I understand what sites and subnets are used for in AD. this my configuration:
1) We hqve a national network
2) Some 3000 users in London on a fast LAN. I am using 5 DC/DNS/GC servers to improve logon performance. I have also created 5 Sites called London-1 to London-5 to load balance among the 5 DCs and intend to place 1 DC in each site. Each site has at least 20 Vlans.
3) I have 5 more large (200 to 400 users) remote offices but with 34mb connectivity back to London and each have 1 DC/DNS/GC and their own site. Again a number of VLANs per site.
4) I also have 40 small offices (30 to 50 users) with limited connectivity. I have created two sites and assigned 20 offices (generally one VLAN in each office) to each site.
The above should provide performance and load balancing for GC/DNS and DC logon.
QUESTION. In London I have all my DCs in the same server room in the same subnet. Currently this server room subnet belongs to LONDON-2 site so when I promote the a server to DC it appears in that site.
OPTION-A) CAN I SIMPLY MOVE THE SERVER TO ANOTHER SITE LIKE LONDON-1 ????
OPTION-B) If not should I create a physical VLAN (CISCO VLAN) and create an AD SUBNET and then attach that subnet to the correct SITE ???
OPTION-C) or Can I simply create an AD subnet with just one IP-address (The DCs IP-address) nd assign that subnet to the SITE???
Please assess the above 3 options and tell me:
1) Which option is correct?
2) WHY??? I really need to know why and evidence for the reply.
I think I should get away with option-A but need to check with fellow experts...
I need this answered by tomorrow and hence 500 points for a quick and thorough answer please...