[c-nsp] OSPF areas?

[sthaug at nethelp.no]

> Are you building a service provider network or an enterprise/campus  
> network?
> 
> For all networks with fully deployed BGP (SP networks), it is  
> recommended that you only have loopbacks in IGP, and all customer  
> routes in iBGP. If this is the case, then only a single area is  
> required.

Also, in a service provider environment, you are more likely to want
MPLS TE, which is easier to handle with a single area.

Steinar Haug, Nethelp consulting, sthaug at nethelp.no