From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Fri, 20 Aug 2010 14:22:52 +0200 From: Antonio Quartulli Message-ID: <20100820122251.GC6823@ritirata.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Subject: [B.A.T.M.A.N.] Question about multiple GW scenario 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: b.a.t.m.a.n@lists.open-mesh.org Hi guys, I'm writing a short report about the actual behaviour of b.a.t.m.a.n. in case of client roaming between bat-nodes. I was wondering what could happen in a particular (but not so unusual) situation: take a network made up of several nodes, and 2 IP gateways, say X and Y. These 2 gws are advertising themself as gw (via the gw-mode). Now we have two nodes A and B which respectively recognize as gw X and Y (A recognizes X and B recognizes Y, where recognize means "to have such gw as best gw"). Each gw runs a dhcp server which assigns itsself as default ip route. Now, what would it happen if a client roams from A to B and sends a new dhcp request (cause the lease time has expired) so changing the default gw from X to Y? The established connections will stop to work. I think that this is a classical level 3 issue in the hand-off procedure. What do you think about this problem? Am I missing something? Thank you all :) -- Antonio Quartulli ..each of us alone is worth nothing.. Ernesto "Che" Guevara