[PLUG] 3g Wifi router tuning

Mayuresh mayuresh at acm.org
Fri Jun 28 01:42:22 PDT 2013


On Fri, Jun 28, 2013 at 09:19:55AM +0530, Pranav Peshwe wrote:
> Hi Mayuresh,
>                      To begin with, I would suggest quickly replacing the
> router with another one for testing, and verifying, that it is not the
> environment that is causing the drop. I've seen cases, where due to radio
> pollution, WiFi didn't work even over smallest of distances.
>                       If, with similar settings, the other router works
> well, then there is a high chance that your piece has developed an issue.

Here are some more observations:

Unfortunately the fault involves 2 factors - OS and router.

OS: NetBSD
Router: Linksys WRT54GL (used for testing though I need to use Lava for 3G)
Observation: No packet loss despite large time monitoring.

OS: NetBSD
Router: Lava W150
Observation: Packet loss noticed within 20 pings. Over long time it can
range from 15 to 50%.

OS: Linux
No loss with either routers, though tendency to hang the router requiring
power cycle - at least observed with WRT54GL. (One of the long term issues
why I was comfortable after switching to NetBSD. Believe me, I know a
device shouldn't be able to hang the router. But it's a time tested
observation.)


Possibility is either NetBSD iwn driver is faulty (since there is no
packet loss on Linux). OR router is faulty (since NetBSD driver works with
other routers using the same hardware.) OR some of the finer wifi settings
need fine tuning - which is my guess and hope both. Ones I know, like
channel etc. have been tried. (Made channel same as the working one on the
non working one. Made no difference.)

Mayuresh.



More information about the plug-mail mailing list