System for updating selected part of configuration information stored in a memory of a network element depending on status of received state variable

• US 6,128,656 A
• Filed: 09/10/1998
• Issued: 10/03/2000
• Est. Priority Date: 09/10/1998
• Status: Expired due to Term

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Pleshek, Ronald A., Taylor, Robert C., Matchefts, Marco J.
• Primary Examiner(s): Luu, Le Hein
• Application Number:
  US09/150,878
• Time in Patent Office: 754 Days
• Field of Search: 709/223, 709/224, 709/100, 710/103, 703/22
• US Class Current: 709/223
• CPC Class Codes: H04L 41/0213 Standardised network management protocols, e.g. simple network management protocol [SNMP]
• CPC Class Codes: H04L 41/06 Management of faults, events, alarms or notifications
• 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
• CPC Class Codes: H04L 41/22 comprising specially adapted graphical user interfaces [GUI]

Abstract

A system for updating a memory storing configuration information of a network element includes a network element and a network manager coupled to the network element using a communication network. The network manager receives selected configuration information from the network element to update a selected part of the memory if a received state variable does not match a stored state variable.

Claims

1. A system for updating a memory storing configuration information of a network element, comprising:

a network element operable to store configuration information; and

a network manager coupled to the network element using a communication network, the network manager operable to store a portion of the configuration information in memory, the network manager further operable to receive a state variable from the network element and to compare the received state variable to a stored state variable, the network manager further operable to receive selected configuration information from the network element to update a selected part of the memory if the received state variable does not match the stored state variable.

2. The system of claim 1, wherein the network element comprises a digital subscriber line access multiplier.

3. The system of claim 1, wherein the memory comprises:

a database; and

a cache coupled to the database, wherein the cache provides faster access to selected configuration information maintained in the database.

4. The system of claim 3, further comprising a client coupled to the network manager and operable to execute a graphical user interface to present configuration information stored in the cache to a human user.

5. The system of claim 1, wherein the configuration information comprises:

first configuration information specified by the network manager in a plurality of set requests communicated to the network element; and

second configuration information autonomously generated by the network element in a plurality of traps.

6. The system of claim 1, wherein:

the configuration information comprises a plurality of traps; and

the received state variable comprises a trap sequence number associated with a last trap generated by the network element.

7. The system of claim 6, wherein each trap identifies a selected one of an alarm, an alarm clear, or a module insertion event.

8. The system of claim 1, wherein:

the configuration information comprises a plurality of data subsets; and

the network manager requests a particular data subset from the network element to update the selected part of the memory if a checksum stored in the memory and associated with the particular data subset does not match a corresponding checksum received from the network element.

9. The system of claim 1, wherein the state variable comprises a set request number indicating the number of times configuration information in the network element has been modified.

10. The system of claim 1, further comprising a second network manager operable to modify configuration information of the network element so that the memory maintained at the network manager does not reflect the modified configuration information.

11. A network manager, comprising:

a network interface operable to receive configuration information from a network element, the configuration information comprising at least one state variable;

a cache operable to store a subset of the configuration information; and

a processor coupled to the network interface and the cache, the processor operable to compare the received state variable to a stored state variable, wherein the network manager receives selected configuration information from the network element to update a selected part of the cache if the received state variable does not match the stored state variable.

12. The network manager of claim 11, and further comprising a database operable to store configuration information of the network element, wherein the cache provides faster access to selected configuration information stored in the database.

13. The network manager of claim 11, further comprising a client operable to execute a graphical user interface to present configuration information stored in the cache to a human user.

14. The network manager of claim 11, wherein the network interface comprises:

a network monitor operable to poll the network element for configuration information; and

an alarm formatter operable to receive configuration information autonomously generated by the network element in a plurality of traps.

15. The network manager of claim 11, wherein:

the configuration information comprises a plurality of traps; and

the received state variable comprises a trap sequence number associated with a last trap generated by the network element.

16. The network manager of claim 15, wherein each trap identifies a selected one of an alarm, an alarm clear, or a module insertion event.

17. The network manager of claim 11, wherein:

the configuration information comprises a plurality of data subsets; and

the processor receives a plurality of checksums associated with the data subsets; and

the processor requests a particular data subset from the network element to update the selected part of the memory if the received checksum for the particular data subset does not match the stored checksum for the particular data subset.

18. The network manager of claim 11, wherein the state variable comprises a set request number indicating the number of times configuration information in the network element has been modified.

19. The network manager of claim 11, further comprising a second network manager operable to modify configuration information of the network element so that the memory does not reflect the modified configuration information.

20. A method for updating a memory storing configuration information of a network element, comprising:

storing, in a memory located remotely from the network element, a portion of configuration information maintained by a network element;

receiving a first state variable from the network element;

receiving a second state variable from the memory; and

receiving selected configuration information from the network element to update a selected part of the memory if the first state variable does not match the second state variable.

21. The method of claim 20, wherein the memory comprises a database and a cache coupled to the database, and further comprising the step of providing faster access to selected configuration information maintained in the database using the cache.

22. The method of claim 21, further comprising a client coupled to the network manager and operable to execute a graphical user interface to present configuration information stored in the cache to a human user.

23. The method of claim 20, wherein the network element comprises a digital subscriber line access multiplier.

24. The method of claim 20, wherein the configuration information maintained by the network element comprises:

first configuration information specified by a network manager in a plurality of set requests communicated to the network element; and

second configuration information autonomously generated by the network element in a plurality of traps.

25. The method of claim 20, wherein:

the configuration information comprises a plurality of traps; and

the first state variable comprises a trap sequence number associated with a last trap generated by the network element.

26. The method of claim 25, wherein each trap identifies a selected one of an alarm, an alarm clear, or a module insertion event.

27. The method of claim 20, wherein the configuration information comprises a plurality of data subsets, and further comprising:

receiving a first checksum associated with a particular data subset from the network element;

receiving a second checksum from the memory; and

requesting the particular data subset from the network element to update the selected part of the memory if the first checksum does not match the second checksum.

28. The method of claim 20, wherein the state variable comprises a set request number indicating the number of times configuration information in the network element has been modified.

29. The method of claim 20, further comprising a second network manager operable to modify configuration information of the network element so that the memory maintained at the network manager does not reflect the modified configuration information.