Diagnosis and throughput measurement of fibre channel ports in a storage area network environment

• US 10,243,826 B2
• Filed: 12/07/2017
• Issued: 03/26/2019
• Est. Priority Date: 01/10/2015
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Dasu, Santa, Pitta, Srinivas, Talagadadeevi, Venkata Ramana
• Primary Examiner(s): Book, Phyllis A
• Application Number:
  US15/835,033
• Publication Number:
  US 20180097714A1
• Time in Patent Office: 474 Days
• Field of Search: None
• CPC Class Codes: H04L 41/0853 by actively collecting configuration information or by backing up configuration information
• CPC Class Codes: H04L 43/0852 Delays
• CPC Class Codes: H04L 43/0888 Throughput
• CPC Class Codes: H04L 43/10 Active monitoring, e.g. heartbeat, ping or trace-route
• CPC Class Codes: H04L 43/50 Testing arrangements
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]

Abstract

An example method for diagnosis and throughput measurement of FC ports in a SAN environment is provided and includes generating, by a control processor at a generator in the SAN, a control packet requesting a link test to be performed with a reflector in the SAN, sending the control packet to the reflector through a media access controller (MAC) of the generator, receiving, at the MAC of the generator, an acknowledgement from the reflector indicating ability to perform the requested link test, generating, at the MAC of the generator, a test data packet for the link test, performing the link test with the reflector, and analyzing, at the generator, network parameters based on results of the link test.

Claims

1. A method executed in a storage area network (SAN), comprising:

generating, at a generator located in a first switch in the SAN, a test data packet for a link test between the generator and a reflector located in a different second switch in the SAN; and

performing the link test with the reflector; and

automatic provisioning of a link based on results of the link test;

wherein the automatic provisioning adds the link to a port channel between the first switch and a second switch when results of the link test indicates suitable link performance;

wherein the automatic provisioning does not add the link to the port channel when results of the link test indicates unsuitable link performance.

2. The method of claim 1, wherein the generator and the reflector are connected back-to-back with each other, and wherein the link test is performed on a back-to-back link between the generator and the reflector.

3. The method of claim 2, wherein the test data packet is in Exchange Peer Parameters Protocol (EPP) with a Port Diagnostic Protocol (PDP) set to indicate the link test.

4. The method of claim 2, wherein the reflector configures a MAC at the reflector to loopback the test data packet received from the generator during the link test.

5. The method of claim 2, wherein the reflector configures a crossbar at the reflector to loopback the test data packet to a port on which the test data packet was received from the generator during the link test.

6. The method of claim 1, wherein the generator and the reflector are connected across multiple hops in the SAN, wherein the link test is performed between a first simulated endpoint at the generator and a second simulated endpoint at the reflector.

7. The method of claim 6, wherein the test data packet is in Cisco Fabric Services (CFS) protocol with a source service access point (SAP) indicating the first simulated endpoint and a destination SAP indicating the second simulated endpoint.

8. The method of claim 6, wherein a fabric diagnostics application at the generator generates a first Fibre Channel Identifier (FCID) corresponding to the first simulated endpoint at the generator, wherein another fabric diagnostics application at the reflector generates a second FCID corresponding to the second simulated endpoint at the reflector.

9. The method of claim 8, wherein a MAC of the generator inserts the first FCID as a source address and the second FCID as a destination address in the test data packet before sending the test data packet to the reflector during the link test.

10. The method of claim 8, wherein a crossbar of the reflector performs a loopback of the test data packet, inserting the second FCID as a source address and the first FCID as a destination address in the test data packet before returning the test data packet back to the generator.

11. Non-transitory tangible computer readable media that includes instructions for execution, which when executed by a processor, is operable to perform operations comprising:

generating, at a generator located in a first switch in a SAN, a test data packet for a link test between the generator and a reflector located in a different second switch in the SAN; and

performing the link test with the reflector; and

automatic provisioning of a link based on results of the link test;

wherein the automatic provisioning adds the link to a port channel between the first switch and a second switch when results of the link test indicates suitable link performance;

wherein the automatic provisioning does not add the link to the port channel when the results of the link test indicates unsuitable link performance.

12. The media of claim 11, wherein the link test is performed on a back-to-back link between the generator and the reflector.

13. The media of claim 12, wherein the test data packet is in Exchange Peer Parameters Protocol (EPP) with a Port Diagnostic Protocol (PDP) set to indicate the link test.

14. A system, comprising:

a memory for storing data; and

a processor programmed to cooperate with the memory to execute operations comprising;

generating, at a generator located in a first switch in a SAN, a test data packet for a link test between the generator and a reflector located in a different second switch in the SAN; and

performing the link test with the reflector; and

automatic provisioning of a link based on results of the link test;

wherein the automatic provisioning adds the link to a port channel between the first switch and a second switch when results of the link test indicates suitable link performance;

wherein the automatic provisioning does not add the link to the port channel when results of the link test indicates unsuitable link performance.

15. The system of claim 14, wherein the generator and the reflector are connected back-to-back with each other, and wherein the link test is performed on a back-to-back link between the generator and the reflector.

16. The system of claim 15, wherein the test data packet is in Exchange Peer Parameters Protocol (EPP) with a Port Diagnostic Protocol (PDP) set to indicate the link test.

17. The system of claim 15, wherein the reflector configures a MAC at the reflector to loopback the test data packet received from the generator during the link test.

18. The system of claim 15, wherein the reflector configures a crossbar at the reflector to loopback the test data packet to a port on which the test data packet was received from the generator during the link test.

19. The system of claim 15, wherein the generator and the reflector are connected across multiple hops in the SAN, wherein the link test is performed between a first simulated endpoint at the generator and a second simulated endpoint at the reflector.

20. The system of claim 19, wherein the test data packet is in Cisco Fabric Services (CFS) protocol with a source service access point (SAP) indicating the first simulated endpoint and a destination SAP indicating the second simulated endpoint.