I am troubleshooting an xbox live connection issue I'm seeing while playing certain games. I started with a wireless network setup, but am reproducing the problem readily now with the xbox connected directly to the modem, so I'm confident this does not concern the router or router settings.
I have a Toshiba PCX2600 cable modem, connected with a medium-sized cable (10-15ft I would guess). When the router was connected, I was getting speedtest results on my laptop of ~15Mbps down / ~1.5Mbps up.
Currently, I am only experiencing the issue playing Halo Reach, specifically when trying to play custom games with other players. I can play matchmaking with minimal issues, only actually dropping every now and then, but when I try to join a custom game party, I seem to only ever last 1 or 2 games before dropping. Often I am dropped while transitioning between the lobby and game-start the very first game after joining a custom game party (please note I am not referring to an actual Xbox Live 'party'). The in-game network checks show green (optimal) across the board.
Other game modes, other games, other forms of network connection (laptop, phone, etc.) do not seem to have similar problems.
What Country/State/Province do you live in? USA / VA
Modem brand & model number: Toshiba PCX2600
Router brand & model number: Xbox connected directly to modem
Network Connection Type: Wired
Things you have tried:
Is UPnP Enabled? N/A
Is NAT Type Open? N/A
Any Error Codes you encounter: no
What type of internet do you have? Cable
Who is your ISP(Internet Service Provider)? Cox
When you run "Test Xbox LIVE connection" what is the exact message shown on screen? Connected
I have Halo Reach installed on the hard drive, and am running from that, so I assume that rules out the possibility of the problem being the game media (I have deleted and re-installed it, experiencing the connection problems both before and after). Is that assumption correct? The next thing I want to try is a newer Xbox (I have one of the launch models). I will request a friend's help in this, but wanted to post here in the meantime. Any ideas?