1. Start Extreme Management Center.
2. Change to the Network > Firmware tab.
3. Highlight any firmware that is set for reference other than 18.104.22.168 as that is working.
4. Add a 'v' to the start of the firmware version under the Details window to the right.
5. Click the Save button
For example change: 6.1.1.017 to v6.1.1.017