James Harper wrote: > I'm having a problem with Bridging + VLAN and think maybe it's a bug, or > at least a missing feature... > > I'm running xen (virtual machine) and am using bridging in the driver > domain (think 'host' under vmware) to give network access to the other > domains (think 'guest' under vmware). > > The host domain has the following network interfaces: > eth0 (connected to 'internal' network, for san and host communications) > eth1 (connected to 'internal' network, but no ip address, only to give > guests network access to 'internal' network) > eth1.2 (connected to 'external' network) > eth1.4 (connected to 'client1' network) > > And the following bridges > br0 (eth1 + any guest virtual interfaces requiring access to the > 'internal' network) > br1 (eth1.2 + any guest virtual interfaces requiring access to the > 'external' network) > > It only works if eth1 isn't added to any bridge interface. As soon as > eth1 is added to br0, no traffic is seen on eth1.2, almost like the > bridge is 'taking' all the traffic from eth1, including tagged traffic > before the vlan driver sees it. > > The above could be considered correct behaviour, except it breaks my > setup. Assuming I'm right about the cause, what I need is a dummy > interface like eth1.U which would 'see' all the untagged (eg vlan1) > traffic, and I could then attach that to the bridge. > > Another idea I have is to set it up as follows: > > br0 contains eth1 + virtual 'internal' network guest interfaces > br1 contains br0.1 + virtual 'external' network guest interfaces > > but i'm almost afraid to try it as it looks real ugly and I don't know > if a vlan is supported on a bridged interface, and I don't want to crash > the machine. > > Any and all comments would be appreciated! The bridge has it's hook before the VLAN code is hit, so if you do add the ethernet interface to the bridge, the VLANs on that ethernet interface will never see the packet. I do think that VLANs work on a bridged interface... Ben > > Thanks > > James > > PS. Before I knew anything about bridging, I tried a 'vconfig eth1.0', > which rendered the port on the cisco router inoperable until a router > reset. Cisco bug I assume... > > _______________________________________________ > Vlan mailing list > Vlan@xxxxxxxxxxxxxxx > http://www.lanforge.com/mailman/listinfo/vlan > -- Ben Greear <greearb@xxxxxxxxxxxxxxx> Candela Technologies Inc http://www.candelatech.com
