Jan, Creating 9 different areas might be hard to manage, therfore I propose that you may want to simplify this by clustering the remote sites into provinces/states. A book that my collegue and I have been reading in regards to our OSPF network design has been the Cisco - OSPF Design Guide, or Designing and Implementing an OSPF network - Cisco. Regards Simon -----Original Message----- From: jan Huizinga [mailto:jhui@gdb.com.gr] Sent: Tuesday, August 14, 2001 8:24 PM To: nanog@merit.edu Subject: OSPF Network design Hello, I have a question regarding OSPF design. I have a customer which has a hub and spoke topology, in the main site the have 5 routers and every remote site is using 3 routers and a 1/4 class C addresses. There are 8 remote sites. They have created for every site an area, so in total 9 areas + an area 0 makes 10 areas. Is this a typical OSPF design? At this moment this network is a 100% VoIP network (H.323). In the future they want also to give Internet access to their customers (dial-up and leased lines). The remote sites are connected with 1MB links, and some of them shall be upgraded to 2MB links. Any ideas? Or does some one have a good reference to a site or a book that deals with the designing of a (OSPF) network. I have books about OSPF but they talk all about the protocol, and don't give real world examples how to design this. Thanks, Jan