Brocade licenses are keyed to a specific switch License ID, so they cannot be loaded on multiple switches. Thankfully these IDs are stored in a separate EEPROM and can be easily changed.
To download and use the master license files in this guide on as many switches as you need, you simply need to change your license ID to match. Only the license code reads this value, so changing it has no negative effects.
To do this, you need the latest firmware - this is not optional! Follow the update guide to upgrade to the latest firmware image if you haven't already - [ICX6650 Update & Start Guide](../icx6650/).
**Note:** If this is a new/unconfigured switch, or a switch with an unknown config on it, follow that update guide all the way through to the `Saving & Conclusions` section! This will get the switch in a state that it can TFTP licenses in.
Once it's booted into the OS, ensure you are hosting the firmware ZIP contents via TFTP. If you need an easy and temporary TFTP server for windows, I recommend [Tftpd32 Portable Edition](http://www.tftpd64.com/tftpd32_download.html). Now we can import the licenses. Replace the IPs in the commands with the IP of your own TFTP server:
The ```Status``` column should show ```Active``` for all the new licenses.
**Note:** If the switch had other licenses on it beforehand, they will now show as `invalid` - this is expected as the serial no longer matches. If you ever decide to revert the switch, the original licenses will become `active` again once the serial is reverted to stock.
If everything looks good, write mem and the licensing is finished:
If you want to revert the switch to its original serial and license ID (for instance, if you sell it), that's quite easy. First, get the serial number from your switch. It should be on a sticker on the bottom of the unit. Then just use the commands we used earlier, but now using your actual serial. Make sure the capitalization matches what is on your switch!
Once the switch reboots and has a new serial, you need to delete the licenses you loaded from this guide. Do not skip this! They will be `invalid` after changing the serial back.
```
enable
#if you had no previous licenses from before this guide:
license delete unit 1 all
#you're done
#If you have previous licenses from before this guide you want to keep:
#list the licenses:
show license
#now delete each of my licenses (they should be the ones showing invalid)
#replace X with the number of the license in the list you want to delete:
It now has the stock license ID and serial, and the licenses have been removed. The output of `show license` should be empty (unless you previously had licenses from before this guide, in which case they should now show valid).
Q: Since all the switches in a stack would have the same license and serial after this procedure, would this cause issues?
A: No - stacking works perfectly. The License and Serial ID are only used for licensing. The switch and stack is totally unaware of them. Stacking uses each switch base MAC address to keep track of stack members, and the MAC is unmodified.
**Note:** The ICX6650 does not support stacking anyhow