A customer has two datacenter sites A and B connected over a corporate WAN.
Site A is using IP-range IPA, B is using range IPB.
Both sites will be moved to a new site C, the IP-range is not yet decided.
Is it possible to make the move activities more flexible, to extend the LAN of site A and site B to site C during the move (site C will be connected to A and B, either via the corporate WAN or a separate leased line)? The idea is to use the ranges IPA and IPB in site C and to avoid changing all IP-adresses. At the same time the ranges will still be in use at sites A and B, but individual IP-addresses will NOT overlap!!! The move will not be done in one day or weekend, but some months.
After the move, sites A and B will disappear.
I heard of a technology called "LAN extension", but could not find something on the Cisco Web.
Anyone any idea how to do this?
Thanks a lot in advance!