> # Port Swapping

> The FICON port-swapping feature is only provided for maintenance purposes.

> The FICON port-swapping feature causes all configurations associated with old-port-number and new port-number to be swapped, including VSAN configurations.

> Cisco MDS switches allow port swapping for nonexistent ports as follows:

> - Only FICON-specific configurations (prohibit, block, and port address mapping) are swapped.
> - No other system configuration is swapped.
> - All other system configurations are only maintained for existing ports.
> - If you swap a port in a module that has unlimited oversubscription ratios enabled with a port in a module that has limited oversubscription ratios, then you may experience a degradation in bandwidth.

> Tip 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.

> 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.

> Note To view the latest FICON information, you must click the Refresh button. See the "Automatically Saving the Running Configuration" topic.

> Copyright 2010-2015, Cisco Systems, Inc. All rights reserved.