[c-nsp] OSPF scalability

[Kristofer Sigurdsson]

Hello,

We are about to implement a broadband aggregation "stack",
built from a few 7301's.  The idea is that each of the 7301's
will have "outside" connectivity (despite the wording; no NAT 
involved :-)) and announce via OSPF and iBGP the whole IP range
for our broadband customers.  The boxes will then exchange host
routes (connected routes) internally so that even if the "wrong"
box gets a packet for a customer initially, it delivers it to
the right one.

We were planning on using OSPF to exchange the connected host routes
between the 7301 boxes.  I was, however, wondering about it's 
scalability.  Can I realistically expect OSPF to be happy with several
thousand routes, each mapped to a seperate interface (does every 
interface, including the virtual-access interfaces, have to go into the
link state database in every box?).  If not, I guess my best option 
would be iBGP between the boxes?

We were planning to implement this using different OSPF areas, any ideas
on that would be welcomed.

Thanks in advance,
Kristofer