I have a single WM3700/RFS7000 controller with 36 - 4750/71XX Access Points. I recently upgraded from 184.108.40.206 to 220.127.116.11 and subsequently from 18.104.22.168 to 22.214.171.124. Since the upgrade, everything appears to be working as expected, however, I have found that all of our wireless printers are now experiencing issues communicating. They are all connected on the 2.4GHz\802.11bgn. Pinging the printers yields extremely long response times and even drops even though RF quality is great. We didn't experience this issue prior to updating. I've upgraded firmware on the printers to no avail. I've reset our Smart-RF and WIPS Policies as well with no luck. Has anyone else seen this kind of activity after upgrading? Any help or insight is greatly appreciated!