Which are the minimum memory requirements for a router running OSPF in a WAN consisting of 45 of them?
Well, it depends on how big the routing table is.It also depends on the type of OSPF design you are making. For example if you have using the hierarchical design using the areas then Stub area or totally stub area routers dont need high memory on them. I would look atleast 128MB DRAM on the routers to run OSPF and other services on it.
HTH,Please rate if it does.