Dual NIC's on the same subnet
Posted on 2014-07-16
Hoping you can clarify something. One of our clients requested a VM with multiple NIC's on the same subnet. They are now reporting they are unable to connect to it from a different subnet on the additional IP addresses. They can however on the original IP that is assigned to the NIC that has the default gateway.
Now to me this is correct, as packets are received on the additional NIC's, but since they come from a different subnet, it will not know where to route them. As such it passes the returned packets to the NIC with the default gateway and back to the originators IP. However when the originator receives these packets, they are now from a different IP address than it was expecting and thus rejects them
Is there any way around this?