Let me preface this question by saying that I have many years (over 30) of tech experience, so please keep in mind when responding...thanks. I have a situation whereby, with a single pc on a home network, connected wirelessly to a residential router, the ping time is 20-40ms to google dns server with 1ms to the router/modem and 20-40 through a couple of jumps to the dns server. The second another wireless laptop hits the network, the ping times to the dns server (on either machine) hits 2500-4500ms. I have had several different machines (wired and wireless) on the network in various combinations and all with the same result...one machine 20-40ms to dns. more than one machine 2500 to 4500ms ping time to google dns. There is no second router (however, I have swapped the modem/router with another modem/router...same thing), with and without IP6 enabled, static or dynamic IPs, etc. Pings within the local network are 1-4ms. Any ideas why the ping to the external DNS would increase so much with the additon of another pc to the network? Thanks for any suggestions!
High Ping Latency
- Thread starter rkent_lf
- Start date
You are going to have to test a little more systematically. Wireless can easily cause this problem and is almost impossible to figure out why one machines works and another does not. Still if you ping the router and all is fine and it only happens when you ping a IP outside your house then it is not the wireless.
Pretty much the only things that can cause a delay like that on your internet connection is going to be either some kind of poor internet connection that is impacted by traffic or you might be exceeding your bandwidth.
Try with a single machine on the network and download a file at say 75% or your rate you get from speedtest. Some free game off steam tend to be fine just remember steam users bytes/sec so you need to do the math.
While this is running see if when you ping get problems. Since you are not at maximum it should cause little increase in the ping times. If there are problems it can be that the line is taking some kind of error that is made worse by traffic.
Other than traffic related issues multiple machines should not cause a problem...if they do not cause issues on the lan side. All traffic past the router appears to come from a single machine so it really should not make a difference how many you have behind it.
Now you say you swapped the router. If they are exactly the same brand and firmware levels it may be worth trying a firmware upgrade just to eliminate some bug.
Pretty much the only things that can cause a delay like that on your internet connection is going to be either some kind of poor internet connection that is impacted by traffic or you might be exceeding your bandwidth.
Try with a single machine on the network and download a file at say 75% or your rate you get from speedtest. Some free game off steam tend to be fine just remember steam users bytes/sec so you need to do the math.
While this is running see if when you ping get problems. Since you are not at maximum it should cause little increase in the ping times. If there are problems it can be that the line is taking some kind of error that is made worse by traffic.
Other than traffic related issues multiple machines should not cause a problem...if they do not cause issues on the lan side. All traffic past the router appears to come from a single machine so it really should not make a difference how many you have behind it.
Now you say you swapped the router. If they are exactly the same brand and firmware levels it may be worth trying a firmware upgrade just to eliminate some bug.
Thank you for the suggestions. Yes... two different modem/routers (one provided by the carrier and one aftermarket, different brands), so as to rule out the firmware issue...which are both up to date. As far as the traffic or bandwidth...this is why I stick with "ping" as opposed to saying that my internet was slow. Ping takes up zero bandwidth, thus not a capacity issue. As far as network traffic...doesn't matter when I perform the tests, same result second hop (first being to the router). A single pc (wireless or wired) gets full bandwidth and low ping. Add a pc, all pings go way up. Any other suggestions?
You have to somehow verify that neither pc is causing traffic. I know one I keep off my network a lot will immediately download crap from microsoft the second it finds it can get on the internet.
There is not a lot this can be. If it was some kind of ip conflict or something you would see problems with your lan traffic. This pretty much leaves a issue with the connection or a load problem.
There is not a lot this can be. If it was some kind of ip conflict or something you would see problems with your lan traffic. This pretty much leaves a issue with the connection or a load problem.
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