Just to make my question clearer, I don't use wireless card, I use regular ethernet card, and then plugged in wifi modem. I have tested the case of 4 linux boxes with one wireless modem on each box. I can check which is root bridge and the rest the designated bridge. I did it with 4 linux boxes together. I haven't done the scenario I asked. In order to make box A and C talk, packets from A to B have to be sent out to C through the same ethernet port. So my question is will B deliver the packet through the same port as it received? Thanks, Jie >From: Stephen Hemminger <shemminger at osdl.org> >To: "Jie Chen" <cj70286 at hotmail.com> >CC: cam at schaus.ca, bridge at lists.osdl.org >Subject: Re: [Bridge] Monitor the status of two ethernet interface >Date: Thu, 4 Jan 2007 13:03:16 -0800 > >On Thu, 04 Jan 2007 20:39:12 +0000 >"Jie Chen" <cj70286 at hotmail.com> wrote: > > > Hi all, > > > > I hope everybody had a great holiday. > > > > I got a question in applying ethernet bridge in Linux boxes. The >scenario > > I'm trying to simulate is like this: I have 3 linux boxes in total, > > everyone has 2 ethernet ports, one port is connected to Power line >modem, > > and the other to wifi modem. The power line modem failed, so it's the >same > > as I have just one port for each. I put them apart, Box A is in one end, >and > > Box C is in another end, and Box B in the middle, so that Box A can talk >to > > B but not C. Box B can talk to A and C. Box C and talk to B but not A. >Now I > > set bridge on, the question is am I able to let A and C talk? > > > > The reason I have this question is according to bridge, B get packets >from A > > on one port, and suppose to deliver to C from the other port, but the >other > > port didn't work. So I would think the packets can't be delivered from A >to > > C, is that the case? > > > > Thanks a lot, > > Jie > > > > > >True bridging to Wifi won't usually work see the >http://linux-net.osdl.org/index.php/Bridge > >The problem is that internally Wifi is not a Bus network like Ethernet, but >is really point-to-point from host to access point. > > >-- >Stephen Hemminger <shemminger at osdl.org> _________________________________________________________________ Your Hotmail address already works to sign into Windows Live Messenger! Get it now http://clk.atdmt.com/MSN/go/msnnkwme0020000001msn/direct/01/?href=http://get.live.com/messenger/overview