Methods and systems to generate and implement a changeover sequence to reconfigure a connection-oriented network

• US 7,958,209 B2
• Filed: 10/30/2007
• Issued: 06/07/2011
• Est. Priority Date: 06/14/2001
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cariden Technologies, Inc. (Cisco Systems, Inc.)
• Inventors: Gous, Alan, Afrakhteh, Arash, Maghbouleh, Arman, Hentz, Andre
• Primary Examiner(s): Nguyen; Thu
• Assistant Examiner(s): Chang; Julian
• Application Number:
  US11/927,956
• Publication Number:
  US 20080056127A1
• Time in Patent Office: 1,316 Days
• Field of Search: None
• US Class Current: 709/221
• CPC Class Codes: H04L 41/0813 characterised by the conditions triggering a change of settings
• CPC Class Codes: H04L 41/0816 the condition being an adaptation, e.g. in response to network events
• CPC Class Codes: H04L 41/0853 by actively collecting configuration information or by backing up configuration information

Abstract

A method to reconfigure a connection-oriented network from an existing configuration to a desired configuration includes generating a sequence of configuration specifications for the connection-oriented network. The sequence specifies a plurality of intermediate configurations between the existing and the desired configurations. The sequence of configuration specifications is implemented within the connection-oriented network by, for each configuration specification, issuing at least one instruction to an element of the connection-oriented network to modify configuration information maintained at the element to thereby instantiate respective configurations. The implementing includes issuing a specific instruction to instantiate a subsequent configuration specification only if an acknowledgment is received that a preceding configuration has been successfully instantiated.

Claims

1. A method to centrally reconfigure a connection-oriented network from an existing configuration to a desired configuration, the method including:

centrally generating a sequence of configuration specifications for the connection-oriented network, the sequence specifying a plurality of intermediate configurations of a plurality of elements of the connection-oriented network, the intermediate configurations being between the existing and the desired configurations, the generation of the sequence of configuration specifications being made prior to commanding any changes to the existing configuration of the network; and

centrally implementing the sequence of configuration specifications within the connection-oriented network by, for each configuration specification, centrally issuing at least one instruction to a plurality of elements of the connection-oriented network to modify configuration information maintained at the plurality of elements to thereby instantiate respective configurations, wherein the implementing includes commanding the plurality of elements to execute specific instructions to instantiate a subsequent configuration specification only if acknowledgments are received from each of the plurality of elements that a preceding configuration has been successfully instantiated, wherein multiple instructions are issued to multiple nodes of the connection-oriented network, the multiple nodes being included within an old route and a new route for a connection in sequential configuration specifications of the sequence of configuration specifications.

2. The method of claim 1 wherein the at least one instruction issued to the plurality of elements of the connection-oriented network is to modify routing information maintained at the plurality of elements of the connection-oriented network.

3. The method of claim 1 wherein the at least one instruction issued to the plurality of elements of the connection-oriented network is to modify bandwidth admission information maintained at the plurality of elements of the connection-oriented network.

4. The method of claim 3 wherein the bandwidth admission information specifies a bandwidth admission level for at least a first connection of the connection-oriented network, and wherein the at least one instruction is issued to at least one node of the plurality of elements of the connection-oriented network, the at least one node constituting a source node for the first connection.

5. The method of claim 4 wherein the bandwidth admission level comprises a predetermined bandwidth level allowed to be admitted into the connection-oriented network from the source node.

6. The method of claim 4 wherein the bandwidth admission level comprises a predetermined estimate of bandwidth required by the first connection.

7. The method of claim 1 wherein, for a portion of the sequence of configuration specifications, each configuration specification differs from a preceding configuration specification in that only a route associated with a specific connection differs.

