Is that a problem to deploy VoIP on a flexconnect network ? I mean, is there a roaming problem is clients are roaming from 1 flexconnect AP to another flexconnect AP while the WLC is centralized on the HQ ?
Reading the following, it is advised to deploy a local WLC on each branch location ...
WPA2—To improve client roam times, WPA2 introduced key caching capabilities, based on the
IEEE 802.11i specification. Cisco created an extension to this specification called Proactive Key
Caching (PKC). PKC today is supported only by the Microsoft Zero Config Wireless supplicant and
the Funk (Juniper) Odyssey client. Cisco CCKM is also compatible with WPA2.
Remote branch locations requiring predictable, fast roaming behavior in support of applications
such as wireless IP telephony should consider deploying a local WLC (Virtual Controller on UCS
blade or 2500 WLC).