The invention provides a new cost-effective and efficient framework for network management of telecommunications networks by monitoring the network-level concepts of routes and paths. The invention is embodied in a route and path management (RPM) system which includes a data collector for collecting
The invention provides a new cost-effective and efficient framework for network management of telecommunications networks by monitoring the network-level concepts of routes and paths. The invention is embodied in a route and path management (RPM) system which includes a data collector for collecting data from the individual network elements, a management server for processing the routing data collected into manageable route and path objects and a graphical unit interface (GUI) for allowing a user to manage and monitor routes and paths in the IP network. By monitoring routes and paths, the RPM provides network managers with the added capability of troubleshooting, performance monitoring, service level planning and provisioning packet forwarding paths between any source-destination endpoints in a network.
대표청구항▼
The invention provides a new cost-effective and efficient framework for network management of telecommunications networks by monitoring the network-level concepts of routes and paths. The invention is embodied in a route and path management (RPM) system which includes a data collector for collecting
The invention provides a new cost-effective and efficient framework for network management of telecommunications networks by monitoring the network-level concepts of routes and paths. The invention is embodied in a route and path management (RPM) system which includes a data collector for collecting data from the individual network elements, a management server for processing the routing data collected into manageable route and path objects and a graphical unit interface (GUI) for allowing a user to manage and monitor routes and paths in the IP network. By monitoring routes and paths, the RPM provides network managers with the added capability of troubleshooting, performance monitoring, service level planning and provisioning packet forwarding paths between any source-destination endpoints in a network. e buffer occupied by messages received over the at least one virtual circuit exceeds a selected virtual circuit flow control threshold level, and (ii) generate a set link flow control message for transmission over the communication link when the portion of the buffer occupied by messages exceeds a selected link flow control threshold level; and B the network interface of the source device including a transmit section configured to transmit messages over the at least one virtual circuit, and a source flow control circuit configured to (i) in response to receipt by the source device of the set virtual circuit flow control message associated with the at least one virtual circuit, disable the transmit section from transmitting messages over the at least one virtual circuit, and (ii) in response to receipt by the source device of the set link flow control message over the communication link connected thereto, disable the transmit section from transmitting messages over the communication link. 2. A system as defined in claim 1 in which the network includes a switching node which is configured to form part of a path for the at least one virtual circuit, the switching node being connected to receive messages transmitted by the source device over the at least one virtual circuit over one communication link connected to said switching node, buffer the received messages in an internal buffer, and transmit the buffered messages theat were received over the at least one virtual circuit over another communication link connected to said switching node thereby to forward messages for the at least one virtual circuit downstream over the at least one virtual circuit, the switching node further being configured to, if the occupancy of the switching node's buffer by messages from the at least one virtual circuit exceeds a selected virtual circuit threshold level, generate and transmit a virtual circuit flow control message over the one communication link, thereby to forward the virtual circuit flow control message upstream over the virtual circuit to disable the source device for that virtual circuit from transmitting messages thereover. 3. A system as defined in claim 2 in which the switching node is further configured to, if the occupancy of the its buffer exceeds a selected switching node link threshold level, generate and transmit link flow control messages over a plurality of the communication links connected thereto over which it receives messages. 4. A system as defined in claim 1 in which the destination flow control circuit is further configured to generate the set virtual circuit flow control message in further response to the portion of the buffer occupied by messages received over all virtual circuits. 5. A system as defined in claim 4 in which the destination flow control circuit is further configured to generate a clear virtual circuit flow control message associated with the at least one virtual circuit, the source flow control circuit being further configured to enable the transmit section to thereafter transmit messages over the at least one virtual circuit. 6. A system as defined in claim 5 in which the destination flow control circuit is configured to generate the clear virtual circuit flow control circuit for the at least one virtual circuit in relation to the portion of the buffer occupied by messages received over all virtual circuits and the portion of the buffer occupied by messages received over the at least one virtual circuit. 7. A system as defined in claim 1 in which the destination flow control circuit is further configured to generate a clear link flow control message for transmission over the communication link, after it has generated a set link flow control message, when the portion of the buffer occupied by messages falls below the selected link flow control threshold level by a predetermined amount. 8. A network interface for use in a destination device configured to receive messages over a communication link , each message being associated with a virtual circuit, the network interface comprising: A. a buffer configured to buffer messages received over virtual circuit; and B. a destination flow control circuit being configured to (i) generate a set virtual circuit flow control message associated with the virtual circuit for transfer over the communication link to the source device when a portion of the buffer occupied by messages received over the virtual circuit exceeds a selected virtual circuit flow control threshold level, and (ii) generate a set link flow control message for transmission over the communication link when the portion of the buffer occupied by messages exceeds a selected link flow control threshold level. 9. A network interface as defined in claim 8 in which the destination flow control circuit is further configured to generate the set virtual circuit flow control message in further response to the portion of the buffer occupied by messages received over all virtual circuits. 