We had two W2K3 DC's in production on a Class C network, installed two new physical servers, W2K8 R2 on a Class B Network, and each has it's own Class C. Kept the DC_OLD01/02 servers online for a few weeks to make sure that while we re-IP'd static network devices to the new IP range, they'd still be accessible via VLANs on the Cisco switches. Then physically removed them from production.
Production servers (reported from DC_PRODUCTION01, AD Domains and Trusts):
Name: DC_PRODUCTION01, Site: Default-First-Site-Name, DC: GC, DC Version: W2K8 R2, Status: Unavailable
Name: DC_PRODUCTION02, Site: Default-First-Site-Name, DC: GC, DC Version: W2K8 R2, Status: Online
Name: DC_OLD01, Site: Default-First-Site-Name, DC: GC, DC Version: W2K3, Status: Unavailable
Name: DC_OLD02, Site: Default-First-Site-Name, DC: GC, DC Version: W2K3, Status: Unavailable
Operations master: DC_PRODUCTION01 Current FFL: Windows 2000 Current DFL: Windows Server 2003
AD Sites and Services:
Subnets: DC_PRODUCTION01's IP (x.x.x.x/17), DC_PRODUCTION02's IP (x.x.x.x/17), DC_OLD01's IP (x.x.x.x/24), DC_OLD02's IP (x.x.x.x/24)
I'd like to remove the /24 IPs from the ADSS system (the two physical servers are no longer even on the network) and upgrade the FFL and DFL to W2K8 R2 on DC_PRODUCTION01.
There are no plans to go backwards (W2K3) as there are no physical W2K3 DCs in the network.
The DC_PRODUCTION servers are already in production had dcpromo and adprep (I belive), and have been online for 3 months now.
Which get's raised first? FFL or DFL? Or does it matter? I know I need to remove DC_OLD, from Change Active Directory Domain Controller...
The only other servers in this production environment are two DFS servers (connected to iSCSI SANs) and a SQL server (All running W2K8 R2 OS). No Exchange or Lync servers in production (those are hosted offsite).
DHCP/DNS is configured correctly as well and production client PCs are all pointing to the DC_PRODUCTION01.
Any other best practices before raising the FFL and DFL? It should be a fairly smooth upgrade, correct? FFL first/second?