Methods and apparatus for optimizing simple network management protocol (SNMP) requests

• US 6,539,540 B1
• Filed: 05/24/1999
• Issued: 03/25/2003
• Est. Priority Date: 05/24/1999
• Status: Expired due to Fees

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: 3Com Corporation (HP Inc.)
• Inventors: Hardak, Paul, Barkai, Sharon, Noy, Ariel, Vax, Zeev
• Primary Examiner(s): Morse, Gregory
• Assistant Examiner(s): NGUYEN BA, HOANG VU A
• Application Number:
  US09/316,977
• Time in Patent Office: 1,401 Days
• Field of Search: 717/8, 717/141, 717/142, 717/143, 709/220, 709/223, 709/224, 709/236, 709/242, 709/246, 709/313, 709/232, 707/2, 707/10, 707/104.1, 707/103.R, 370/395.53, 370/248, 370/254, 370/385, 714/43
• US Class Current: 717/141
• CPC Class Codes: G06F 9/465 Distributed object oriented systems remote method invocation [RMI] G06F9/548
• CPC Class Codes: H04L 41/0213 Standardised network management protocols, e.g. simple network management protocol [SNMP]
• CPC Class Codes: H04L 41/046 comprising network management agents or mobile agents therefor

Abstract

A method for optimizing the detection of a change in MIB information, the method including the steps of creating a MIB information request, sending the request to a SNMP agent, receiving a first response to the request from the SNMP agent, wherein the first response includes MIB information encoded as a byte array, and comparing the first response byte array to a comparison byte array to determine a difference therebetween.

Claims

1. A method of detecting a change in Management Information Base (MIB) information received from a Simple Network Management Protocol (SNMP) agent over a network, the method comprising the steps of:

generating a MIB information request;

sending said MIB information request to an SNMP agent over said network;

receiving a first response to said MIB information request from said SNMP agent, wherein said first response comprises MIB information encoded as a byte array, wherein said first response byte array is used as a baseline comparison byte array for response byte arrays received from said SNMP agent subsequent to the receipt of said first response;

comparing on a binary level said first response byte array to said baseline comparison byte array to determine if said MIB information has changed; and

if a change is detected, extracting MIB information from said first response byte array for comparison with baseline MIB information.

2. The method according to claim 1, further comprising repeating said steps of sending, receiving and comparing using said MIB information request created during said step of creating.

3. The method according to claim 1, wherein said MIB information request is created once and re-used each time it is to be sent to said SNMP agent.

4. The method according to claim 1, further comprising the step of, if a difference is not detected, conserving processing resources by not extracting MIB information from said response message and comparing to baseline comparison MIB information.

5. The method according to claim 1, wherein said baseline comparison information is generated from a first response received in response to a MIB information request.

6. The method according to claim 1, further comprising the step of storing a first response to said MIB information request as a byte array in a database for use as baseline comparison information in subsequent comparisons.

7. The method according to claim 1, wherein said response message comprises binary data encoded in Protocol Data Unit (PDU) in accordance with a transmission protocol of said network.

8. The method according to claim 1, wherein said SNMP agent sends the same response as previously sent if no change in MIB information has occurred since the previous request was received.

9. A system for detecting a change in Management Information Base (MIB) information comprising:

means for generating a MIB information request;

means for sending said MIB information request to a Simple Network Management Protocol (SNMP) agent over a network;

means for receiving a first response to said MIB information request from said SNMP agent, wherein said first response comprises MIB information encoded as a byte array, wherein said first response byte array is used as a comparison byte array for response byte arrays received from said SNMP agent subsequent to the receipt of said first response; and

means for comparing said first response byte array to said comparison byte array to determine whether a change in said response has occurred.

10. A method of detecting a change in Management Information Base (MIB) information received from a Simple Network Management Protocol (SNMP) agent over a network, the method comprising the steps of:

creating a MIB information request message;

sending said MIB information request message to an SNMP agent over said network;

receiving a first response message from said SNMP agent;

performing a binary comparison of said first response message to baseline comparison information wherein said first response byte array is used as said baseline comparison byte array for response byte arrays received from said SNMP agent subsequent to the receipt of said first response; and

if a byte level difference is detected as a result of said comparison, extracting MIB information from said response message and comparing said extracted MIB information with said baseline comparison information.

11. The method according to claim 10, wherein said MIB information request is created once and re-used each time it is to be sent to said SNMP agent.

12. The method according to claim 10, wherein said binary comparison comprises comparing byte strings of said response message and said baseline comparison MIB comparison information.

13. The method according to claim 10, further comprising the step of, if a difference is not detected, conserving processing resources by not extracting MIB information from said response message and comparing to baseline comparison MIB information.

14. The method according to claim 10, wherein said baseline comparison information is generated from a first response received in response to a MIB information request.

15. The method according to claim 10, further comprising the step of storing a first response to said MIB information request as a byte array in a database for use as baseline comparison information in subsequent comparisons.

16. The method according to claim 10, wherein said response message comprises binary data encoded in Protocol Data Unit (PDU) in accordance with a transmission protocol of said network.

17. The method according to claim 10, wherein said SNMP agent sends the same response as previously sent if no change in MIB information has occurred since the previous request was received.