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Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 1 Troubleshooting Overview
Troubleshooting Basics
• View traffic statistics—In Device Manager, click the Device tab, select one or more ports, right-click
and choose Monitoring from the pop-up menu.
Fabric Manager and Device Manager also provide the following tools to proactively monitor your fabric:
• ISL performance—In Fabric Manager, click the ISL Performance icon.
• Network monitoring—In Device Manager, click the Summary tab.
• Performance monitoring—In Fabric Manager, choose Performance > Start Collection.
Common CLI Commands
Issue the following commands and examine the outputs:
• show module
• show version
• show running-config
• show logging log
• show interfaces brief
• show fcns
• show flogi
• show hardware internal errors
• show zoneset active
• show accounting log
Note Use the show running interface CLI command to view the interface configuration in Cisco SAN-OS
Release 3.0(1) or later. The interface configuration as seen in the show running-config CLI command
is no longer consolidated.
Note To issue commands with the internal keyword, you must have an account that is a member of the
network-admin group.
Verifying Basic Connectivity
Answer the following questions to verify basic connectivity between your end devices:
• Are you using the correct fiber (SM or MM)?
• Did you check for a broken fiber?
• Is the Fibre Channel port LED on the connected module green, and do the LEDs on any host bus
adapter (HBA)/storage subsystem ports indicate normal functionality?
• Is there a LUN masking policy applied on the storage subsystem? If yes, is the server allowed to see
the LUNs exported by the storage array?
• Is there a LUN masking policy configured on the host? Did you enable the server to see all the LUNs
it can access?
• If LUN masking software is used, is the host’s pWWN listed in the LUN masking database?
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