AT&T Intellectual Property I, LP

Sbc Properties, L.p.

Teong Yee Tan

Yongdong Zhao

Shih-Chung Tom Soon

Shih Chung Soon

Holly Chen

Bei Zhou

Geethakumari P M Nair

Larry Katzeff

Michael F Martincello

Wengo Chen

A system and method for routing data, the system having a processor, an interface in communication with the processor and capable of being in communication with a second system for routing data, a memory unit in communication with the processor, the memory unit having a network routing table having a plurality of routes, the plurality of routes having a first route; and a network failure route selection logic including instructions adapted to configure the processor to determine when the first route is inoperative, transmit a first data packet to the second system for routing data when the first route is inoperative and utilize a second route selected from one of the plurality of routes, the second route being different from the first route.

System and method to achieve sub-second routing performance

Systems and methods for testing an implementation of a routing protocol in a device are disclosed. Generally, a sequence of protocol messages is provided and a test is performed to test how a device reacts to a specific playback rate for the sequence of protocol messages, wherein the specific playback rate causes a protocol state transition in the device which differs from an expected protocol state transition absent a specific playback delay.

Controlled exception-based routing protocol validation

A frame relay data rate Rfor a VoIP call is determined based on a particular packetization time interval Tand its associated sample data size Bfor a particular CODEC, a size Bof at least one of a frame relay header and a frame relay trailer, and a size Bof an IP header. A number of VoIP calls NUMthat can be supported by a frame relay access link is determined based on a bandwidth of the frame relay access link that is to be allocated to VoIP traffic, and the frame relay data rate R. At least one network parameter is determined based on NUM. Bandwidth in an asynchronous transfer mode (ATM) network is allocated for the VoIP traffic based on the at least one network parameter.

Bandwidth allocation for VoIP traffic in network having interface between frame relay and ATM

An implementation of a routing protocol in a device is tested by testing how the device reacts to messages and message sequences having potentially adverse conditions. Examples include messages either having a specified message size which is intentionally out-of-conformance with the routing protocol, having a repeated protocol field, absent a mandatory protocol field, or having an incorrect order of protocol fields. Examples also include message sequences having either a specific playback delay between at least one pair of adjacent protocol messages in the first sequence of protocol messages, a specific playback rate for the second sequence of protocol messages, or a modified message order.

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Pleasanton, CA, United States of America

Teong Yee Tan