On Wed, 12 Mar 2008 10:46:48 -0400 "Andy Gospodarek" <andy@xxxxxxxxxxxxx> wrote: > On Tue, Mar 11, 2008 at 11:29 PM, Philip Prindeville > <philipp_subx@xxxxxxxxxxxxxxxxxxxxx> wrote: > > > > Stephen Hemminger wrote: > > > On Mon, 10 Mar 2008 11:05:53 -0700 > > > Philip Prindeville <philipp_subx@xxxxxxxxxxxxxxxxxxxxx> wrote: > > > > > > > > >> I'm using Linux 2.6.20 (yes, I'll be upgrading to 2.6.24 as soon as it's > > >> stable). > > >> > > >> I have 4 VIA rhine ethernet controllers on my Soekris net5501, plus an > > >> ADSL PCI card (a Sangoma S-518) that runs in AAL5-SNAP mode, so it looks > > >> like an Ethernet controller. > > >> > > >> I'm trying to bridge eth0 and w1ad (the ADSL interface) into "br0". And > > >> I'm trying to force the traffic on br0 to have the MAC address that my > > >> ISP insists I use (i.e. that of the crappy little Westell 6100 modem > > >> they sent me). > > >> > > >> The issue is the following. If I do: > > >> > > >> ifconfig w1ad down hw ether x:x:x:x:x:x up > > >> > > >> followed by either: > > >> > > >> brctl addbr br0 > > >> brctl addif br0 eth0 > > >> brctl addif br0 w1ad > > >> > > >> or: > > >> > > >> brctl addbr br0 > > >> brctl addif br0 w1ad > > >> brctl addif br0 eth0 > > >> > > >> the bridge ends up taking the MAC address of eth0 either way, which I > > >> don't get (how does it decide which to use?). > > >> > > >> I can clone the same MAC address to both eth0 and w1ad, but I don't know > > >> if that would cause me any problems or not (I haven't read the STP spec > > >> in about 15 years). > > >> > > >> > > > > > > Having the same mac address on both just is going to be problematic (impossible > > > to do STP), so don't if you don't have to. > > > But you can set address of bridge and eth0 to any address you want. So set these > > > to the ISP assigned address. You probably will have to do it after bridge > > > is created. > > > > > > brctl addbr br0 > > > brctl addif br0 w1ad br0 > > > ifconfig eth0 hw ether x:x:x:x:x:x up > > > ifconfig w1ad up > > > ifconfig br0 hw ether x:x:x:x:x:x up > > > > > > ifconfig br0 A.B.C.D netmask 255.255.255.0 > > > > > > > That seems to not work. I get: > > > > # ifconfig br0 hw ether "00:18:3A:55:15:35" > > > > ifconfig: SIOCSIFHWADDR: Cannot assign requested address > > # > > > > Any ideas why? I'm doing this before an IP address has even been > > assigned... Assign the hardware address of the bridge was only added in later kernels. _______________________________________________ Bridge mailing list Bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/bridge
