[ActiveDir] Site Replication Topology

[Creamer, Mark]

I’d like to revisit our site design, and am looking for some advice if possible. Right now we have a couple hundred physical sites in terms of individual IP subnets, but only a few sites defined in AD. The ones defined are the sites that actually have a domain controller located there. The greatest volume of traffic over our WAN is AS/400 emulation, so we have mostly slow links, 56-256K.   Reviewing Robbie’s book #1, I see he suggests a one-to-one site topology between sites defined in AD and physical sites where a subnet is located. Can I get an explanation why I would or might not want to set things up this way? My limited understanding of the sites was to associate the various subnets with a specific site, but I suspect there’s a lot more to it than that. Thanks!   Mark Creamer