I have 10.0.21.X/24 as a HSRP btwn 2 core peers in OSPF Area 0 which is my server VLAN. We are relocating our HQ and moving servers in phases. We found one server whereby clients connect via IP rather than hostname and say has an IP of 10.0.21.100/24. I need to relocate this server to a new subnet in our new building which is 10.100.21.100/24 while at the same time ensuring clients can still reach it via 10.0.21.100. The new HQ is connect via WAN which is Area 0 but the new server subnet 10.100.21.X/24 is in a non-zero Area.
How can I do this?