10. A network interface as defined in claim 9 in which the destination flow control circuit is further configured to generate a clear virtual circuit flow control message associated with the at least one virtual circuit, the source flow control circuit being further configured to enable the transmit section to thereafter transmit messages over the at least one virtual circuit. 11. A network interface as defined in claim 10 in which the destination flow control circuit is configured to generate the clear virtual circuit flow control circuit for the at least one virtual circuit in relation to the portion of the buffer occupied by messages received over all virtual circuits and the portion of the buffer occupied by messages received over the at least one virtual circuit. 12. A network interface as defined in claim 8 in which the destination flow control circuit is further configured to generate a clear link flow control message for transmission over the communication link, after it has generated a set link flow control message, when the portion of the buffer occupied by messages falls below the selected link flow control threshold level by a predetermined amount. 13. A network interface for use in a source device configured to transmit messages over a communication link, each message being associated with a virtual circuit, the network interface comprising: A. a transmit section configured to transmit messages over the virtual circuit; and B. a source flow control circuit configured to (i) in response to receipt by the source device of a set virtual circuit flow control message associated with the virtual circuit, disable the transmit section from transmitting messages over the virtual circuit, and (ii) in response to receipt by the source device of a set link flow control message over the communication link connected thereto, disable the transmit section from transmitting messages over the communication link. 14. A switching node for use in connection with a network, the switching node forming part of a path for a virtual circuit between a source device and a destination device, the switching node comprising: A. a message receiver configured to receive messages transmitted by the source device over the virtual circuit for which the switching node forms part of the path over one communication link connected thereto, B. an internal buffer configured to buffer received messages received by the message receiver; C. a message transmitter configured to transmit the buffered messages over the virtual circuit over another communication link connected thereto, thereby to forward messages for the virtual circuit downstream over the virtual circuit; and D. a virtual circuit flow control message generator configured to, if the occupancy of the switching node's buffer by messages from a particular virtual circuit exceeds a selected virtual circuit threshold level, generate and enabled to be transmitted a virtual circuit flow control messa ge over the one communication link, thereby to forward the virtual circuit flow control message upstream over the virtual circuit to disable the source device for that virtual circuit from transmitting messages thereover. 15. A switching node as defined in claim 14 further including a link flow control message generator configured to, if the occupancy of the buffer exceeds a selected switching node link threshold level, generate and enable to be transmitted link flow control messages over a plurality of the communication links connected thereto over which it receives messages. 16. A method of operating a system comprising at least two devices interconnected by a network including at least one communication link, each device including a network interface for transferring messages over the network, at least one of the devices as a source device, transmitting messages over at least one virtual circuit established over the network, and at least one other of the devices, as a destination device, receiving the messages over the at least one virtual circuit, the method comprising the steps of A. in connection with the network interface of the destination device (i) buffering messages received over the at least one virtual circuit in a buffer (ii) generating a set virtual circuit flow control message associated with the virtual circuit for transfer over the communication link to the source device when a portion of the buffer occupied by messages received over the at least one virtual circuit exceeds a selected virtual circuit flow control threshold level, and (ii) generating a set link flow control message for transmission over the communication link when the portion of the buffer occupied by messages exceeds a selected link flow control threshold level; and B. in connection with the network interface of the source device (i) normally transmitting messages over the at least one virtual circuit, (ii) in response to receipt by the source device of the set virtual circuit flow control message associated with the at least one virtual circuit, disabling transmission of messages over the at least one virtual circuit, and (iii) in response to receipt by the source device of the set link flow control message over the communication link connected thereto, disable transmission of messages over the communication link. 17. A method as defined in claim 16, the network further including a switching node which forms part of a path for the at least one virtual circuit, the method including the steps of, in connection with the switching node, A. receiving messages transmitted by the source device over the at least one virtual circuit over one communication link connected thereto, B. buffering received messages received by the message receiver in an internal buffer; C. transmitting the buffered messages received over the at least one virtual circuit over another communication link connected thereto, thereby to forward messages for the at least one virtual circuit downstream over the at least one virtual circuit; and D. if the occupancy of the switching node's buffer by messages received over the at least one virtual circuit exceeds a selected virtual circuit threshold level, generating and enabling to be transmitted a virtual circuit flow control message over the one communication link, thereby to forward the virtual circuit flow control message upstream over the virtual circuit to disable the source device for that virtual circuit from transmitting messages thereover. 18. A method as defined in claim 17 further including a link flow control message generation step of enabling the switching node to, if the occupancy of the buffer exceeds a selected switching node link threshold level, transmit link flow control messages over a plurality of the communication links connected thereto over which it receives messages. 19. A method as defined in claim 16 in which the set virtual circuit flow control message is further generated in r
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