I've got a strange situation, I have a server that is connected to an old static IP on a totally different gateway, dns, subnet and a new static IP again with a new gateway dns subnet. I also have about 50 domains pointed to the old IP, I want to make this as seemless as possible so is there a way to activate both connections on one nic? Here is a little diagram of the network topology:
2 Internet Connections go into switch ==> One line comes off switch and into server(Everything is layer 2 only)
ifconfig eth0:1 11.22.33.44
, then configure the gateway viaroute
and everything should be working. Of course you need to be able to connect to the 2IP addresses from that cable you're plugging inside the nic.