Connection slowdown on WiFI when other devices are using LAN from the same router, is this normal?

dhruv990 · May 11, 2016

Hi,

So I have one computer thats connected to my wifi enabled router via LAN. While an upload is going on that computer my computer (connected via WiFi) gets a significantly low internet speed and really high pings on game servers. Is this normal?

Also if I connect multiple devices to the wifi and one of them is downloading something will the speed being received on the other devices be reduced? I ask because Ive seen this happening even when I'm connected via WiFi and the other devices are connected to a second router (acting as an Access Point) which is connected to my primary router.

So what could be wrong? Is my primary router in its last days?

Thanks for the help

EDIT: It gives really high ping in general. If I'm the only one connected and using the router i get a ping of 45 ms on speedtest, if other devices are connected ping ranges from 70 all the way to 400.

nigelivey · May 11, 2016

How have you set up the second router (AP)??

dhruv990 · May 11, 2016

nigelivey :

In the same way I would've done if I had connected a router to an ADSL only modem, its a tp link router so I followed its ADSL modem connection instructions. Although Ive made sure that its channel is seperate from my primary routers' channel.

nigelivey · May 11, 2016

Cabled from lan port to lan port? Disabled DHCP, disabled firewall or does the router have an AP "mode"

dhruv990 · May 11, 2016

nigelivey :

nigelivey · May 11, 2016

dhruv990 :

nigelivey :

You are double "NAT"ing the connection, go LAN to LAN

dhruv990 · May 11, 2016

nigelivey :

dhruv990 :

I'm afraid I dont follow, If I connect the modems lan to the lan of the router how will i get the internet? Also this problem only occurred in the past few days faced no such problem before.

nigelivey · May 11, 2016

dhruv990 :

nigelivey :

If you go Router2 WAN ----------Router1 LAN Router1 WAN ------ISP, traffic from the LAN on Router2 is natted as it passes through the Router2 WAN and is natted again as it passes through Router1. This create a whole world of pain. (Google it). What you need to do is give Router2 a fixed IP address on the same subnet as Router1. Disable firewall and DHCP on Router2 and connect LAN to LAN. This then treats Router2 as a switch and Access Point, connections are then just natted on Router1.

dhruv990 · May 12, 2016

nigelivey :

dhruv990 :

Alright, Ill try it out. Is there any guide that can help me get this done. Also it wont limit the number of devices I can use right, hopefully expand it? I have assigned a fixed IP to the router already my main router is 192.168.1.1 and the other is somewhere around 14 does that work?

PS We have made a really terrible mess of this entire quote thing

nigelivey · May 12, 2016

dhruv990 :

nigelivey :

dhruv990 :

Alright, Ill try it out. Is there any guide that can help me get this done. Also it wont limit the number of devices I can use right, hopefully expand it? I have assigned a fixed IP to the router already my main router is 192.168.1.1 and the other is somewhere around 14 does that work?

PS We have made a really terrible mess of this entire quote thing

Yes as long as you can remember the IPs for admin thats fine. The limit on IP addresses will be 256 but IP x.x.x.0 is the network address and x.x.x.255 is the broadcast address so usable is 254. All addressing will be handled by the first router through DHCP. All you have done is add a layer 2 switch and an Access Point (which is also layer 2).

dhruv990 · May 13, 2016

nigelivey :

dhruv990 :

nigelivey :

Yes as long as you can remember the IPs for admin thats fine. The limit on IP addresses will be 256 but IP x.x.x.0 is the network address and x.x.x.255 is the broadcast address so usable is 254. All addressing will be handled by the first router through DHCP. All you have done is add a layer 2 switch and an Access Point (which is also layer 2).

Ok I did as instructed, good news the secondary router is working better than before, bad news is that the primary router seemed fixed only for an hour or so, ping spikes are back on it.

nigelivey · May 13, 2016

This thread is so long I'm going to ask the same questions again I expect. When you test the ping, who are you sending it to? Does it only occur when other devices are on the network? Sorry if I'm repeating myself, would like to help you get to the bottom of this.

dhruv990 · May 14, 2016

nigelivey :

I use speedtest.net to test my connectivity. It sends a request to a nearby server in my city to check for connection. If I use a 3g connection to the same server I get a ping of 30ms, but when I use my wifi I get anywhere from 70ms to 400ms. Using the second router (after I set it up the way you told me to) the same test returns a ping of 44ms.

nigelivey · May 14, 2016

Open a command prompt and type "ping 8.8.8.8 - t" without the ""
Try it on both connections. To stop it and to see the stats just type ctrl + c.

dhruv990 · May 14, 2016

nigelivey :

With wifi of primary router:

Pinging 8.8.8.8 with 32 bytes of data:
Reply from 8.8.8.8: bytes=32 time=204ms TTL=47
Reply from 8.8.8.8: bytes=32 time=120ms TTL=47
Reply from 8.8.8.8: bytes=32 time=225ms TTL=47
Reply from 8.8.8.8: bytes=32 time=277ms TTL=47
Request timed out.
Reply from 8.8.8.8: bytes=32 time=117ms TTL=47
Reply from 8.8.8.8: bytes=32 time=128ms TTL=47
Reply from 8.8.8.8: bytes=32 time=117ms TTL=47
Reply from 8.8.8.8: bytes=32 time=117ms TTL=47
Reply from 8.8.8.8: bytes=32 time=116ms TTL=47
Reply from 8.8.8.8: bytes=32 time=113ms TTL=47
Reply from 8.8.8.8: bytes=32 time=117ms TTL=47
Reply from 8.8.8.8: bytes=32 time=114ms TTL=47
Reply from 8.8.8.8: bytes=32 time=122ms TTL=47
Reply from 8.8.8.8: bytes=32 time=238ms TTL=47
Reply from 8.8.8.8: bytes=32 time=125ms TTL=47
Reply from 8.8.8.8: bytes=32 time=116ms TTL=47
Reply from 8.8.8.8: bytes=32 time=177ms TTL=47
Reply from 8.8.8.8: bytes=32 time=132ms TTL=47

