High Latency on secondary router

alasdairt

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Oct 25, 2008
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I have BT Infinity 2 which feeds my "primary" router downstairs. I then run a bunch of Cat5 to my study upstairs from this which feeds into another router in bridge mode then via a wired connection to my PC.

Internet browsing is pretty slow upstairs : speedtest say I'm getting decent DL / UL speeds but a latency of 100-150ms. Is there anything I can do about this or is this just down to signal degradation because of the 40m of cabling.

Ping downstairs aint great but more like 30ms.

Cheers
 
Solution
Ethernet can not really cause latency. Wireless does because data that contains errors is re transmitted which can cause delays. Ethernet is really simplistic. Data is sent and if the remote end detect any errors the data is discarded. The end application must solve this issue of lost data. This is mostly because there is close to no data with errors on ethernet.

Technically the only delay on ethernet is going to be the actual transmission time. It is about 2/3 the speed of light which at the short distances ethernet cable can be is a very tiny fraction of 1ms.

I would run a constant ping to your router. You should always see extremely small 1ms or so numbers.

Even you second router if you are running it in bridge mode...
Ethernet can not really cause latency. Wireless does because data that contains errors is re transmitted which can cause delays. Ethernet is really simplistic. Data is sent and if the remote end detect any errors the data is discarded. The end application must solve this issue of lost data. This is mostly because there is close to no data with errors on ethernet.

Technically the only delay on ethernet is going to be the actual transmission time. It is about 2/3 the speed of light which at the short distances ethernet cable can be is a very tiny fraction of 1ms.

I would run a constant ping to your router. You should always see extremely small 1ms or so numbers.

Even you second router if you are running it in bridge mode should have no effect. This is especially true if you are connecting only using the LAN ports because that is actually a small switch. You also will not be able to detect any delay caused by a switch.

Hard to say you are going to have to do some more testing to see where the delays are happening. Pretty much when you do not have wireless the delays are function of distance or some kind of bottleneck where a device is holding data.
 
Solution