Move a subnet to a same addressing subnet
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Hello everyone,
Currently, I have to move a complète subnet form my site A to the site B. Here is my infrasctructure:
For various reasons, I can't change the subnet adressing and I will operates the move during several days. I will each service one by one and keep its IP address.
So I need to keep the subnet 192.168.18.0 of Site A available during the moveand I also need to create the subnet 192.168.18.0 of the Site B at the same time.
Both subnets need to be able to communicate during the move and I'm looking for an idea to do this without addressing conflicts.
I don't know if it's possible, is someone have an idea for me?
Thank you!
Mathieu Drapeau
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Problem you run into is how will site B box Y know you moved 192.168.18.X to the other site, if Y wants to talk to X.. He will think its local, and never send to its gateway.
And as you move X over to A, how will X know that box Y is still over at site B..
Easier solution would be to use a different network say 192.168.19 or 172.16.18 as you migration network.. So you move 192.168.18.X to site A and change its IP to 172.16.18.X.. Changing any dns you need to at each site to reflect the fqdn new IP on the new site.
Once you have everything moved over - you can change the 172.16.18 back to your 192.168.18 network.. And change all your dns to reflecting the correct address.
