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

Bruno Randolf (spam-protected)
Mon Jul 5 14:15:16 CEST 2004


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hello!

if i understand your setup coprrectly, you build a bridge with all wds 
interfaces, right?

that means all your nodes are connected on layer 2 (they are in the bridge) 
and can reach each other, even without a routing protocol. therefore it does 
not make any sense (in my opinion) to additionally use a routing protocol, 
thats only useful if you are *not* connected on layer 2.

bruno




On Monday 05 July 2004 13:21, (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
> 1.23.24.25/8  so all  wireless routers are in the 1.0.0.0/8 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 T√łnnesen [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 T√łnnesen((spam-protected))
> 	UniK University Graduation Center
> 	University of Oslo
> 	http://www.olsr.org
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