[OLSR-users] OLSR-0.4.5 and Bridging WDS Interfaces

Andreas Tønnesen (spam-protected)
Mon Jul 5 13:45:13 CEST 2004

Hi again Graeme,

Thanks for the explanation. I know to little about the
hostAP/WDS scheme to draw any conclusions about the
problems... hopefully somebody else on the list knows
more about it?
Anyways, what I can tell you is that different kind
of wierdness could definetly occure when running olsrd
on "non-physical" interfaces :)
My best guess is that the problems are connected to the
special setup, olsrd 0.4.5 has ran for some hours here
now(since I received your first mail) on a small fixed
topology without any strange things happening.
But you assume right about OLSR operation. In a static
network it will work much like any link-state routing
protocol, and in your scenario the routes should be

Hopefully somebody else has some comments on this.


(spam-protected) wrote:
> Hi Andreas
> Well I want to make my wireless routers automatically mesh together when
> they are running HostAP in infrastructure mode. The shell script in question
> runs as a background process and it periodically scans for WDS link status
> and will either add WDS links to bridge interface br0 or delete WDS links from
> br0. The script will also do an ifconfig up or down on a  wlan0wds# link as required.
> The br0 interface carries an IP address like  so all  wireless routers
> are in the subnet.  I  tell OLSR to use the br0 interface only in the
> conf file (no mention of wlan0wds# interfaces there). The script starts up before
> olsr is started and it continues to run in the background as olsr runs.
> So my goal is automatic meshing, rather than mobility (My wireless routers will not
> move around). I saw some comments from you in the list archives that olsr might
> not run happily on a bridged interface due to potential weirdness in assigning a 
> socket to such an interface. I do not now what to expect from OLSR but assume
> it should converge to a steady-state routing solution if the network and wireless
> conditions are pretty stable ( I am mentally think it will be something like OSPF
> as both are link-state routing protocols)
> I appreciate that I may be setting up an unsupported config here, but I just wanted
> your opinion on this. :)
> Best regards
> Graeme
> PS the olsr plugin idea is very cool :)
> 	-----Original Message----- 
> 	From: Andreas Tønnesen [mailto:(spam-protected)] 
> 	Sent: Mon 05/07/2004 09:44 
> 	To: Brown,GN,Graeme,XVR2 BROWNGN R 
> 	Cc: (spam-protected) 
> 	Subject: Re: [OLSR-users] OLSR-0.4.5 and Bridging WDS Interfaces
> 	Hi,
> 	I don't know if I fully understand your setup. You
> 	are adding mobility by adding and removing links
> 	using a script? Or are these links just set up
> 	initially using this script?
> 	If the links are static OLSR should definelty provide
> 	stable routes. In that case, try 0.4.4 and see if it
> 	works better. If it does there probably is a bug in 0.4.5
> 	Please report back.
> 	regards,
> 	Andreas
> 	(spam-protected) wrote:
> 	> Hi
> 	> 
> 	> I am new to using Unik-OLSR and have recently tried release 0.4.5.
> 	> I installed it on 5 wireless router nodes which use HostAP in infrastructure
> 	> mode. Since HostAP is running in infrastructure mode, WDS links are
> 	> formed dynamically which are added to or deleted from a bridge interface
> 	> br0 by a background shell script. I tried to to run OLSR on the br0 interfaces
> 	> using IP addresses in  1.x.y.z/8
> 	> 
> 	> I observed the routing table at a wireless router via
> 	> watch netstat -rn
> 	> 
> 	> All nodes seem to find each other but I did not see routing reach a stable state.
> 	> Routes to Nodes appeared in the routing table for a few seconds, then disappeared
> 	> and re-appeared some seconds later. It gave me the impression that routing never
> 	> converged to a steady state ?? Should I expect OLSR to converge to a steady state
> 	> routing table  for the network ? All 5 wireless routers were stationary, located within the same room and within radio range of each other.
> 	> 
> 	> Best Regards
> 	> 
> 	> Graeme Brown
> 	> 
> 	>
> 	>
> 	> ------------------------------------------------------------------------
> 	>
> 	> _______________________________________________
> 	> olsr-users mailing list
> 	> (spam-protected)
> 	> https://www.olsr.org/mailman/listinfo/olsr-users
> 	--
> 	--
> 	Andreas Tønnesen((spam-protected))
> 	UniK University Graduation Center
> 	University of Oslo
> 	http://www.olsr.org


Andreas Tønnesen((spam-protected))
UniK University Graduation Center
University of Oslo

More information about the Olsr-users mailing list