Need help diagnosing network problem
Hi, I recently "upgraded" my broadband connection, and it seems to no longer work properly. I am having trouble identifying the source of the problem, so I'd appreciate any help.
I'm using Ubuntu 11.04, but the same problems are present on an older version on my other laptop, and with all probability on my roommate's XP machine (so, it is likely not caused by Ubuntu). The problems only appeared after "upgrading" the connection to 60 Mbit/6 Mbit. The provider is UPC and the new modem (and probable source of problem) is a "Cisco EPC3925 EuroDocsis 3.0 2-PORT Voice Gateway". I am connected to this modem through a hub and a very long cable (40m), which may contribute to the issues (but worked fine before).
The symptoms are:
Websites do not load half of the time, or do not load entirely (often, part of an image is missing, or the whole page is cut halfway down and some of the elements or text don't load). Bigger, complicated sites seem to cause problems more often.
Small files (like torrents) require several tries before they download - the failed attempts do not even start.
Large files (direct downloads) always stop after downloading several megabytes, although the exact number seems random.
Torrents seem to download fine, maybe a little bit slower - I'm assuming this is because the client compensates for any failed attempts and the files actually transferred are small pieces.
Please let me know if you have any ideas what could cause this or how to fix it. Also, if I can provide any additional information. Thanks in advance!