Cisco Systems MDS 9000 Clearing FICON Device Allegiance

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22-19

Cisco MDS 9000 Family Fabric Manager Configuration Guide

OL-6965-03, Cisco MDS SAN-OS Release 2.x

Chapter 22 FICON Configuration

Clearing FICON Device Allegiance

Be sure to follow these guidelines when using the FICON port swap feature:

•Port swapping is not supported for logical ports (PortChannels, FCIP links). Neither the

old-port-number nor the new-port-number can be a logical port.

•Port swapping is not supported between physical ports that are part of a PortChannel. Neither the

old-port-number nor the new-port-number can be a physical port that is part of a PortChannel.

•Before performing a port swap, the Cisco MDS SAN-OS software performs a compatibility check.

If the two ports have incompatible configurations, the port swap is rejected with an appropriate

reason code. For example, if a port with BB_credits as 25 is being swapped with an OSM port for

which a maximum of 12 BB_credits is allowed (not a configurable parameter), the port swapping

operation is rejected.

•If ports have default values (for some incompatible parameters), then a port swap operation is

allowed and the ports retain their default values. If you swap a 16-port module with a 32-port

module, the BB_credits will no longer be compatible and the ports can be swapped. If BB_credits

are not configured, the default settings will still be in effect at the time of the swap.

Note The 32-port module guidelines also apply for port swapping configurations (see the “32-Port

Configuration Guidelines” section on page 18-5).

Note To view the latest FICON information, you must click the Refresh button. See the “FICON Information

Refresh Note” section on page 22-14 for more information.

To swap ports using Device Manager, follow these steps:

Step 1 Select two Fibre Channel ports, by holding down the CTRL key and clicking on them with the mouse.

Step 2 Select Swap Selected Ports from the FICON menu.

Clearing FICON Device Allegiance

FICON requires serialization of access among multiple mainframes, CLI, and SNMP sessions be

maintained on Cisco MDS 9000 Family switches by controlling device allegiance for the currently

executing session. Any other session is denied permission to perform configuration changes unless the

required allegiance is available.

Caution This task terminates the currently executing session.