[c-nsp] OSPF design (danger will)

[Benny Amorsen]

"Christopher J. Wargaski" <wargo1 at gmail.com> writes:

> It just doesn't make sense to run OSPF when all of the links to the
> remote locations will be running BGP.

Actually it does, in some cases. BGP cannot maintain 2 links to the same
neighbour, and so it does not work if you have redundant links (except
for LACP links and similar). That is when you need OSPF so you can peer
on the loopback addresses.

It is a bit surprising that no one has bothered to make an extension to
BGP for this purpose, but I guess the OSPF/BGP combination works well
enough.


/Benny