I also have this problem. It effects printers, sonos, airplay etc. It seems like the router starts rejecting multicast packets. Cisco support told me it was a switch problem, my switch is a cisco sg100d-08. Anyway I have had this issue at least a hun...
Other issues include not being able to save changes made to the SSL VPN page. and losing https web access to the router. SSL VPN has the problem on the current firmware as well as the previous. The web access problem is new. Get it together Cisco, th...