[OLSR-users] WLAN Router with two WLAN interfaces - route flapping issue

[Lorenz Schori]

hi rolf

in freifunk you have the option to avoid certain nodes from beeing  
neigbhours by adding an olsr-filter (admin->olsr). i suggest you to  
enter the ip adress of the interface of the WRAP which you don't want  
to use as a hop into the olsr-filter field of nearby freifunk nodes.

behind the scene freifunk just adds an iptable entry. so you might  
want to turn the tables and just filter the problematic ips on an  
interface of the WRAP (centrally and better maintainable).

cheers
lorenz


Am 05.01.2007 um 09:41 schrieb Rolf Schärer:

> Hi group,
>
> We discovered the following issue running olsr on a WRAP board  
> (www.pcengines.ch) with two WLAN interfaces and one Ethernet  
> interface:
>
> Everything works ok if the other olsr-enabled WLAN routers (mostly  
> Linksys WRT54G's running a Freifunk Firmware) can only connect to  
> one of the WLAN interfaces of the WRAP board. Trouble starts if the  
> other routers connect to two WLAN interfaces...
> E.g. the default-route, announced by the WRAP board, is flapping  
> between the two interfaces. This behaviour is an effect of the Link  
> Quality Extension - if it is turned off on every router, the  
> routing is based on hop counts and behaves ok.
>
> My question is, whether somebody on this list has discovered the  
> same problems and if, what the solution was (if there's any!)
>
> Thanks a lot.
> Take care,
> Rolf
>
> More Infos:
> ===========
> We're running the following olsr version:
>
>  *** olsr.org - 0.4.10 ***
>  Build date: Jan 18 2006
>  http://www.olsr.org
>
> And the configuration file:
> DebugLevel              0
> IpVersion               4
> AllowNoInt              yes
> Pollrate                0.1
> TcRedundancy            2
> MprCoverage             7
> LinkQualityFishEye      1
> LinkQualityWinSize      100
> LinkQualityDijkstraLimit 0 5.0
> Hna4
> {
>         10.248.251.64 255.255.255.224
>         10.248.251.96 255.255.255.224
> }
> LoadPlugin "olsrd_nameservice.so.0.2"
> {
>         PlParam "name"          "KSSG2"
>         PlParam "hosts-file"    "/rw/var/hosts"
>         PlParam "suffix"        ".olsr"
> }
> LoadPlugin "olsrd_txtinfo.so.0.1"
> {
>         PlParam "Accept" "127.0.0.1"
> }
> LoadPlugin "olsrd_httpinfo.so.0.1"
> {
>         PlParam "Port" "81"
>         PlParam "Host" "127.0.0.1"
>         PlParam "Net" "0.0.0.0 0.0.0.0"
> }
> IpcConnect
> {
>         MaxConnections  1
>         Host            127.0.0.1
>         Net 172.16.0.0 255.255.255.0
> }
> LinkQualityLevel 2
> UseHysteresis no
> Interface "eth0" "ath0" "ath1"
> {
>         HelloInterval           6.0
>         HelloValidityTime       108.0
>         TcInterval              4.0
>         TcValidityTime          324.0
>         MidInterval             18.0
>         MidValidityTime         324.0
>         HnaInterval             18.0
>         HnaValidityTime         108.0
> }
> _______________________________________________
> olsr-users mailing list
> (spam-protected)
> https://www.olsr.org/mailman/listinfo/olsr-users

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