We have some branches that we need to migrate to a subnet that fits into our corporate WAN address space.
The complication is that these branches already have an existing data centre which is hosting some business critical services. We cant change all the branches at once because of disruption so we have decided to do the ip address change branch by branch
We have had some suggestions where we could have both address living side by side at the local branch level and any traffic that needed to stay local (to the country) could do so and any that needed to reach the corporate data centres could still do so.
Currently the branches connect via a hub and spoke topology to there local In country data centre via vpn
The plan is to stick an Anira netgate box on there existing circuit at the branches which will allow communication through the anir cloud to the rest of the corporate network (10.0.0.0/8) but during the transitiion we still need to be able to route local traffic to the current class c address
Any suggestions would be really appreciated.