allow-v2-modules

Syntax

no allow-v2-modules

Enables Compatibility Mode for interoperation of v2 zl and zl modules in the same chassis.

allow-v2–modules

switch(config)# allow-v2-modules
This will erase the configuration and reboot the switch.
Continue (y/n)?

no allow-v2–modules

The no form of the command disables Compatibility Mode. Only the v2 zl modules are powered up. Defaults to enabled. 
switch(config)# no allow-v2-modules
This command will disable all V2 modules and reboot the switch.
Continue (y/n)? y