3xWCS 4404 with 5.0.148 and WCS 5.0.56.
After serveral days, I were not able to connect to the telnet, SSH and webfrontend interfaces on all controllers. I tried management and service-port IPs. But I get ping responses from the interfaces and the Wireless LANs are also working, except the Web Authentication, which is now configured to relay the user to a special url.
In the release notes (http://www.cisco.com/en/US/docs/wireless/controller/release/notes/crn501480.html#wp234299) was a caveat (CSCsi30541), but it occurs when you create a new dynamic interface, which I didn't.
The controllers respond to the WCS, so I were able to reboot them via the WCS. After that the situation is normal, until the next time.
Three weeks ago, I installed 5.0 on one of the three WCS. One week ago, I installed it on the other two. This problem occurs on the first WLC for the second time, so I assume, it can happen again.
Any ideas what could be the reason?