Re: [B.A.T.M.A.N.] batmand still doesn't start the right way

[rene <batman@absorb.it>]

Hi,

just installed batmand on around ten nodes with multiple interfaces
today. At least four of them faced the described problem (maybe more and
I didn't realized yet), batmand didn't used all recognized interfaces to
send OGMs.
Solution? Killed batman, started batman, killed batman, started batman,
for an incredible amount of times and at some point it started running
the way it should.

But this seems really buggy, nobody else facing this problem?

Regards,
Rene

Axel Neumann wrote:
> Hi rene,
> 
> your interface configuration looks correct, the following may sound weird but 
> I've once observed a similar effect. The following happened:
> 
>  run batman on my notebook on a alias ethernet interface, connected to a small 
> batman testbed - everything fine. Then send the notebook to deep sleep 
> (suspend to disk) and resumed it when coming back the next day. Batman just 
> continued but without any neighbors. Tcpdump showed exactly your 
> observations. It traced the OGMs from the neighbors but not the own ones. I 
> opened debug-level 4 to see whats going on and recognized that the batman on 
> my notebook did broadcast OGM (at least the debug output claimed so) and it 
> also revealed that the daemon received its own OGMs back (and then dropped 
> then). The debug-level-4 then prints something like:
> 
> [   4570480] Received BATMAN packet via NB: 103.130.30.218 , IF: eth3:bmx 
> 103.130.30.218 (from OG: 103.130.30.218, seqno 46443, TTL 50, V 9, UDF 0, IDF 
> 0, DPF 1)
> [   4570480] Drop packet: received my own broadcast (sender: 103.130.30.218)
> 
> So from the notebooks' batmand point of view the OGM is send and received, but 
> its not even shown with tcpdump. I dont remember if the notebooks' batmand 
> received the OGMs from the neighbor (but anyway, a neighbor is not fully 
> accepted until there is a prooven bidirectional communication). 
> I think even restarting the daemon did not help, but what finally helped was 
> to pull the ethernet cable out of the NIC connector and plug it back again. 
> 
> For me it seemed like there was a problem with the (re-)initialization of the 
> interface or just its alias interfaces. Maybe for some reason you are locked 
> in a similar trap.
> 
> If this is the case the you might validate (e.g. using ping -I 192.168.40.184 
> 192.168.40.186 from your neighboring device) or settingup another alias 
> network only on the interfaces of this problematic link and see if the 
> problem is also there. 
> 
> happy debugging,
> 
> /axel
> 
> 
> On Samstag 24 November 2007, rene wrote:
>> Hi,
>>
>> a.anselmi@oltrelinux.com wrote:
>>> can you give the exact IP configuration (network, netmask end bcast IP)
>>> for every iface?
>> -------------------------------------------------------------
>> root@OpenWrt:~# ifconfig eth0:1
>> eth0:1    Link encap:Ethernet  HWaddr 00:0D:B9:04:C3:74
>>           inet addr:192.168.40.186  Bcast:192.168.43.255 
>> Mask:255.255.252.0 UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>>           Interrupt:10 Base address:0xc000
>>
>> root@OpenWrt:~# ifconfig ath0:1
>> ath0:1    Link encap:Ethernet  HWaddr 00:0B:6B:57:01:46
>>           inet addr:192.168.41.186  Bcast:192.168.43.255 
>> Mask:255.255.252.0 UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>>
>> root@OpenWrt:~# ifconfig ath1:1
>> ath1:1    Link encap:Ethernet  HWaddr 00:0B:6B:57:04:6C
>>           inet addr:192.168.42.186  Bcast:192.168.43.255 
>> Mask:255.255.252.0 UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>>
>> root@OpenWrt:~#
>> -----------------------------------------------------------------
>>
>> BATMAN was just started with 'batmand eth0:1 ath0:1 ath1:1'
>>
>> Regards,
>> Rene
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> 
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