Our company is moving some servers, firewalls, routers etc from Data center A to Data Center B (located in the same city).
There is only a small amount of gear involved although the move will be done in two stages, over a weekend to break it down into manageable chunks.
At the end of the task we will have no equipment left at Data Center A.
Connections to both Data Centers is via a fiber network that also connects to a remote Data Center and also to several branch offices.
A BGP routing process is used to advertise the networks between sites. Data Center A & Data Center B are different AS numbers.
To avoid re-addressing hosts and default gateways etc I would like to use the existing Data Center A "Interconnect Network" eg 10.10.36.0/26 at Data Center B. So for a short time it would need to exist at both locations.
The network is basically router --> layer 2 switches --> multiple firewalls with a leg on the Interconnect --> Firewall LAN segments.
Static routes on the router point to the next hop firewall and some static routes on the firewalls point directly to other firewalls as the next hop where necessary with the default route pointing to the router.
Is it possible to advertise the 10.10.36.0/26 network at both sites (Data Center A & Data Center B).
Can I filter the routes I need to advertise down to host routes?
I need to be able to connect remotely from Data Center C to the remaining gear at Data Center A and also be able to connect to the gear at Data Center B that will move in Stage I
Would I do this with a distribute list?
I do not want to filter any other network routes as I will remove those networks from the BGP process and re-advertise them from the new site router at the appropriate time.
Any comments, help etc would be much appreciated.