[c-nsp] OSPF areas?

[Tim Durack]

On 3/23/06, sthaug at nethelp.no <sthaug at nethelp.no> wrote:
> > Not convinced multiple areas do anything for us aside from complicate things.
> > Plus I have run into the situation where an intra-area route is
> > preferred by OSPF even though an inter-area route might actually be
> > better.
>
> As far as I remember that behavior is mandated by the OSPF RFC.

Yup, I didn't know the full implications 'till it annoyed me though...

> > If I were doing it again I would seriously consider running OSPF for
> > infrastructure, and iBGP for the "Customer Edge." I like the idea of
> > separating out the edge from the core routing wise. This would provide
> > a lot of control over policy. But perhaps that would be
> > overengineering too.
>
> Customer routes in iBGP, backbone links in IGP is *very* common in
> service provider environments.
>
> Steinar Haug, Nethelp consulting, sthaug at nethelp.no
>