On 8/8/07, Brian Candler <B.Candler@xxxxxxxxx> wrote: > On Wed, Aug 08, 2007 at 04:18:29PM +0530, pankaj jain wrote: > > you have mentioned only eth0 in the figure, I dont know how you can > > connect to multiple devices using single interface. if you are able to > > connect then I am assuming that you are using a switch in between. > > I would say you can use vlan aware switch. > > Yes, that's correct. eth0.1, eth0.2, eth0.3, eth0.4 are VLANs 1-4 on eth0 in > the diagram I gave. > > > the port in which eth0 is connected will be configured for all > > vlan-ids and the other ports on which the routers are connected will > > be configured only for the corresponding vlan-id. > > > > The only problem I feel can occur in the learning phase of the switch > > is whether it will forward arp requests on the basis of vlan-id or > > broadcast to all ports. If it broadcasts it will be a problem. > > If it does, then it is not a switch, but a heap of junk. Broadcasts of any > sort (ARP or otherwise) on one VLAN should never appear on ports belonging > to any other VLAN. > > Anyway, I don't have any problem with the switch part; it's the Linux > configuation to allow the same IP address range to appear on multiple > interfaces which is the issue. > If you prefer, consider my original diagram with four separate ethernet > cards called eth0, eth1, eth2 and eth3. The problem remains the same. > > Regards, > > Brian. > It would be very helpful if you could please explain the issues which we can face if we plumb the same IP address range on multiple interfaces because I normally assign the ip addresses from the same subnet to all of my interfaces. -- Thanks Pankaj Jain - To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
