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16-2
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 16 Troubleshooting FICON
FICON Overview
Note The FICON feature is not supported on Cisco MDS 9120, 9124 or 9140 switches, the 32-port Fibre
Channel switching module, Cisco Fabric Switch for HP c-Class BladeSystem or Cisco Fabric Switch for
IBM BladeCenter.
Refer to the Cisco MDS 9000 Family configuration guides for details about configuring FICON at one
of the following websites:
• Cisco MDS 9000 Family Fabric Manager Configuration Guide, Release 3.x at
http://www.cisco.com/en/US/products/ps5989/products_configuration_guide_chapter09186a0080
662d7a.html
• Cisco MDS 9000 Family CLI Configuration Guide, Release 3.x at
http://www.cisco.com/en/US/products/ps5989/products_configuration_guide_chapter09186a0080
664d07.html
FICON Port Numbering
With reference to the FICON feature, ports in Cisco MDS switches are identified by a statically defined
8-bit value known as the port number. A maximum of 255 port numbers are available. You can use the
following port numbering schemes:
• Default port numbers based on the chassis type
• Reserved port numbers
The following guidelines apply to FICON port numbers:
• Supervisor modules do not have port number assignments.
• Chassis-wide unique port numbers should be reserved for trunking expansion (TE) ports since TE
ports appear in multiple VSANs.
• Each PortChannel must be explicitly associated with a FICON port number.
• For individual ports in a PortChannel, the configuration of the port corresponding to the
PortChannel is applied and not that of the individual port.
• Each FCIP tunnel must be explicitly associated with a FICON port number. If the port numbers are
not assigned for PortChannels or for FCIP tunnels, the associated ports will not come online.
Note When you assign, change, or release a port number, the port goes offline and then back online as a result
of the change.
Default FICON Port Numbering Scheme
Default FICON port numbers are assigned by the Cisco MDS SAN-OS software based on the module
and the slot in the chassis. The first port in a switch always starts with a zero (0).
Table 16-1 lists the default port number assignments for the Cisco MDS 9000 Family of switches and
directors.
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