Verifying San Element Registration; Fibre Channel End-To-End Connectivity; Fabric Issues - Cisco 9134 - MDS Multilayer Fabric Switch Troubleshooting Manual

Chapter 1 Troubleshooting Overview
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
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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

Verifying SAN Element Registration

Answer the following questions to verify that your end devices are registered to the fabric:
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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:
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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:
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Is the subsystem configured for an N port?
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.
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From the CLI, use the show vsan membership command.
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Does any single zone contain both devices?
In Fabric Manager, choose the Zone > Edit Full Zone Database and select the active zone set
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(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.
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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?
"FC Ping and FC Traceroute" section on page
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
Troubleshooting Basics
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