[OLSR-users] Routing problems over a long distance

[Harikrishna Natrajan]

hello guys.

first of all, thank u for the wonderful protocol, lot of our development time has been saved for us here in India.

We are having a situation where we have a laptop connecting wirelessly to a wireless node called node 2, from which packets hop to another wireless node called node 1. from there it then hops to a wireless central node called gw which is connecting wired to a debian pc which has an authentication system which allows . all three wireless nodes are 400 metres from each other. sthg like this:

laptop ----- node 2 -------- node 1 ------- gw -------- debian


the nodes are all linksys wrt54gl. only gw ------ debian is wired. all devices other than laptop run olsrd, and the routes are perfect thanks to ur daemon. no missed devices and no loops. node 2 and node 1 and gw all run the Openwrt distro and there are no custom rules that we have added. all firewall rules are OK, since we have tested for that from short distances such as 10 metres or so, where the entire system works perfectly.


here are some issues that we are facing:

1. the laptop can ping upto node1 which is roughly 600 metres away, but cannot ping gw, which is roughly 1000 metres away. it cant ping anything further than that.

2. the traceroute from laptop shows similar results where all packets upto node1 trace properly, but then trace to gw times out even with a timeout of 15 seconds.

3. Traceroutes from node2, node1 and gw all complete properly although with progressive deterioration. e.g. node2 is the slowest and gw is fastest. but as mentioned earlier, traceroute from laptop only goes upto node1. again, i assure u that firewall is proper since the setup works when router are 10 metres apart. i think this is due to some latency and packet loss due to quality.

4. Also if node 2 is brought closer and within the range of gw, so that it is able to skip node1 and build a route directly to gw, then the system works again.

So u see, i just wanted to ask u, what numeric settings shud be played with in olsrd.conf in order to achieve a performance similar to the 10-metre setting, stuff like Hello or RTS or frag or whatever.
 
 				
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