Cisco MDS-9124 Troubleshooting Guide - Page 37

Chapter 1 Troubleshooting Overview Troubleshooting Basics Send documentation comments to [email protected] • Is the subsystem configured for an N port? Examine the FLOGI database on the two switches that are directly connected to the host HBA and subsystem ports. Also, verify that both ports (attached to MDS-A and MDS-B) are members of the same VSAN. If both devices are listed in the FCNS database then ISLs are not an issue. In Fabric Manager, choose Tools > Ping or Tools > Traceroute (or use the fcping or fctrace CLI commands) to verify connectivity. See the "FC Ping and FC Traceroute" section on page B-4. Verifying SAN Element Registration Answer the following questions to verify that your end devices are registered to the fabric: • Are the HBAs and subsystem ports successfully registered with the fabric name server? - In Device Manager, choose FC > Name Server. - In the CLI, use the show fcns commands. • Does the correct pWWN for the HBAs and the storage subsystem ports show up on the correct port in the FLOGI database? - In Fabric Manager, choose Switches > Interfaces > FC Physical > FLOGI. - In the CLI, use the show flogi commands. • Are the HBA and storage subsystem on the same VSAN? - In Fabric Manager, choose End Devices and verify the VSAN IDs are identical. - From the CLI, use the show vsan membership command. • Does any single zone contain both devices? - In Fabric Manager, choose the Zone > Edit Full Zone Database and select the active zone set (in bold) for the VSAN that contains the end devices. Verify that both devices are members of the same zone. - From the CLI, use the show zoneset active command. Fibre Channel End-to-End Connectivity Answering the following questions will help to determine if end-to-end Fibre Channel connectivity exists from a host or subsystem perspective: • Does the host list the subsystem's port WWN (pWWN) or FC ID in its logs? • Does the subsystem list the host's pWWN or FC ID in its logs or LUN masking database? • Can the host complete a port login (PLOGI) to the storage subsystem? • Is there any SCSI exchange that takes place between the server and the disk array? • Is the HBA configured for N port? You can use the HBA configuration utilities or the host system logs to determine if the subsystem pWWN or FC ID is listed as a device. This can validate that FSPF is working correctly. Fabric Issues Answering the following questions will help to determine the status of the fabric configuration: OL-9285-05 Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x 1-5