8. A system to centrally reconfigure a connection-oriented network from an existing configuration to a desired configuration, the system including:

a sequence creation module to centrally generate a sequence of configuration specifications for the connection-oriented network, the sequence specifying a plurality of intermediate configurations of a plurality of elements of the connection-oriented network, the intermediate configurations being between the existing and the desired configurations, the generation of the sequence of configuration specifications being made prior to commanding any changes to the existing configuration of the network; and

a signaling module, coupled to receive the sequence of configuration specifications from the sequence creation module, and to centrally instantiate the sequence of configuration specifications within the connection-oriented network by, for each configuration specification, issuing at least one instruction to a plurality of elements of the connection-oriented network to modify configuration information maintained at the plurality of elements to thereby instantiate a respective configuration, wherein the signaling module is to command the plurality of elements to execute specific instructions to instantiate a subsequent configuration only if acknowledgments are received from each of the plurality of elements at the signaling module that a preceding configuration has been successfully instantiated, wherein multiple instructions are issued to multiple nodes of the connection-oriented network, the multiple nodes being included within an old route and a new route for a connection in sequential configuration specifications of the sequence of configuration specifications.

9. The system of claim 8 wherein the signaling module is to issue the at least one instruction to the plurality of elements of the connection-oriented network to thereby modify routing information maintained at the plurality of elements of the connection-oriented network.

10. The system of claim 8 wherein the signaling module is to issue the at least one instruction to the plurality of elements of the connection-oriented network to thereby modify bandwidth admission information maintained at the plurality of elements of the connection-oriented network.

11. The system of claim 10 wherein the bandwidth admission information specifies a bandwidth admission level for a first connection of the connection-oriented network, and wherein the signaling module is to issue the at least one instruction to at least one node of the plurality of elements of the connection-oriented network, the at least one node constituting a source node for the first connection.

12. The system of claim 11 wherein the bandwidth admission level comprises a predetermined bandwidth level allowed to be admitted into the connection-oriented network from the source node.

13. The system of claim 11 wherein the bandwidth admission level comprises a predetermined estimate of bandwidth required by the first connection.

14. The system of claim 8 wherein, for a portion of the sequence of configuration specifications, each configuration specification differs from a preceding configuration specification in that only a route associated with a specific connection differs.

15. A system to centrally reconfigure a connection-oriented network from an existing configuration to a desired configuration, the system including:

first means for centrally generating a sequence of configuration specifications for the connection-oriented network, the sequence specifying a plurality of intermediate configurations of a plurality of elements of the connection-oriented network, the intermediate configurations being between the existing and the desired configurations, the generation of the sequence of configuration specifications being made prior to commanding any changes to the existing configuration of the network;

second means, coupled to receive the sequence of configuration specifications from the first means, for centrally instantiating the sequence of configuration specifications within the connection-oriented network by, for each configuration specification, issuing at least one instruction to a plurality of elements of the connection-oriented network to modify configuration information maintained at the plurality of elements to thereby instantiate a respective configuration, wherein the second means is for commanding the plurality of elements to execute specific instructions to instantiate a subsequent configuration only if acknowledgments are received from each of the plurality of elements at the signaling module that a preceding configuration has been successfully instantiated, wherein multiple instructions are issued to multiple nodes of the connection-oriented network, the multiple nodes being included within an old route and a new route for a connection in sequential configuration specifications of the sequence of configuration specifications.

16. A non-transitory machine-readable medium for storing a sequence of instructions that, when executed by a machine, cause the machine to:

centrally generate a sequence of configuration specifications for a connection-oriented network, the sequence specifying a plurality of intermediate configurations of a plurality of elements of the connection-oriented network, the intermediate configurations being between the existing and the desired configurations, the generation of the sequence of configuration specifications being made prior to commanding any changes to the existing configuration of the network; and

centrally implement the sequence of configuration specifications within the connection-oriented network by, for each configuration specification, centrally issuing at least one instruction to a plurality of elements of the connection-oriented network to modify configuration information maintained at the plurality of elements to thereby instantiate respective configurations, and command the plurality of elements to execute specific instructions to instantiate a subsequent configuration specification only if acknowledgments are received from each of the plurality of elements that a preceding configuration has been successfully instantiated, wherein multiple instructions are issued to multiple nodes of the connection-oriented network, the multiple nodes being included within an old route and a new route for a connection in sequential configuration specifications of the sequence of configuration specifications.