Qlogic 12000 Series Reference Manual page 116

Switch Command Line Interface
Groups and Commands
ismChassisSetSpeed
Allows the user to view and set port link speeds for the entire chassis.
Syntax:
ismChassisSetSpeed [speed] [-bounce]
Options:
speed
1=SDR 2=DDR 3=SDR/DDR 4=QDR 5=SDR/QDR 6=DDR/QDR 7=SDR/DDR/QDR
-bounce
Brings the active links down and back up if a new value is set.
Sample Output:
-> ismChassisSetSpeed 1
L01P01 link speed is SDR
L01P02 link speed is SDR
L01P03 link speed is SDR
...
NOTE:
ismPortEnable
Allows the user to enable or disable a port.
Syntax:
ismPortEnable port
Options:
port
Port name.
1-108
This command can be used to set the supported link speed on each
of the chassis ports. This command does not cause the associated
ports to change the active or enabled speed of the port. The active
and enabled speed is changed the next time the port transitions down
and back up. Each external port must be connected to another
similarly configured port to establish a link.
Calling this function without a speed designator displays the current
values of the port.
Calling this function with the [-bounce] option disruptively brings
active links down and back up so the links use the new setting
immediately. Otherwise the new setting is used the next time links
retrain.
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