Bonjour not working with new Cisco Gateway from Shaw
I have a PC running Windows 7 (64 bit version) and a 2nd gen iPad. On the PC, I have AirPrint for Windows, Shairport4w, Calibre (for e-books) and AirVideo Server installed. These used to allow me to print from my iPad to the Samsung ML-1670 connected to my PC, stream videos from my PC to my iPad, play my iPad's music through my PC's speakers (and vice versa through itunes homesharing) and download my PC-hosted e-books to my iPad's Stanza app wirelessly. It was a like a little Bonjour paradise in my house.
Then I upgraded to Shaw's new Broadband 50 internet and accordingly swapped my old SMC gateway for their new Docsis 3-capable Cisco DPC 3825. As soon as my new gateway was installed, all Bonjour-dependent apps ceased to function properly. I can no longer find any of my PC stuff from my iPad. Even my PC's shared iTunes library doesn't show up in my iPad's iPod app anymore. I've disabled all firewalls (even though firewalls should not be causing this issue), restarted PC, iPad and gateway many times, restarted the Bonjour and Airprint services alone, reinstalled Bonjour from the Apple support site, set my PC as the DMZ host in the gateway, disabled WiFi protected mode in the gateway and set the wireless to use G only, and etc, and etc. Never do I see a change. Cisco, Shaw and Apple tech support have all referred me to each other. I am about to give up and get my own wireless router to use instead of the free one Shaw's provided, but thought I'd check here first in case some one else had found a good solution.
A couple of additional clues: my (wired) PS3 can see the DLNA-dependent PS3 media server on my PC fine with the new gateway, and other forums do mention similar issues with a different Linksys router. The solution there was to enable multicast filtering in the router. I have not been able to find this option in the Cisco's settings, but perhaps it's called something else?
iPad 2, iOS 4.3.3