Wifi network 802.11g: latency on LAN, no problem on WAN

#1 (**permalink**) 09-03-2011, 10:46 PM

Hello everyone,

I have a 802.11g wifi network (2 computers + a tv with on board the wifi
interface) managed by a wifi router Netgear DG834G ADS2L+ with
WPA2-PSK-AES encryption (nominal bandwidth offered by the ISP is 10 Mbps
downlink and 1 Mbps uplink) which has a big latency among computers on
the LAN (except to the router).
Note that I also tried to put the PC in the same room

In practice, the ping to a site (es.www.google.it) takes less than among
computers on the LAN.
The network cards support all the "g" standard (also "n" the tv one),
the router is set to "g", and there isn't any signal interference
because I download very fast on the internet side.

The problem is the file sharing ane even worse the streaming video among
LAN computers and tv!

Examples of ping from computer 192.168.0.4:

1) To router (ok)

Pinging 192.168.0.1 with 32 bytes of data:
Reply from 192.168.0.1: bytes = 32 time = 1ms TTL = 64
Reply from 192.168.0.1: bytes = 32 time = 1ms TTL = 64

2) To google (ok)

Www.l.google.com Pinging [209.85.148.103] with 32 bytes of data:
Reply from 209.85.148.103: bytes = 32 time = 34ms TTL = 54
Reply from 209.85.148.103: bytes = 32 time = 35ms TTL = 54
Reply from 209.85.148.103: bytes = 32 time = 34ms TTL = 54
Reply from 209.85.148.103: bytes = 32 time = 35ms TTL = 54

3) To another computer or tv (latency)

Pinging 192.168.0.2 with 32 bytes of data:
Reply from 192.168.0.2: bytes = 32 time = 53ms TTL = 64
Reply from 192.168.0.2: bytes = 32 time = 104ms TTL = 64
Reply from 192.168.0.2: bytes = 32 time = 104ms TTL = 64
Reply from 192.168.0.2: bytes = 32 time = 104ms TTL = 64

Any ideas? One hypothesis is of course to get rid of the "g" router and
going for the "n" one

Thanks,
Luiss

#2 (**permalink**) 09-04-2011, 08:56 AM

> Hello everyone,
>
> I have a 802.11g wifi network (2 computers + a tv with on board the wifi
> interface) managed by a wifi router Netgear DG834G ADS2L+ with
> WPA2-PSK-AES encryption (nominal bandwidth offered by the ISP is 10 Mbps
> downlink and 1 Mbps uplink) which has a big latency among computers on
> the LAN (except to the router).
> Note that I also tried to put the PC in the same room
>
> In practice, the ping to a site (es.www.google.it) takes less than among
> computers on the LAN.
> The network cards support all the "g" standard (also "n" the tv one),
> the router is set to "g", and there isn't any signal interference
> because I download very fast on the internet side.
>
> The problem is the file sharing ane even worse the streaming video among
> LAN computers and tv!
>
> Examples of ping from computer 192.168.0.4:
>
> 1) To router (ok)
>
> Pinging 192.168.0.1 with 32 bytes of data:
> Reply from 192.168.0.1: bytes = 32 time = 1ms TTL = 64
> Reply from 192.168.0.1: bytes = 32 time = 1ms TTL = 64
>
> 2) To google (ok)
>
> Www.l.google.com Pinging [209.85.148.103] with 32 bytes of data:
> Reply from 209.85.148.103: bytes = 32 time = 34ms TTL = 54
> Reply from 209.85.148.103: bytes = 32 time = 35ms TTL = 54
> Reply from 209.85.148.103: bytes = 32 time = 34ms TTL = 54
> Reply from 209.85.148.103: bytes = 32 time = 35ms TTL = 54
>
> 3) To another computer or tv (latency)
>
> Pinging 192.168.0.2 with 32 bytes of data:
> Reply from 192.168.0.2: bytes = 32 time = 53ms TTL = 64
> Reply from 192.168.0.2: bytes = 32 time = 104ms TTL = 64
> Reply from 192.168.0.2: bytes = 32 time = 104ms TTL = 64
> Reply from 192.168.0.2: bytes = 32 time = 104ms TTL = 64
>
>
> Any ideas? One hypothesis is of course to get rid of the "g" router and
> going for the "n" one
>
> Thanks,
> Luiss
You are using Cifs/SMB for sharing files in your 192. ... home
network?

This is very slow with great overheat and cannot use the max power
of a connection.

--
MfG Dieter

#3 (**permalink**) 09-04-2011, 05:10 PM

Luiss wrote:
> Hello everyone,
>
> I have a 802.11g wifi network (2 computers + a tv with on board the wifi
> interface) managed by a wifi router Netgear DG834G ADS2L+ with
> WPA2-PSK-AES encryption (nominal bandwidth offered by the ISP is 10 Mbps
> downlink and 1 Mbps uplink) which has a big latency among computers on
> the LAN (except to the router).
> Note that I also tried to put the PC in the same room
>
> In practice, the ping to a site (es.www.google.it) takes less than among
> computers on the LAN.
> The network cards support all the "g" standard (also "n" the tv one),
> the router is set to "g", and there isn't any signal interference
> because I download very fast on the internet side.
>
> The problem is the file sharing ane even worse the streaming video among
> LAN computers and tv!
>
> Examples of ping from computer 192.168.0.4:
>
> 1) To router (ok)
>
> Pinging 192.168.0.1 with 32 bytes of data:
> Reply from 192.168.0.1: bytes = 32 time = 1ms TTL = 64
> Reply from 192.168.0.1: bytes = 32 time = 1ms TTL = 64
>
> 2) To google (ok)
>
> Www.l.google.com Pinging [209.85.148.103] with 32 bytes of data:
> Reply from 209.85.148.103: bytes = 32 time = 34ms TTL = 54
> Reply from 209.85.148.103: bytes = 32 time = 35ms TTL = 54
> Reply from 209.85.148.103: bytes = 32 time = 34ms TTL = 54
> Reply from 209.85.148.103: bytes = 32 time = 35ms TTL = 54
>
> 3) To another computer or tv (latency)
>
> Pinging 192.168.0.2 with 32 bytes of data:
> Reply from 192.168.0.2: bytes = 32 time = 53ms TTL = 64
> Reply from 192.168.0.2: bytes = 32 time = 104ms TTL = 64
> Reply from 192.168.0.2: bytes = 32 time = 104ms TTL = 64
> Reply from 192.168.0.2: bytes = 32 time = 104ms TTL = 64
>
>
> Any ideas? One hypothesis is of course to get rid of the "g" router and
> going for the "n" one
>
> Thanks,
> Luiss

To get that kind of delay, you'd need a Virtual Private Network (VPN) going
out onto the actual internet, then coming back or something. In other words,
watch your WAN light, and see whether your attempts to ping the high latency
local computer, are actually going out over the Internet.

Paul