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We are using several computers and a router to connect to a cable modem to our isp. We consistently get surfing problems (in windows, linux and mac computers). When opening a few websites in new tabs, often they never come trough. It gets completely bogged down and I have to click stop for all of them, wait a minute and then refresh them one by one.
Downloading files goes by a few Mb per second, so it is not a speed issue.
It seems that augmenting the number of open connections, or rather the establishing of different new connections in a short time span gives trouble.
I looked on the net and found ways to check if network packet size is to big, as that would lead to lots of resending and adjusting packet size, but that seems to be fine.
Any ideas on how to troubleshoot and pinpoint the cause of this problem?
Btw, for years the helpdesk of our ISP have always had the same answer to all possible problems:
We can't see anything wrong at our end, there must be something wrong with your settings, sir...
needless to say, that helps.
UPDATE:
The results of speedtest.net: Download 28.68 Mb/s, upload 0.64 Mb/s, ping 31ms
The results of pingtest.net : ping 16ms, jitter 1ms, packet loss 0%
But then again, this is an intermittent problem (ah those, divine) and right now it is working all fine. I will run those tests when it is clogging up.
I tried opendns before, since my providers dns has a bad reputation, but that did not resolve the problem.
The router we got from the isp has 4 ports. Some computers are directly on those, and others are behind a second router. Both have the stated problems, so I would rule out our own router...
Personally I feel like it is the provider lacking, but I wonder if this could be measured and diagnosed somehow.
Another update:
It is now 22h, a more busy time for our provider. I noticed some tabs coming up rather slowly, so i decided to run the two tests again. This is what I got:
The results of speedtest.net: Download 2.43 Mb/s, upload 0.06 Mb/s, ping 1087ms
The results of pingtest.net : ping 854ms, jitter 190ms, packet loss 2%
ufotds
Posted 2010-10-10T21:37:55.453
Reputation: 581
28Mb down, what ISP ? Has to be fios or at&t. What kind of router and what has you done to the router? Have you tweaked QOS or anything else in the router ? – Chris – 2010-10-11T00:23:18.687
Mega-BITS, not bytes, and we do pay a whopping 67 euros to this isp each month – ufotds – 2010-10-11T20:13:23.153
bits is generally represented by a small b (mbps), whereas BYTES is represented by a capital B (MB/s). With those results, it's probably mainly your upload that's stuffing it up (and ping). If the upload is really slow it takes longer to request the page and combined with a high ping, you can be waiting a while! – Azz – 2010-10-11T21:32:18.837