I will have my internal LAN with Cisco Catalyst (3750e's) and WAN with some 2801(s) to a MPLS network for my private WAN. I will also have a cable connection as a failover should the MPLS network fail. The connectivity to the cable connection will be a Sonicwall Pro series UTM appliance that is capable of OSPF. So OSPF being my common denomenator, I need to come up with a OSPF design that works well. At one site, I have 4 main buildings each with 3 VLANs (VLAN1, DATA, VOICE) of their own. I will have these 4 distribution/core (I don't have a single core switch) switches trunking down to my access switches. One of these dist/core switches will connect in my Sonciwall. What is the best OSPF design for this? I know whatever OSPF design I implement, I'll have to get the MPLS provider to redistribute through BGP for my other sites (same design scenario). I am not that up on OSPF and I have heard about being carefull of using Area 0 and not creating a flat OSPF network. Any help would greatly be appreciated.
I have this problem too.