[OLSR-users] network problems

[Sven-Ola Tuecke]

Hi,

well, normally the links are simply bad if you experience this. An LQ of ~ 
0.8 means, you will loose around 25% of all packets (with frag=256!). Even 
if wlan layer will do retries, such link may be usable for short ssh 
sesssions but for nothing else.

Verify by switching off olsrd and type in some manual routes. If things are 
better now, you have a olsrd problem. Otherwise try better antennas, other 
channels, other devices, more intermediate hops, [Insert your favorite link 
technology here]...

I personally think, no direct link which does not reach at least 32kbyte/sec 
for 15 minutes is unusable. For ssh sessions you may try to lower the MTU on 
the originators wlan interface also.

You do not use NAT on the wlan interfaces, do you? Ssh in a box, then check 
with "who". If the IP of the source-box is displayed no NAT is there...

Rgds,
Sven->Ola

"Andrew Hodel" <(spam-protected)> schrieb im Newsbeitrag 
news:(spam-protected)
Our network, with 23 nodes is having serious issues with packet loss
and dying connections on a few nodes.  Regardless of a route change,
should ssh stay connected?  We have rts at 64 and frag set to 256, ssh
last about 3 seconds on any route over 3 hops.  We have tried rate
5.5M fixed to avoid lossy links.  You can't even view 640x480 images
on the web, by the time the image is finished the connection has
dropped and you get 1/3 of it.  LQ on the links is reported as 1 or
.9, at the lowest .8 and these are the links with problems.  Is there
anything I can do to fix this, would hysterisis resolve this?

You can view an image of our network at: http://www.nxwi.com/pa_map.png

Nodes # 17,5,19,6,22,8,and 7 have these problems.  I realize they are
the farthest, however the LQ is .9 or 1.

The hna node is node 1.



Any ideas?



Thanks,
Andrew
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