Method and apparatus for backward and forward compatibilty in device management

• US 7,761,543 B2
• Filed: 07/09/2002
• Issued: 07/20/2010
• Est. Priority Date: 07/09/2002
• Status: Expired due to Fees

• Current Assignee: Ciena Corporation
• Original Assignee: Ciena Corporation
• Inventors: Hyndman, Arn C., Pye, Glen M., Magnet, Jerome
• Primary Examiner(s): PHILLIPS, HASSAN A
• Application Number:
  US10/190,528
• Publication Number:
  US 20040010576A1
• Time in Patent Office: 2,933 Days
• Field of Search: 709/223, 717/174
• US Class Current: 709/223
• CPC Class Codes: H04L 41/00 Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks

Abstract

A method and system permitting a network management system to be backward and forward compatible with a range of network elements or devices, and device versions. The present invention uses a combination of versioned interface negotiation, data driven interfaces or self-describing devices, and a support matrix of management features supported by various versions of the network management system, to provide the network management system with both backward and forward compatibility. This permits a single version of a management system to be backward compatible with a series of network elements that predate the management system'"'"'s release, and to be forward compatible with a series of network elements that follow the management system'"'"'s release, even in the face of unpredictable changes in the devices with which the management system interacts. The invention also permits the vendor to control which features are enabled for the various combinations of network element versions and management system versions and thus how much testing is required.

Claims

1. A method for device management in a network management system, comprising:

receiving, automatically upon initialization of a network element, a single network element support matrix represented as a byte array, from the network element, the network element support matrix having a set of support flags for each of a plurality of versions of the network management system, the support flags being represented as bits in the byte array, and each set of support flags defining at least one management feature supported in each of the plurality of versions to enable interoperation of the network element and the network management system; and

upon receipt of only the single network element support matrix, extracting therefrom the set of support flags associated with a current installed version of the network management system and activating the at least one management feature supported by the current installed version as defined in the extracted set of support flags, without transmitting any network management system version information to the network element for negotiation.

2. The method of claim 1, wherein receiving the network element support matrix includes retrieving it from storage means within the network element.

3. The method of claim 1, wherein extracting the set of support flags associated with the current installed version includes extracting a row of the network element support matrix.

4. The method of claim 3, wherein the row is represented as byte array.

5. A network management system, comprising:

a messaging sub-system, executing computer-readable instructions stored in computer-readable memory, for automatically receiving from a network element at initialization, a single network element support matrix, represented as a byte array, having a set of support flags for each of a plurality of versions of the network management system, the support flags being represented as bits in the byte array, and each set of support flags defining at least one management feature supported in its respective version to enable interoperation of the network element and the network management system; and

an activation sub-system, executing computer-readable instructions stored in computer-readable memory, for receiving, from the messaging sub-system, only the single network element support matrix, and, upon receipt of the single network element support matrix, extracting therefrom the set of support flags associated with the current installed version of the network management system and activating the at least one management feature supported in the current installed version without transmitting any network management system version information to the network element for negotiation.

6. The network management system of claim 5, wherein the network element support matrix includes a feature list and a plurality of support flags corresponding to the availability of each management feature in the feature list for each of the plurality of versions.

7. The network management system of claim 5, further including protocol negotiation means to communicate between network elements and the network management system.

8. The network management system of claim 5, further including a data driven interface to permit the network element to self-describe.

9. The network management system of claim 5, wherein the network element includes self-description capabilities.

10. A network element for remote monitoring by a network management system, comprising:

a single network element support matrix, stored in computer-readable memory, having a set of support flags for each of a plurality of versions of the network management system, each set of support flags being a row in the network element support matrix, wherein the row is a byte array, each bit in the byte array representing a support flag, and each set of support flags defining management features supportable in its respective version;

a network element messaging sub-system, operatively in connection to the network management system, for automatically transmitting the single network element support matrix to a currently installed version of the network management system upon initialization of the network element to permit, upon receipt of only the single network element support matrix, extraction of the set of support flags corresponding to the currently installed version of the management support system to enable interoperation of the network element and the network management system without transmitting any network management system version information to the network element for negotiation; and

a lookup sub-system for receiving a current installed network management system version from a network element messaging sub-system, and for parsing the network element support matrix to select the set of support flags corresponding to the current installed network management system version.

11. The network element of claim 10, wherein the network element support matrix is stored as a byte array.

12. The network element of claim 10, wherein the network element support matrix is stored in the network element.

13. A tangible computer-readable medium having stored thereon executable instructions for execution by a computer system, for providing device management in a network management system, comprising:

a network management messaging module for causing the computer system to receive, from a network element at initialization, a single network element support matrix, represented as a byte array, having a set of support flags represented as bits in the byte array, and defining supported management features for each of a plurality of versions of the network management system; and

an activation module, communicating with the messaging module, for causing the computer system, upon receipt of only the single network element support matrix, to extract therefrom the set of support flags for a currently installed version of the network management system, and to activate the supported management features for the current installed version without transmitting any network management system version information to the network element for negotiation.

14. The computer-readable program medium of claim 13, wherein the network element support matrix includes a feature list and a plurality of sets of support flags corresponding to the availability of each management feature in the feature list for each of a plurality of supported versions.

15. The computer-readable program medium of claim 13, wherein the activation module includes means for selecting one the sets of support flags corresponding to the current installed version of the network management system.

16. A network management system, comprising:

means for receiving, automatically upon initialization of a network element, a single network element support matrix, represented as a byte array, from the network element, the network element support matrix including a set of support flags for each of a plurality of versions of the network management system, the support flags being represented as bits in the byte array, and each set of support flags defining at least one management feature supported in each of the plurality of versions to enable interoperation of the network element and the network management system;

means for determining a current installed version of the plurality of versions of the network management system;

means for, upon receipt of only the single network element support matrix, extracting therefrom the set of support flags associated with the current installed version of the network management system; and

means for activating the at least one management feature supported by the current installed version as defined in the extracted set of support flags without transmitting any network management system version information to the network element for negotiation.

17. The network management system of claim 16, further including means for protocol negotiation to enable network element to network management system communications.

18. The network management system of claim 16, further including means for permitting the network element to self-describe.

19. The network management system of claim 16, further including means for self-describing in the network element.

20. The network management system of claim 16, wherein the means for determining the network element support matrix includes means for loading it from storage means within the network element.

21. The network management system of claim 16, wherein the means for determining the current installed version includes means for receiving version information from the network management system.

22. The network management system of claim 16, wherein the means for extracting the set of support flags associated with the current installed version includes means for extracting a row of the network element support matrix.

23. A device management method for managing a device in a network management system, comprising:

steps for receiving, from a network element at initialization, a single network element support matrix, represented as a byte array, the single network element support matrix having a set of support flags represented as bits in the byte array, and defining supported management features for each of a plurality of versions of the network management system; and

steps for, upon receipt of only the single network element support matrix, extracting therefrom the set of support flags for a currently installed version of the network management system, and activating the supported management features for the current installed version without transmitting any network management system version information to the network element for negotiation.