what can I do ?
you can not translate these commands on a simple way
cisco has a fundamental opposite understanding of vlan commands, and also the extreme policy commands are a completely other way to do this
To solve your Problem you need a Cisco CCIE and an Extreme ECE.. and it should be the same person :-)
As Zdenek mentioned there is a legacy CLI XMOD that can be installed with the XOS image. This can be found on our support portal with the rest of the images. You would install it just like you would install XOS just make sure you specify the running partition and use the command "run update" or reboot the afterwards.
CLI Legacy Module:
ExtremeXOS Legacy CLI Quick Reference Guide:
Also, you can find more information in the Article below: