Re: [B.A.T.M.A.N.] batman majareta? I can batctl ping but not ping

[Antonio Quartulli <ordex@autistici.org>]

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Hello Gioacchino,

On Sat, Jul 21, 2012 at 08:54:05PM +0200, Gioacchino Mazzurco wrote:
> Same bug today in ninux pisa after a node was turned off the entire
> network became crazy for 2 hours, to solve i had to restart a lot of
> nodes... :|
> 

Which version are you using? The lastest openwrt package version (so with all
the new patches?)

Could you provide the log of the involved nodes whenever you get this problems?
I wrote something about the desired logs to Guido, you could follow the same
instruction. It would really be appreciated!

Thank you!


Cheers,

> On 07/02/12 15:30, Guido Iribarren wrote:
> > (which roughly translates as "batman gone nuts?")
> > Hey great devs!
> > we've been having a particular issue in deltalibre and quintanalibre
> > (local WCN) with batman-adv, but so far we haven't found a precise way
> > to reproduce it.
> > The symptom is that (after some reboots or physical displacements?)
> > one batman-adv host becomes unreachable on layer3, although it is seen
> > on originators table, and can be batctl ping'ed or batctl tracerout'ed
> > with no problem whatsoever.
> > 
> > Even more, it not unreachable from the whole network, but instead from
> > just a few other nodes. So, let's say that the nearer nodes can layer3
> > ping it , but some others farther away cannot (although i can't assure
> > it depends on the hop distance)
> > All of them can batctl ping it (layer2)
> > A hard reboot of all the nodes solves it, connectivity is restored in
> > all directions.
> > 
> > Thing is, I've just came across it again, and managed to do some tests
> > to aid in description / debugging
> > As an aid in understanding network topology,
> > I'm attaching the wonderful output of "batctl vd dot |grep -v TT" for
> > your viewing delight
> > 
> > problem node is ana
> > it can be reached from ruth and hquilla (direct neighbours)
> > but arping behaves erratically from colmena or charly
> > and normal ping (v4 or v6) doesn't receive any reply at all when run
> > from colmena or charly
> > 
> > I used arping, with and without -b , and seemed like i could narrow
> > the problem down to incoming broadcast packet handling, but further
> > tests just left me more puzzled!
> > 
> > all nodes are tl-mr3220 running openwrt trunk r31316 with batman-adv
> > 2012.2.0 , driver ath9k
> > secondary interfaces named _wlan1 are all tl-wn722n which uses driver ath9k_htc
> > nodes are around 100meters (+/-50mts) apart from each other
> > 
> > this behaviour has been observed (but not reported) in dissimilar
> > setups, using ubnt bullet2 mixed with mr3220, running r29936 with
> > batman-adv 2011.4.0 , with nodes 1 or 2km apart from each other.
> > 
> > Tests are the combined crude output of batctl td and arping, so to
> > make this email ease on the eye, i'm publishing them elsewhere:
> > http://pastebin.com/6PPwN3PS
> > 
> > The live openwrt configuration can be analysed in detail at
> > https://bitbucket.org/guidoi/deltalibre-configs/src
> > (it's a free, open network after all! :D )
> > in particular:
> > ana -> https://bitbucket.org/guidoi/deltalibre-configs/src/6de4ce970fe2/mac/54_E6_FC_BE_26_12
> > hquilla -> https://bitbucket.org/guidoi/deltalibre-configs/src/6de4ce970fe2/mac/54_E6_FC_BE_28_34
> > colmena -> https://bitbucket.org/guidoi/deltalibre-configs/src/6de4ce970fe2/mac/54_E6_FC_BE_29_D2
> > 
> > Thanks a lot for the attention,
> > Hope that you are having fun, and that I'm not spoiling it :)
> > 
> > Cheers!
> > 
> > Gui

-- 
Antonio Quartulli

..each of us alone is worth nothing..
Ernesto "Che" Guevara

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