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Migration strategy -

Hi.. I currently have two segments on my network:

192.168.16.0/24 and 192.168.17.0/24 along with other routers and stuff that go to other places. The Cisco 3620 router routes between the segments and feeds switches dedicated to each segment. I have DHCP running and also use static IP addresses for about 70 servers and non dhcp capable pieces of equipment.

Here is the issue. I need to change the IP addresses of these segments to 172.29.112 and

172.129.113 respectively.

Is there a way that I can sit the new segments right on top of the old segments and then change the Static IP addresses over without losing connectivity? I would imagine that I could then change over the static IP addresses to the new numbers then change dhcp in one fell swoop. If I just get a cheap router (or a quick linux box) to route between the segments, can I plug the 172.29.112.1 and 113.1 ports of the new router into the switch fabric of the old segments and route both segments appropriately?

TIA David

Reply to
DLH
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Hi. Maybe secondary IP address can help you. you can add both new IP address gateway on each interface. for example

interface f0/0

192.168.16.254/24 172.29.112.254/24 secondary

then change the DHCP ip address pool to 172.29.112.1~100 (see you situation) at this time.both 192.168.16.0 and 172.29.112.0 have connectivity. you can manually change 192.168.16.x static address.

once you complete change all 192.168.16.0 host. you can choose a proper time to change the interface ip address. delete 192.168.16.254 forever.

this is my 2 cent

Reply to
kevin

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