Running 4.1.185 in production with older Spectralink phones (NetLink i340/h340) - all is well. When I upgrade my backup controller to any 4.2 release (4.2.176 is the latest tried), SpectraLinks quit working - "No GW Response". This usually is a multicast issue, but cannot find the problem. Anyone run into this?
BTW, using WiSMs, not WLCs