From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Wed, 4 Jul 2012 11:12:25 +0200 From: Simon Wunderlich Message-ID: <20120704091225.GA10142@pandem0nium> References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Q68bSM7Ycu6FN28Q" Content-Disposition: inline In-Reply-To: Subject: Re: [B.A.T.M.A.N.] BLAII + gw_mode, DHCP sometimes gets dropped Reply-To: The list for a Better Approach To Mobile Ad-hoc Networking List-Id: The list for a Better Approach To Mobile Ad-hoc Networking List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: The list for a Better Approach To Mobile Ad-hoc Networking --Q68bSM7Ycu6FN28Q Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello Guido, On Tue, Jul 03, 2012 at 05:07:17PM -0300, Guido Iribarren wrote: > Hello there again, > I have observed a problem since updating to 2012.2 and enabled BLAII >=20 > I'm compiling logs to understand what's happening, but as always, > reading logs only gets me more lost :( > So here i am again begging for help There are some debug levels for BLA as well, and you can now get the claimlist with batctl (which is basically the list of clients a gateway feels responsible for) - this may help for debugging. But first, we should clarify some more details for your setup. >=20 > the setup is the same I described in yesterday's attachment, but > what's not pictured is an ethernet cable between colmena-casa and > f8d11504758. > f8d11504758 is the only router that connects to the internet (through > WAN cable), and it's also the only one that has dnsmasq running and > gw_mode=3Dserver. > All the other nodes have gw_mode=3Dclient >=20 > All of the nodes have bridge_loop_avoidance=3D1 > (even though there are no other utp connections, so it could in fact > be enabled only on colmena-casa and f8d11504758) >=20 > with this setup, dhcp requests from the mesh sometimes get "lost", > either they don't reach f8d11504758 or the reply doesn't get out Questions: * which node runs the DHCP server? colmena-casa, f8d11504758 or something = else? * at which point is DHCP getting lost? is the DISCOVER/REQUEST from the cl= ient getting lost, or the reply from the server? * Can you specify "sometimes" a little bit more? What are the circumstance= s, how often does it happen? >=20 > this didn't happen with batman 2012.1 , setup as indicated by the BLAI > wiki page (batctl if add br-lan) > furthermore, with batman 2012.2 , BLAII activated, but gw_mode=3Doff in > all nodes, DHCP also works fine. Mhm, that's rather strange ... we had a similar problem when ap isolation was activated. Do you have this feature turned on? So DHCP is only having problems when gw-mode is turned on colmena-casa and f8d11504758? >=20 > So, a few questions arise: > is it a problem to activate bridge_loop_avoidance=3D1 in all nodes, > regardless of the fact that they "need" it or not? (that is, it is > activated on nodes that don't have any ethernet cables connected and > couldn't possibly create a bridge loop) No, that it is not a problem - you can activate it everywhere. It will just send some additional control packets on bat0, but won't do anything as long as it does not detect other gateways. >=20 > would it make a difference, if I add br-lan to bat0 (batctl if add > br-lan) the way I used to do with batman 2012.1 ? That won't help, because the design of BLA changed and the old BLA has been removed. Please keep the bridge out of bat0. :) Cheers, Simon --Q68bSM7Ycu6FN28Q Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEARECAAYFAk/0CPkACgkQrzg/fFk7axaJuwCfaZ6nn7ufwSDRkkbxtgQO5QXu x1UAniPjp+i5dobFFCQK6Id6MK3M9mVm =yEO3 -----END PGP SIGNATURE----- --Q68bSM7Ycu6FN28Q--