3com Corporation

Arcady Chernyak

Haim Rochberger

Sarit Shani Natanson

Eldad Bar-Eli

Alexander Or

Miki Kennet

A method of triggering reroutes in an ATM network based on a call optimization value being reduced beyond a predefined threshold. The method utilizes a signaling element in the SETUP message called a PNNI optimization reservation signaling element that includes an optimization type, value and percentage. A switch accumulates the optimization value and passes this value to the next node along the path. In addition, the hardware in the node is configured to measure and monitor the optimization value. The optimization value is monitored for changes that exceed the predefined optimization percentage. When this is detected, the software calculates a reroute. If the new route is better than the current route and is within the optimization percentage constraints, a reroute is performed using the newly calculated route. The reroute procedure provided by the ATM Forum can be used to implement the reroute.

Method of triggering reroutes in an asynchronous transfer mode network

A method for detecting leaks in an ATM network, the method including the steps of a) creating an entity interconnection map including mappings of port interconnections among a plurality of network nodes, the plurality of network nodes includes a plurality of network endpoints and at least one network switch, b) creating an endpoint map including at least one endpoint mapping of at least one port to at least one virtual identifier for at least one of the network endpoints and a leak indicator for the at least one network endpoint indicating that the network endpoint is either of a transmitting endpoint and a receiving endpoint, c) creating a switch map including at least one switch mapping of at least one port and virtual identifier grouping to at least one other port and virtual identifier grouping for the at least one network switch, d) initializing a leak indicator for each of the endpoint mappings and the switch mappings to indicate a leak condition, e) traversing a virtual channel connection from each transmitting endpoint in the endpoint map to a corresponding receiving endpoint in the endpoint map via the switch map, and f) setting each leak indicator for each endpoint mapping and switch mapping traversed along the virtual channel connection to indicate a no-leak condition.

Methods and apparatus for detecting leaks in ATM networks

A system for reducing the memory requirements of an ATM device utilizing one or more temporary code uploads to bring needed portions of application code into the memory of the ATM embedded system on a temporary basis. The present invention functions to divide the code necessary for operation of the ATM device into two categories: (1) application code that is seldom used or code used only once and (2) all other application code. The application code that is seldom used or used only once is removed from the memory of the ATM embedded system and placed in a software storage device external to the system. This serves to significantly reduce the memory requirements of the ATM device, by as much as 40% in come cases depending on the size of the application code portions.

Growing community of inventors

Rosh-Ha′ayin, Israel

Arcady Chernyak