HP Brocade 4Gb SAN Switch for HP BladeSystem p-Class - Manual (Page 224)

224 Configuring interoperability mode
Example:
5. Wait for a fabric reconfiguration after removing each switch.
6. Each non-HP StorageWorks switch may require the execution of a similar command to disable
interoperability.
7. Repeat this procedure on all HP StorageWorks switches in the fabric.
switch:admin> switchdisable
switch:admin> interopmode 0
The switch effective configuration will be lost when the operating mode
is changed; do you want to continue? (yes, y, no, n): [no] y
done.
Interopmode is disabled
Note: It is recommended that you reboot this switch for the new change to
take effect.
switch:admin>