[Olsr-users] OLSR topology and VPN links

[Henning Rogge]

On Fri, 26 Aug 2011 13:30:34 ZioPRoTo (Saverio Proto) wrote:
> > If you run the etxff_eth metric and tag all VPN links locally as "mode
> > ether" you can recognize VPN links because of their ETX cost 0.1.
> > 
> > Only perfect (no packet loss) links tagged by both sides "mode ether" can
> > have this cost.
> 
> sorry for very late answer.
> 
> At Ninux we have the very same issue, with the only difference that we
> use tinc-vpn.
> 
> To avoid VPN links and use them only when necessary we use
> LinkQualityMult. Here the view of the links from our central VPN
> server.
> 
> svn ~ # wget -q http://127.0.0.1:2006/links -O -
> Table: Links
> Local IP        Remote IP       Hyst.   LQ      NLQ     Cost
> 10.0.1.1        10.0.1.50       0.00    0.195   0.195   26.010
> 10.0.1.1        10.0.1.20       0.00    0.195   0.195   26.010
> 10.0.1.1        10.0.1.11       0.00    0.195   0.195   26.010
> 10.0.1.1        10.0.1.53       0.00    0.195   0.195   26.010
> 10.0.1.1        10.0.1.30       0.00    0.195   0.195   26.010
> 10.0.1.1        10.0.1.33       0.00    0.195   0.195   26.010
> 10.0.1.1        10.0.1.77       0.00    0.195   0.195   26.010
> 10.0.1.1        10.0.1.8        0.00    0.195   0.195   26.010
> 10.0.1.1        10.0.1.177      0.00    0.195   0.172   29.557
> 10.0.1.1        10.0.1.120      0.00    0.195   0.195   26.010
> 10.0.1.1        10.0.1.16       0.00    0.195   0.195   26.010
> 10.0.1.1        10.0.1.155      0.00    0.195   0.195   26.010
> 10.0.1.1        10.0.1.51       0.00    0.195   0.195   26.010
> 10.0.1.1        10.0.1.52       0.00    0.195   0.195   26.010
> 10.0.1.1        10.0.1.13       0.00    0.195   0.195   26.010
> 
> Once all VPN links are ETX above 25, the code of the map server just
> does not draw links with a ETX > 25
OLSR will just ignore your link if the LQ or NLQ drops below 0.1

Henning Rogge
-- 
Diplom-Informatiker Henning Rogge , Fraunhofer-Institut für
Kommunikation, Informationsverarbeitung und Ergonomie FKIE
Kommunikationssysteme (KOM)
Neuenahrer Straße 20, 53343 Wachtberg, Germany
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