A fairly old topic but a question still - in a 3 site AD domain/forest, 2003 forest and domain level, 2x 2012R2 DC, 1x 2008R2 DC, and a single site link that all 3 are members of (cost 100, replication 15 min) - KCC doesn't end up creating a full mesh but a hub and spoke topology.
So it ends up being Site A connects to both B and C, but B and C just go back to A and don't set up links to each other - which I'd prefer a bit more redundant, but without manually creating any links.
Is there any reason/logic for hub and spoke even though 3 sites really should be a ring/mesh?