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Help me eliminate all possibilites with a sloooow network problem

arredondo

arredondo

Senior member
For over three weeks my cable internet access has been dog-slow for 75% of the day (random times it seems). I mean I get at best a .3 MB speed when I'm supposed to get at least 10+ MB speed. ust opening Google.com can take ten seconds or time out.

Speedtest.net reports this slowness during those times, and sister site PingTest.net shows 0% packets lost but a ton of jitter and ping problems (sometimes triple digits). Before the problems, I've had no issue for years. It just started in the middle of a browsing session a few weeks ago there was a new, light rain outside but that may be a coincidence.

I subscribe to Charter Cable for online access. My computer is connected by an ethernet cable, and so is my PS3. A second computer and Kindle connects via WiFi over the network. All experience the lag issue when online. I turn everything off and test each one separately to see if it is one of my devices - it isn't.

I have a Cisco-Linksys WRT160N router and used to have a Motorola SB5100 modem until I upgraded this week to a Motorola SB6120. Besides switching out the modem I also used new ethernet cables but the issue remains, even if I connect directly to the modem instead of going through the router first.

Charter techs have tried to help over the phone and say they see no problem. No service work is being done in my area. A tech came out to my house when it happened to be working fine and he saw no problems (he added weather protection gear to something outside though). The issue came back shortly when he left. At least they crdited the online service charge for the last few weeks.

All of my firewall/virus protection/adware software is in place with no irregularities reported. Is there anything else I can do to isolate the problem?
 
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Hi - looking at this in simple terms: its either your system or theirs (ISP) so unless you have a hub/switch/network locally thats not correct configured or is faulty the chances of multi system all having a network fault at the same time is not high so I guess its the ISP.
I suggest that when this happens you run speedtest.net (maybe others also) and grab screen shots and also a few at times when its ok. log this over 2 weeks and send a email to your ISP and show them the proof, see what they say then.

Another little thought ask the people living around you maybe its a local comms switch issue...
 
My internet is in one of its "working" moods right now. I used that command you linked to (trace route) for data connecting to Google.com. It took 11 hops, and all of the ms speeds are 24 or less (most less than 15). That reflects my normal speeds since SpeedTest.net and Pingtest.net are now showing my normal excellent numbers for ping and jitter.

I'll use trace route again when I have problems and report the results here. Thanks.
 
I took away the router and directly tested with my modem. Tonight the high jitter and ping returned (speeds are high though) so I ran the tracert to google again and it looks like the initial spike is coming from my computer. There are spikes on charter's servers a few hops ahead, but my system had the initial 200+ number.

I've run adware/spyware/virus checks and came up with nothing. I have a new modem and ethernet cable since the problem started, so that's not it. How else can I figure out the cause?
 
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