after an Upgrade from 220.127.116.11 to 18.104.22.168 we have some roaming problems with 7921 phones on the 802.11a network. Only the version of controller software was changed. The running IOS on the catalyst 6513 switches (with 720 Sup with MSFC3 daugtercard) is 12.2(33)SHX4. Could there be a problem with this older IOS?
Thanks for any hints