""Howard C. Berkowitz"" wrote in message news:[EMAIL PROTECTED] snip a bit > > In many topologies, it will get awfully expensive to have an ABR for > each area. I did one network for a large enterprise (2500 routers > and growing, of which 400 actively spoke OSPF).
Howard, what did the rest speak? Were you using static defaults and pointing those into the OSPF net? did they represent small sites, small office / home office kinds of setups? >The seven campuses > were all top-grade optical and stable, and it worked perfectly well > to have routers with around 5 nonzero areas, so no area could be > isolated by a single ABR failure. These were large areas, with a > major campus (thousands of desktops) plus static/default routed field > offices feeding into them (they could be NSSA). > > > > >What about put toghether two cities and form a bigger area with two ABRs? In > >that case, it would be necessary to connect these ABR through they > >particular area and area 0, so the database would be the same, right? > > What's the medium cost between the two cities? Can you use demand > circuits as a backup? Can you live with one more PVC and trust the > physical connection? Is QoS-unpredictable cable or DSL available? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=72641&t=72587 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
