Can I have two hosts with same IP network address in different VLANs?
This scenario is not the typical network design. Under normal conditions, VLANs are build to separate broadcast domains which exists in a physical or switched LAN environment. Broadcasts are used to start communication on layer 2 of the OSI model between two systems. An ARP request is a typical broadcast sent out by an IP host to get the layer 2 (MAC-Media Access Control) address of another IP host. But in some cases it is useful two allow separation into VLANs within one IP subnet, e.g. for a test or a workaround. In that case, there is a possibility to do that: There must be a router or layer 3 switch with proxy-ARP functionality. The only limitation is, that the IP network must be subnetted and the router sits in between the both subnets. All other host do not need to be configured for this subnets. This router will receive all ARP requests on a LAN, even those which do not contain his IP address as destination. If the real destination is reachable in the other subnet (VLAN, port),
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