I have the MagentaHomeXL contract with a Speedport W 925V router. I use my connection to play online at Guild Wars 2, and very often (specially in the evening) the online connection starts cutting off every 30-60 seconds, kicking me out of the server. It is OK for browsing the internet, but very frustrating for online gaming.

I did a traceroute, and looks like after the router, all the pakets are lost. (I attach a screenshot of the traceroute)