<div>i think should work well<br></div><div><br></div><div>regards Markus</div><br><div class="gmail_quote">On Mon, Mar 15, 2010 at 4:02 PM, ZioPRoTo (Saverio Proto) <span dir="ltr"><<a href="mailto:zioproto@gmail.com">zioproto@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hello,<br>
<br>
I'm using OLSR for something not usual.<br>
<br>
I'm using OLSR to route traffic inside a VPN Overlay network. I'm<br>
implementing a theoretical work to write a scientific paper, I don't<br>
just need things to work, but I need to be exactly sure of what<br>
happens in the network.<br>
<br>
I have basically no packet loss on my VPN links, so all links are ETX<br>
= 1. I don't use the hysteresis because I know that code is not well<br>
tested. So I'm using the default configuration file shipped with<br>
olsr-0.5.6.r8, basically specifing just the network interface where<br>
olsr must run.<br>
<br>
Now when a generic node "A" wants to send traffic to node "B" there<br>
might be two different paths with extactly the same number of hops. If<br>
all links are ETX = 1 it is like hopcount.<br>
Now for my experiments to be rigorous I need to be extremely sure<br>
about what path OLSR will choose to route the traffic, even if there<br>
are some "same cost" paths.<br>
<br>
To avoid "same cost paths" my idea is to use the LinkQualityMult in<br>
the config to put a little "noise" in the links so that there are no<br>
links with exactly the same cost. Using:<br>
<br>
LinkQualityMult default RANDOM<br>
<br>
Where RANDOM is a number very close to 1 (between 0.95 and 1.05), and<br>
of couse this number is different in the configuration of every node,<br>
I should have unique cost paths ...<br>
<br>
Do you think this can work ?<br>
Anybody has a better suggestion to solve this problem ?<br>
<br>
thanks ! :)<br>
<br>
Saverio<br>
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