). In one embodiment, an ESI is a logical entity or object that stores information that may be used to provision a network. An ESI may represent a logical entity that identifies a grouping of elements of a network or network device and associated attributes. Hierarchical relationships may be created between ESIs. The hierarchical relationships are used to perform packet-level processing including performing network packet encapsulations.

Provisioning single or multistage networks using ethernet service instances (ESIs)

Service providers can reduce multiple overlay networks by creating multiple logical service networks (LSNs) on the same physical or optical fiber network through use of an embodiment of the invention. The LSNs are established by the service provider and can be characterized by traffic type, bandwidth, delay, hop count, guaranteed information rates, and/or restoration priorities. Once established, the LSNs allow the service provider to deliver a variety of services to customers depending on a variety of factors, for example, a customer's traffic specifications. Different traffic specifications are serviced on different LSNs depending on each LSN's characteristics. Such LSNs, once built within a broadband network, can be customized and have its services sold to multiple customers.

Apparatus and methods for establishing virtual private networks in a broadband network

A system is provided for facilitating assignment of a virtual routing node identifier to a non-routing node. During operation, the system assigns to a non-routing node coupled to a switch a virtual routing node identifier unique to the non-routing node. In addition, the system communicates reachability information corresponding to the virtual routing node identifier to other switches in the network.

Method and system for extending routing domain to non-routing end stations

Congestion control techniques based upon resource utilization information stored by a network device. According to an embodiment of the present invention, a network device is configured to identify a data source causing congestion based upon information stored by the network device identifying a set of data sources, and for each data source, information identifying the amount of a resource of the network device being used for processing data received by the network device from the data source.

Source-based congestion detection and control

Embodiments of the present invention relate to portions of a switch fabric having a single logical stage and at least one physical stage. In addition, the data paths and the control paths of the switch fabric can be decoupled thereby allowing additional processing to be performed than would otherwise be the case with control rates that matched the high data rates. In other words, data cells received on high speed links can be spread over many lower speed links; consequently, the data cells can transit the switch fabric at that high speed while the control information associated with the data can be processed at that lower speed. Because the control information can be processed at a lower speed (associated with the control path), the control information can be processed over a greater period of time.

Apparatus and method for a fault-tolerant scalable switch fabric with quality-of-service (QOS) support

Service providers can reduce multiple overlay networks by creating multiple logical service networks (LSNS) on the same physical or optical fiber network. The LSNs are established by the service provider and can be characterized by traffic type, bandwidth, delay, hop count, guaranteed information rates and/or restoration priorities. Once established, the LSNs allow the service provider to deliver a variety of services to customers depending on customer's traffic specifications. Different traffic specifications are serviced on different LSNS, depending on each LSN's characteristics. Such LSNS, once built within a broadband network, can be customized and sold to multiple customers.

Service providers can reduce multiple overlay networks by creating multiple logical service networks (LSNs) on the same physical or optical fiber network. The LSNs are established by the service provider and can be characterized by traffic type, bandwidth, delay, hop count, guaranteed information rates and/or restoration priorities. Once established, the LSNs allow the service provider to deliver a variety of services to customers depending on customer's traffic specifications. Different traffic specifications are serviced on different LSNs, depending on each LSN's characteristics. Such LSNs, once built within a broadband network, can be customized and sold to multiple customers.

An exemplary method for circuit emulation over a multi-packet label switching (MPLS) network comprises the steps of receiving a time division multiplexed data stream at an ingress end, dividing the data stream into a set of fixed sized packets, adding a service header to each of the packets, adding an additional header on top of the service header in accordance with MPLS protocols, removing the additional header after each packet has been processed by the MPLS network, and using the service header to recover the data stream at an egress end.

Apparatus and methods for circuit emulation of a point-to-point protocol operating over a multi-packet label switching network

An UTOPIA level 2 interface over a backplane for connecting up to 31 Physical layer devices to one ATM layer device in a logically partitioned manner utilizing full bandwidth. The communications data is received on a first terminal at a first transfer rate. The communications data transfer rate is reduced from the first transfer rate to a second transfer rate. At the second transfer rate, the communications data is transferred over a backplane to a second terminal. On the second terminal, communications data transfer rate is increased from the second transfer rate to the first transfer rate. The first transfer rate is greater than the second transfer rate.

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San Jose, CA, United States of America

Mitri Halabi