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Intermitent Connection When Modem Connected to Router


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#1 lechols

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Posted 01 October 2014 - 08:20 AM

Hi Everyone,

 

I am having a very strange probelm with my modem/router setup.  I'm using a Thomson DCM476 modem and a Netgear N600 router.

 

The Problem:

When the modem is directly connected to a PC, download speeds are as expected.  When the modem is connected to the router, download speeds are intermitent.  Sometime it's fine but sometimes it's extremely slow.  This is even for PCs that are hardwired to the router.

 

What I've Tried:

- I've been through 2 other routers because I thought something was wrong with them.  This Netgear is the third router. 

 

- I've tried changing to a static DNS server with the same address that my ISP uses.  This seemed to work for a while but then it didn't.

 

- I've cloned the MAC address.  Nothing changed.

 

- I've changed the MTU size.  Nothing

 

- Finally I called my ISP and had them send over a new modem.  This worked for a week then it went right back to slowing down again.

 

What I Haven't Explored

- At one point there was a secod line coming into the house by a different ISP.  These problems started when we closed that account and they removed the line.

 

Does anyone have any ideas?

 

Thanks so much,

Lisa

 



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#2 Wand3r3r

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Posted 01 October 2014 - 10:49 AM

With the router connected do a tracert yahoo.com and post the results for review. 

Go to speedtest.net and run a broadband test and post the results also.

 

You will want to do these tests when you are experiencing the slow speeds.



#3 lechols

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Posted 01 October 2014 - 05:10 PM

Hi Wand3r3r,

 

This is my tracert results:

 

Tracing route to yahoo.com [206.190.36.45]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  192.168.1.1
  2  1616 ms  1780 ms  2231 ms  10.124.107.1
  3  2265 ms  2106 ms     *     209.148.245.153
  4     *        *     2174 ms  so-5-0-3.gw02.mtnk.phub.net.cable.rogers.com [66
.185.81.129]
  5  2222 ms  2720 ms  2785 ms  ae0_2110-bdr04-tor.teksavvy.com [69.196.136.36]

  6     *        *     1966 ms  xe-0-0-0_0-bdr01-nyc.teksavvy.com [206.248.155.9
8]
  7  2377 ms     *     2151 ms  nyiix.bas1-m.nyc.yahoo.com [198.32.160.121]
  8     *        *        *     Request timed out.
  9  1755 ms  1502 ms  1470 ms  ae-4.pat2.che.yahoo.com [216.115.101.145]
 10  1621 ms  1804 ms  1988 ms  ae-5.pat2.dnx.yahoo.com [216.115.96.55]
 11     *        *        *     Request timed out.
 12  3090 ms  3026 ms  2645 ms  ae-0.msr1.gq1.yahoo.com [66.196.67.1]
 13  1441 ms  1317 ms  2253 ms  xe-10-1-1.clr1-a-gdc.gq1.yahoo.com [67.195.0.25]

 14  2402 ms  2284 ms  2589 ms  et-18-1.fab3-1-gdc.gq1.yahoo.com [67.195.1.81]
 15  2897 ms  2854 ms  2791 ms  po-11.bas1-7-prd.gq1.yahoo.com [206.190.32.17]
 16     *        *     2484 ms  ir1.fp.vip.gq1.yahoo.com [206.190.36.45]

Trace complete.

 

The speedtest.net test yielded the following:

 

Ping - 504ms, Download - Mbps, Upload - 0.12Mbps

 

Thanks for your help with this.



#4 lechols

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Posted 01 October 2014 - 05:11 PM

Sorry that speedtest was

 

Ping - 504ms, Download - 5.80 Mbps, Upload - 0.12Mbps



#5 lechols

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Posted 02 October 2014 - 06:54 AM

Can anyone help with this?



#6 CaveDweller2

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Posted 02 October 2014 - 02:25 PM

call your ISP, ask for a tech to come out and test your equipment and lines. be nice about it. They will probably have to run tests while on the phone, just keep calling back if they are unwilling to send a tech the first time.

 

The above tracert and speed test was with the router connected? 


Hope this helps thumbup.gif

Associate in Applied Science - Network Systems Management - Trident Technical College


#7 lechols

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Posted 02 October 2014 - 02:51 PM

Hi CaveDweller2,

 

Yes the above test was with the router connected.

 

I spent a long time on the phone with my ISP this morning.  We did a bunch of speed tests in a variety of configurations.  When the modem is directly connected to a PC there is no problem and thus they conclude there is nothing wrong with the line or the modem. 

 

We changed the DNS server in the router to 8.8.8.8 - google's server -  and the problem was resolved until we loaded the router with tasks and ran another test.  The ping test was slow.  They think the problem is with the router.

 

I've been on with the router tech support people and we've changed a bunch of settings and still there is a problem.  Could it be that the modem is not communicating with the router properly?  This is the 3rd brand new router that we're using.  Each time we use a new ethernet cable and still there is an issue. 

 

Also, the problem is sporadic.  Sometimes it works fine and sometimes it doesn't and there's no pattern. 

 

I really don't know what else to do



#8 CaveDweller2

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Posted 02 October 2014 - 03:57 PM

What speed package or tier do you have from your ISP? How loaded down was your browser when you did the speed test? And what did you have open? Is there more than one PC in the house? If so, are all of them slow?

 

To be honest I have never heard of a working router out of the box, no settings changed, having an issue talking with the modem.


Hope this helps thumbup.gif

Associate in Applied Science - Network Systems Management - Trident Technical College


#9 lechols

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Posted 02 October 2014 - 06:20 PM

We have the mid tier speed package from the ISP.  They concur that the ping test is extremely slow.  We haven't made any changes to the package whem we started noticing the problem.

 

There are 3 pcs hard wired to the router.  All of them have the same problem.  There are 3 or 4 other devices that use the wireless connection and they are affected as well.

 

Where would be a logical place to start?  We've replaced the modem and the routers.  Should we try a different ISP all together?



#10 lechols

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Posted 02 October 2014 - 06:21 PM

When we did the speedtest, I had 2 youtube videos playing on 2 differnent PCs and the third ran the speedtest.



#11 lechols

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Posted 02 October 2014 - 06:24 PM

I just ran another speedtest and with nothing else making demands on the router the ping took 663ms.



#12 CaveDweller2

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Posted 02 October 2014 - 08:49 PM

Ok they agree your pings are high but what did they say about the speed?

 

I use OpenDNS servers for my DNS -  208.67.222.222  & 208.67.220.220


Hope this helps thumbup.gif

Associate in Applied Science - Network Systems Management - Trident Technical College





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