I think the max numbers are somewhat conservative. There are SPs
that run more than 350 routers in one area successfully these
days.
Bora
"Jerome" == Jerome Etienne <jerome(_at_)zeroknowledge(_dot_)com> writes:
    Jerome> rfc2329 may help you.  Parameter Responses Min Mode
    Jerome> Mean Max
    Jerome> _________________________________________________________________
    Jerome> Max routers in domain 8 20 350 510 1000 Max routers
    Jerome> in single area 8 20 100 160 350 Max areas in domain
    Jerome> 7 1 15 23 60 Max AS-external-LSAs 6 50 1K 2K 5K
    Jerome>                       Table 3: OSPF domain sizes
    Jerome> deployed
    Jerome> On Thu, Jan 25, 2001 at 08:35:15AM -0600, David Wang
    Jerome> wrote:
    >> Hi,
    >> 
    >> I have a question about the size of the IS-IS and OSPF
    >> area. What is the guidelines in setting up the IS-IS or
    >> OSPF area? How many routers an area can have? What are
    >> the key facts to determine how many routers an area can
    >> have? router memory size? router interface bandwidth? or
    >> some other facts?  Is there any quantitative relationship
    >> among various parameters?
    >> 
    >> Thank you for your help!
    >> 
    >> David