FICON Administrator's Guide v6.4.0 (53-1001771-01, June 2010)

FICON Administrator’s Guide 65
53-1001771-01
Troubleshooting FICON
5
By default, the FICON group in the supportShow output is disabled. To enable the capture of
FICON data in the supportShow output, enter the supportShowCfgEnable ficon command.
After you get confirmation that the configuration has been updated, the following will be
collected and appear in the output for the supportShow command:
- ficonCupShow fmsmode
- ficonCupShow modereg
- ficonDbg dump rnid
- ficonDbg log
- ficonShow ilir
- ficonShow lirr
- ficonShow rlir
- ficonShow rnid
- ficonShow switchrnid
- ficuCmd dump -A
• Type of mainframe involved. Need make, model, and driver levels in use.
• Type of actual storage array installed. Many arrays will emulate a certain type of IBM array and
we need to know the exact make, model, and firmware of the array in use.
• Other detailed information for protocol-specific problems:
- Port data structures, displayed using the ptDataShow command.
- Port registers, displayed using the ptRegShow command.
• Read Brocade Release Notes for specific version information regarding the Fabric OS installed.
The following needs to be performed to troubleshoot all FICON setups:
• Perform a configUpload to gather configuration files. Provide the IOCDS mainframe file.
This will define how all mainframe ports are configured.
• Verify that Dynamic Load Sharing (DLS) has been disabled with the dlsReset command.
If DLS is enabled, traffic on existing ISL ports might be affected when one or more new ISLs is
added between the same two switches. Specifically, adding the new ISL might result in
dropped frames as routes are adjusted to take advantage of the bandwidth provided. By
disabling DLS, you ensure that there will be no dropped frames. In a supportshow, search for
route.stickyRoutes and check for a value of 1 or enter the dlsShow command.
• Verify that IOD is enabled using the iodSet command to ensure in-order delivery.
In the output from the supportShow or supportSave, search for the route.delayReroute and
check for a value of 1 as this indicates that the feature is turned on or enter the iodShow
command.
Switched point-to-point topology checklist
This checklists lists items you should perform in your FICON environment to ensure proper
functionality of the feature:
• Does your Brocade switch or director have Fabric OS v6.1.0 or later release installed?
• Are you using an appropriate management tool such as Brocade Fabric Manager (FM) v5.4.0
or later, EFCM v9.6.x, or DCFM?