Nortel Networks Corporation

Rockstar Consortium US LP

Rpx Clearinghouse LLC

Prx Clearinghouse LLC

Haldon Sandick

Matthew B Squire

Kedarnath Poduri

Bradley Cain

Ian Hamish Duncan

Brian Haberman

A method and apparatus for quickly determining the status of a network device in a network communicates status inquiry messages over the forwarding plane of one network device to at least one neighboring network device. The status inquiry messages indicate the connectivity status with at least one neighboring network device.

Method and apparatus for the fast detection of connectivity loss between devices in a network

A method and apparatus for quickly determining the status of a network device in a network communicates status inquiry messages over the forwarding plane of one network devise to at least one neighboring network device. The status inquiry messages indicate the connectivity status with at least one neighboring network device.

An autoconfiguring data router is connected to a communications network subnet having a second network data router. The autoconfiguring data router includes a configuration determination module that determines configuration attributes for operably connecting the autoconfiguring data router to the subnet, and an autoconfiguration module that configures the autoconfiguring data router according to the configuration attributes so that the autoconfiguring data router is operably connected to the subnet.

Methods for auto-configuring a router on an IP subnet

A method and apparatus for quickly determining the status of a network device in a network communicates status inquiry messages over the forwarding plane of one network device to at least one neighboring network device. The status inquiry messages indicate the connectivity status with at least one neighboring device. The status inquiry messages are transmitted periodically to the at least one neighboring device. In addition, the network device may communicate an advertisement message over the control plane to discover the at least one neighboring network device prior to the communication of the status inquiry messages over the forwarding plane. The network devices may negotiate communication parameters for the exchange of status inquiry messages with the at least one network device.

Routing information is distributed interdomain using a policy-based protocol and intradomain by flooding. A network device receives a message with routing information from outside its domain and applies policy. Policy filtered routing information is flooded throughout the domain of the network device. A link state advertisement header is added to the routing information to perform flooding. Policy is also applied to flooded routing information before sending such message to another domain.

Apparatus and method of distributing routing information

An apparatus and method of configuring a first network device that is a part of a subnet ascertains configuration data from packets in a subnet having configuration dat. More particularly, the packets, which are transmitted by a second network device in the subnet, first are retrieved and then parsed to ascertain the configuration data. At least a portion of the configuration data is stored in a configuration database. In addition, at least one datum from the configuration data is processed to produce additional configuration data that also is stored in the configuration database. The first network device consequently operates in accord with the data in the configuration database.

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Durham, NC, United States of America

Haldon Sandick