Brocade Communications Systems, Inc.

Tellabs San Jose, Inc.

Avago Technologies International Sales Pte. Limited

Coriant Operations, Inc.

Lisa Hong Nguyen

Mohammad Hanif

Yung-Ching Tseng

Annie A Dang

Mahidas Prabhanjan

Malyadri Jaladanki

Minjie Dai

Samer Isam Nubani

Man-Tung T Hsiao

Dilip Kumar

Sundeep Kumar Singh

Vijay Kumar Vasantha

Rajiv Goel

Albert Fong

David Tseng

One embodiment of the present invention provides a switch. The switch includes a network-virtualization module, an update module, an acknowledgment module, and an election module. During operation, the network-virtualization module establishes a forwarding segment for an end device multi-homed with the switch and a second switch. The forwarding segment can be identified by a segment identifier persistent in the switch and the second switch. The update module constructs, for the second switch, a first route update message comprising an indicator value for the forwarding segment. The acknowledgment determines the indictor value in a second route update message from the second switch as an acknowledgment for the first route update message. If the switch receives the acknowledgment from a respective switch participating in the forwarding segment, the election module initiates a designated forwarder election for the forwarding segment. The designated forwarder is responsible for forwarding multi-destination traffic in the forwarding segment.

Multi-destination packet forwarding for a multi-homed device in a virtual network

Techniques for reducing the latency in performing a failover from a protected connection to its backup connection when a network event is detected affecting the protected connection. In an MPLS network, techniques are provided for failing a protected LSP to a backup LSP in a fast and efficient manner. In one embodiment, the faster failover is facilitated by storing protected LSPs and their backup LSPs information in the data plane, such as locally on a linecard.

Techniques for performing a failover from a protected connection to a backup connection

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

A method for reporting events relating to objects of a network element manageable by a network management device, using a network management protocol, and devices, a network, and computer-readable storage medium storing control logic, that operate in accordance with the method. Events for each object are detected, event information is generated for detected events, generated event information for multiple events is packaged into a trap message for each object type, the trap message is communicated from the network element to the network management device, and the event information from the communicated trap message is unpacked at the network management device. In this manner, network congestion and processor overload at the network management device can be reduced.

Reporting multiple events in a trap message

Techniques for dynamically establishing and configuring a liveliness detection session for a local repair connection of a connection. In one set of embodiments, a signaling message is received at a node configured to maintain a local repair connection for a connection. A configuration parameter is identified in the signaling message, where the configuration parameter pertains to a liveliness detection mechanism or protocol. A liveliness detection session is then established for the local repair connection based on the configuration parameter.

Dynamic configuration of liveliness detection

A method or apparatus in an exemplary embodiment supports first and second layer network nodes that may be configured to communicate with each other via a communications path. In embodiments a first network node communicates via a second network node across a layer 2 network to send data. The first network node is typically on a different link layer protocol than the second network node receiving the data. Thus, the first and second layer network nodes, having different link layer protocols, may communicate with each other. Accordingly, through use of embodiments of this invention, Neighbor Discovery (ND) is possible in a network, such as an IPv6 network, that has protocols incompatible with each other.

Method and apparatus for neighborhood discovery across disparate point-to-point networks

Growing community of inventors

San Jose, CA, United States of America

Lisa Hong Nguyen