On Mon, 10 Oct 2005 10:30:05 -0400 "Hai Wang" <hwang@xxxxxxxxxxxxx> wrote: > Hello, > > I have some questions regarding how to bridge VLANs and LAN, I > have the following scenarios and configuration, but it dos not seem > to work, please shed some light on it. Thanks! > > I have a Linux box which has 2 GNIC (Eth0 and Eth1) and one ATM card > > 1.) Scenario I > > Packets<------->Eth0<--->Eth1.x(VLANs)<--->Internet > > #vconfig add eth1 1 > #brctl addbr br0 > #brctl addif br0 eth0 > #brctl addif br0 eth1.1 > #ifconfig br0 up > This should add a tag with VID=1 in one direction (left to right), and strip the tag in the other direction. You may need to "ifconfig eth1.1 up" too! Also, note that VID=1 may confuse some third-party switches which are upstream of your linux-based vlan bridge. You'd be safer using some other VID. > 2. Scenario II > > Host 1(10.10.10.x)--->Eth0<--------->Eth1<---->Host 2 (11.11.11.X) > > #brctl addbr br0 > #brctl addif br0 eth0 > #brctl addif br0 eth1 > #ifconfig br0 up > > I can ping if and only if Host 1 and Host 2 are in the same domain, > say 10.10.10.X. I believe that bridge should be able to bridge > traffics between different network domains, but how? > No. Bridges just extend a broadcast domain. Every IP stack on that broadcast domain needs to be on the same subnet. Also, I can't see what Scenario II has to do with 802.1q vlans.... > Any help is much appreciated! > > Hai > > Regards, Alex
