If you check the Active=Saved check box active equals saved is enabled on any FICON VSAN, then the
swapped configuration is automatically saved to startup. Otherwise, you must explicitly save the running
configuration immediately after swapping the ports.
Tip
Once you swap ports, the switch automatically performs the following actions:
• Shuts down both the old and new ports.
• Swaps the port configuration.
If you attempt to bring the port up, you must explicitly shut down the port to resume traffic.
To view the latest FICON information, you must click the Refresh button. See the Automatically Saving the
Running Configuration, on page 268.
Note
The ficon swap portnumber command is only associated with the two ports concerned. You must issue this
VSAN-independent command from EXEC mode. Cisco MDS NX-OS checks for duplicate port numbers in
a VSAN before performing the port swap.
If you attempt to bring the port up by specifying the ficon swap portnumber old-port-number new-port-number
after swap noshut command, you must explicitly issue the no shutdown command to resume traffic.
This section includes the following topics:
About Port Swapping
Be sure to follow these guidelines when using the FICON port swapping 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 NX-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.
• Before performing a port swap, the Cisco NX-OS software performs a compatibility check to verify the
extended BB_credits configuration.
• If ports have default values (for some incompatible parameters), then a port swap operation is allowed
and the ports retain their default values.
• Port tracking information is not included in port swapping. This information must be configured separately
(refer to the Cisco MDS 9000 Family NX-OS Quality of Service Configuration Guide ).
The 32-port module guidelines also apply for port swapping configurations (Refer to the Cisco MDS 9000
Family NX-OS Interfaces Configuration Guide ).
Note
Cisco MDS 9000 Series Fabric Configuration Guide, Release 8.x
283
Configuring FICON
About Port Swapping
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