I've got a WAN that needs some redesign and I'm just looking for some input on my proposed design.
Currently, I have 3 sites connected by DS3's. Site A and B have two DS3's between them, and there's one DS3 connecting over to a remote office. These DS3's all terminate on routers that are in the same VLAN as the servers. My "core" at Site A is composed of two 4500 switches, and Site B has the same basic "core".
I would like to change it so that each site's routers terminate on their own VLAN at Site A. Is this a good idea? Also, should each router from Site B terminate in it's own Vlan or is it an acceptable practice to have those two routers terminate in the same VLAN?
I've attached a diagram to illustrate.
Thanks in advance. (Many points will be given for this question)