I'm running 10.10 on a desktop and I have two routers: the first connects to the Internet and serves DHCP addresses to my devices, the second is a WiFi LAN around the house. Both routers run Tomato firmware.
My issue is whenever I play music on my desktop (using MPD/ncmpcpp) or a video (either Totem or VLC) conky reports my upload speed at around 200Kb/s and my WiFi LAN goes down. As soon as I stop MPD or VLC the network comes back up.
How would I go about troubleshooting this?
Edit: interestingly enough, the LAN stays up when I use Skype
Edit 2: after following ijk's suggestion, wireshark show that port 46560 is being flooded. lsof shows that it is pulseaudio:
pulseaudi 2190 jason 39u IPv4 14110 0t0 UDP mybox:56751->188.8.131.52:46560
Seems it is a bug: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/411688
Update The solution, from an admittedly sketchy memory, is to install and open the pulse audio control settings and disable netwrok broadcasting--this will stop pulse flooding your network.