# 3.3 to 3.5 kills radios? **URL:** https://community.cambiumnetworks.com/t/3-3-to-3-5-kills-radios/53517 **Category:** ePMP **Created:** [October 26, 2017, 7:33pm UTC](https://community.cambiumnetworks.com/t/3-3-to-3-5-kills-radios/53517 "2017-10-26T19:33:05Z") **Posts on this page:** 1 **Showing post:** 9
### Author: ![Au\_Wireless](https://d10gw3vjmzyp8.cloudfront.net/user_avatar/community.cambiumnetworks.com/au_wireless/32/11555_2.png) [@Au\_Wireless](https://community.cambiumnetworks.com/u/Au_Wireless) #### Post date: [October 26, 2017, 11:11pm UTC](https://community.cambiumnetworks.com/t/3-3-to-3-5-kills-radios/53517/9 "2017-10-26T23:11:32Z")
Take a read through this if you have not already: [http://community.cambiumnetworks.com/t5/ePMP-2000-and-1000/Lost-access-to-2000-AP-during-upgrade-to-3-5/m-p/77332#M11545](https://community.cambiumnetworks.com/t/lost-access-to-2000-ap-during-upgrade-to-3-5/52725) I am getting convinced there is an issue with the 2000 AP hardware, firmware 3.5, Netonix switches when the AP has STP turned on. I have three 2000 APs and all three of them I lost control of on the Ethernet side when I tried to upgrade to 3.5.  All three are in Netonix switches and all three use STP.  As a result, I have not upgraded those APs. --- _[View the full topic](https://community.cambiumnetworks.com/t/3-3-to-3-5-kills-radios/53517)._