On Wed, 16 Jan 2008 15:09:48 +0100 Marian Jancar <m.jancar@xxxxxxxxx> wrote: > Hi, > > I need some explanation/help with a probably bit uncommon bridge setup. I have > devices that come with their manufacturer MAC addresses, and I need to create > a bridge that uses my MAC address instead and has to look about like this: > > br0: unique MAC address from my range > wlan0: same MAC as br0 > (madwifi supports 4 MAC frames in STA mode so the actual bridging works, > just if you are curious :p) > eth0: any MAC address higher than the br0 MAC, > and as long as the assumptions below hold, unique in just this bridge, > eth1: ditto > ... > ethN: ditto > > > Now, the only reason I can think about from my naive point of view, why the bridge > cares about port MAC address at all, is maintaining a reliable and persistent > connection between the logical port and the actual physical device for STP > purposes. > > So if I'm right, I can assign any MAC addresses to the ethernet ports, as long > as they are higher than the wlan0 address, to ensure that the bridge selects > the wlan0 MAC as its own, and as long as they are locally unique. > The MAC addresses of the ethernet ports will not appear in any non-STP > packets and don't have to be globally unique, because they identify ports in > just this bridge and STP handles that, just a port has always to have the > same address and not a random one. > > Is this correct? If not, is there any other way to create a bridge and > not to have to allocate a unique MAC to each port? > > Any comments and/or pointers to relevant documentation are highly appreciated. Latest version of code allows bridge to have any mac address. You do HAVE to make sure device in bridge has a unique mac address. _______________________________________________ Bridge mailing list Bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/bridge
