System and method for providing proactive fault monitoring in a network environment

• US 8,774,010 B2
• Filed: 11/02/2010
• Issued: 07/08/2014
• Est. Priority Date: 11/02/2010
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Mishra, Chandan, Watve, Rohit S.
• Primary Examiner(s): Chriss, Andrew
• Assistant Examiner(s): FAYED, RASHA K
• Application Number:
  US12/938,237
• Publication Number:
  US 20120106358A1
• Time in Patent Office: 1,344 Days
• Field of Search: 709238-239, 709/242, 3702411-245, 370/248, 370250-255
• US Class Current: 370/242
• CPC Class Codes: G06F 15/173 using an interconnection network, e.g. matrix, shuffle, pyramid, star, snowflake
• CPC Class Codes: H04L 43/00 Arrangements for monitoring or testing data switching networks
• CPC Class Codes: H04L 43/0817 by checking functioning
• CPC Class Codes: H04L 43/10 Active monitoring, e.g. heartbeat, ping or trace-route

Abstract

An example method is provided and includes communicating a request packet to a first network element. The request packet is associated with a request for a list of flow parameters. The method also includes receiving a response to the request for the list of flow parameters, and communicating a test packet to initiate fault monitoring. The test packet is communicated to a second network element and the test packet includes at least one of the flow parameters provided by the first network element. The method also includes receiving a plurality of fault monitoring results. The results are limited to reflect multiple paths associated with the first network element.

Claims

1. A method, comprising:

communicating a request packet from an originating network element to a first next hop network element, wherein the request packet is associated with a request for a list of MAC addresses;

receiving a response to the request;

communicating a test packet to initiate fault monitoring, wherein the test packet is communicated to a second next hop network element and the test packet includes at least one of the MAC addresses provided by the first next hop network element; and

receiving a plurality of fault monitoring results, wherein the results are limited to reflect results of monitoring multiple paths between the originating network element and the second hop network element and associated with the first next hop network element;

wherein the fault monitoring comprises at least one of detecting, isolating, and correcting a malfunction in the multiple paths between the originating network element and the second hop network element and associated with the first next hop network element; and

wherein the originating network element and the second next hop network element are connected via a plurality of paths through the first hop network element and the test packet is communicated using equal cost multipath (“

ECMP”

) routing.

2. The method of claim 1, wherein the response to the request includes a media access control (MAC) address associated with the second network element.

3. The method of claim 1, wherein the request packet includes a time to live (TTL) parameter set to one.

4. The method of claim 1, wherein a TTL expiry message is received in response to the test packet.

5. The method of claim 1, wherein the first network element and the second network element are separated by one hop in a network environment.

6. The method of claim 1, wherein the request packet is communicated by an originating switch operating in a multipath network, and wherein the flow parameters are associated with equal cost multiple paths (ECMPs) two hops from the originating switch.

7. The method of claim 1, wherein an additional request is communicated to an additional network element, the additional request being associated with a request for an additional list of flow parameters, and wherein the additional request triggers a subsequent fault monitoring process associated with the additional network element.

8. One or more non-transitory tangible media that includes code for execution and when executed by a processor operable to perform operations comprising:

communicating a request packet from an originating network element to a first next hop network element, wherein the request packet is associated with a request for a list of MAC addresses;

receiving a response to the request;

communicating a test packet to initiate fault monitoring, wherein the test packet is communicated to a second next hop network element and the test packet includes at least one of the MAC addresses provided by the first next hop network element; and

receiving a plurality of fault monitoring results, wherein the results are limited to reflect results of monitoring multiple paths between the originating network element and the second hop network element and associated with the first next hop network element;

wherein the fault monitoring comprises at least one of detecting, isolating, and correcting a malfunction in the multiple paths between the originating network element and the second hop network element and associated with the first next hop network element; and

wherein the originating network element and the second next hop network element are connected via a plurality of paths through the first hop network element and the test packet is communicated using equal cost multipath (“

ECMP”

) routing.

9. The media of claim 8, wherein the response to the request includes a media access control (MAC) address associated with the second network element.

10. The media of claim 8, wherein the request packet includes a time to live (TTL) parameter set to one.

11. The media of claim 8, wherein a TTL expiry message is received in response to the test packet.

12. The media of claim 8, wherein the first network element and the second network element are separated by one hop in a network environment.

13. The media of claim 8, wherein the request packet is communicated by an originating switch operating in a multipath network, and wherein the flow parameters are associated with equal cost multiple paths (ECMPs) two hops from the originating switch.

14. The media of claim 8, wherein an additional request is communicated to an additional network element, the additional request being associated with a request for an additional list of flow parameters, and wherein the additional request triggers a subsequent fault monitoring process associated with the additional network element.

15. An apparatus, comprising:

a memory element configured to store electronic code,

a processor operable to execute instructions associated with the electronic code, and

a fault monitoring module configured to interface with the processor and the memory element in order to cause the apparatus to;

communicate a request packet from an originating network element to a first next hop network element, wherein the request packet is associated with a request for a list of MAC addresses;

receive a response to the request;

communicate a test packet to initiate fault monitoring, wherein the test packet is communicated to a second next hop network element and the test packet includes at least one of the MAC addresses provided by the first next hop network element; and

receive a plurality of fault monitoring results, wherein the results are limited to reflect results of monitoring multiple paths between the originating network element and the second hop network element and associated with the first next hop network element;

wherein the fault monitoring comprises at least one of detecting, isolating, and correcting a malfunction in the multiple paths between the originating network element and the second hop network element and associated with the first next hop network element; and

wherein the originating network element and the second next hop network element are connected via a plurality of paths through the first hop network element and the test packet is communicated using equal cost multipath (“

ECMP”

) routing.

16. The apparatus of claim 15, wherein the response to the request includes a media access control (MAC) address associated with the second network element.

17. The apparatus of claim 15, wherein the request packet includes a time to live (TTL) parameter set to one.

18. The apparatus of claim 15, wherein a TTL expiry message is received in response to the test packet.

19. The apparatus of claim 15, wherein the first network element and the second network element are separated by one hop in a network environment.

20. The apparatus of claim 15, wherein an additional request is communicated to an additional network element, the additional request being associated with a request for an additional list of flow parameters, and wherein the additional request triggers a subsequent fault monitoring process associated with the additional network element.