With wifi of secondary router:

Pinging 8.8.8.8 with 32 bytes of data:
Reply from 8.8.8.8: bytes=32 time=142ms TTL=47
Reply from 8.8.8.8: bytes=32 time=200ms TTL=47
Reply from 8.8.8.8: bytes=32 time=163ms TTL=47
Reply from 8.8.8.8: bytes=32 time=221ms TTL=47
Reply from 8.8.8.8: bytes=32 time=114ms TTL=47
Reply from 8.8.8.8: bytes=32 time=114ms TTL=47
Reply from 8.8.8.8: bytes=32 time=114ms TTL=47
Reply from 8.8.8.8: bytes=32 time=114ms TTL=47
Reply from 8.8.8.8: bytes=32 time=115ms TTL=47
Reply from 8.8.8.8: bytes=32 time=138ms TTL=47
Reply from 8.8.8.8: bytes=32 time=114ms TTL=47
Reply from 8.8.8.8: bytes=32 time=116ms TTL=47
Reply from 8.8.8.8: bytes=32 time=114ms TTL=47
Reply from 8.8.8.8: bytes=32 time=118ms TTL=47
Reply from 8.8.8.8: bytes=32 time=124ms TTL=47
Reply from 8.8.8.8: bytes=32 time=113ms TTL=47
Reply from 8.8.8.8: bytes=32 time=113ms TTL=47
Reply from 8.8.8.8: bytes=32 time=113ms TTL=47
Reply from 8.8.8.8: bytes=32 time=114ms TTL=47
Reply from 8.8.8.8: bytes=32 time=117ms TTL=47
Reply from 8.8.8.8: bytes=32 time=114ms TTL=47
Reply from 8.8.8.8: bytes=32 time=114ms TTL=47
Reply from 8.8.8.8: bytes=32 time=114ms TTL=47
Reply from 8.8.8.8: bytes=32 time=114ms TTL=47
Reply from 8.8.8.8: bytes=32 time=114ms TTL=47

nigelivey · May 14, 2016

That my friend is pretty poor from both routers. Where r u? I'm in Europe and my ping to Google public dns (8.8.8.8) is around 30ms. Do me another favour in cm type "tracert 8.8.8.8" let's see how many hops there are and where the latency is.

dhruv990 · May 14, 2016

nigelivey :

I live in India.

Tracing route to google-public-dns-a.google.com [8.8.8.8]
over a maximum of 30 hops:

1 5 ms 3 ms 3 ms 192.168.1.1
2 54 ms 50 ms 52 ms abts-north-static-***.***.***.***.airtelbroadband.in [***.***.***.**]
3 * *

nigelivey · May 14, 2016

dhruv990 :

Thats not a completed trace, you will need to let it run longer or did you cut the output?

dhruv990 · May 15, 2016

nigelivey :

dhruv990 :

Thats not a completed trace, you will need to let it run longer or did you cut the output?

Ok, how long?

nigelivey · May 15, 2016

Until it finishes!

dhruv990 · May 15, 2016

nigelivey :

1st Trace:

Tracing route to google-public-dns-a.google.com [8.8.8.8]
over a maximum of 30 hops:

1 1 ms 1 ms <1 ms 192.168.1.1
2 51 ms 44 ms 43 ms abts-north-static-***.***.***.***.airtelbroadband.in [***.***.***.**]
3 * * * Request timed out.
4 * 44 ms 45 ms abts-north-static-085.176.144.59.airtelbroadband.in [59.144.176.85]
5 44 ms 43 ms 43 ms 72.14.205.93
6 44 ms 50 ms 47 ms 66.249.95.106
7 153 ms 100 ms 134 ms 209.85.251.183
8 143 ms 127 ms 128 ms 216.239.63.213
9 115 ms 117 ms 117 ms 216.239.48.47
10 * * * Request timed out.
11 115 ms 122 ms 116 ms google-public-dns-a.google.com [8.8.8.8]

Trace complete.

2nd Trace:

Tracing route to google-public-dns-a.google.com [8.8.8.8]
over a maximum of 30 hops:

1 <1 ms <1 ms 3 ms 192.168.1.1
2 49 ms 83 ms 119 ms abts-north-static-***.***.***.***.airtelbroadband.in [***.***.***.**]
3 * * * Request timed out.
4 * 44 ms 43 ms abts-north-static-085.176.144.59.airtelbroadband.in [59.144.176.85]
5 44 ms 43 ms 43 ms 72.14.205.93
6 46 ms 45 ms 44 ms 66.249.95.106
7 88 ms 88 ms 86 ms 209.85.251.183
8 126 ms 127 ms 126 ms 216.239.63.213
9 116 ms 118 ms 118 ms 216.239.48.47
10 * * * Request timed out.
11 135 ms 118 ms 116 ms google-public-dns-a.google.com [8.8.8.8]

Trace complete.

nigelivey · May 16, 2016

Unfortunately the bulk of your latency is out of your control, I would imagine the 216.x.x.x addresses are the undersea link, there are also a lot of hops through ISPs etc. I don't think this is something you can improve.

dhruv990 · May 17, 2016

nigelivey :

I can shout at my ISP. So it is a problem with the isp then?

Connection slowdown on WiFI when other devices are using LAN from the same router, is this normal?

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