We are migrating a site from 5508 WLCs with 3502 APs towards a 9800 WLC with 9120 APs. To support a rip and replace scenario we loaded the 5508 with the 8.5MR5ircm image so roaming between the old and new network would be possible. DHCP has been setup with option 60 to send 9120s towards the new controllers, while keeping the 3500s on the old controllers.
Now we have 2 SSID's, 1 open for general use, and 1 corporate SSID with dot1x (EAP-TLS), and the situation is as follows:
Yes, it is. As stated is the roaming working on the open SSID both ways (and the debug messages do confirm this with a correct mobility handoff). For the corporate SSID it's only working from old to new, not from new to old.
It tend out to be a naming mismatch between the profile name on the WLAN ID in the 5508 and the WLAN Profile Name on the 9800. So, make sure they are the same on both sides.
In the 9800 config guide this is now described as follows:
This was not the same sentence as was there when I had this issue, but now it is stated more clear.