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
1-5
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 1 Troubleshooting Overview
Troubleshooting Basics
•
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:
