ECMP/multipath support

[Ondrej Zajicek]

On Thu, Dec 23, 2010 at 09:49:02AM +0100, Joakim Tjernlund wrote:
> Ondrej Zajicek <santiago at crfreenet.org> wrote on 2010/12/22 18:44:54:
> >
> > On Tue, Dec 21, 2010 at 11:57:12AM +0100, Joakim Tjernlund wrote:
> > > > BTW, currently even if an opposite address is known, BIRD OSPF ptp links use
> > > > multicast for HELLO protocol which would not work on physically ptp links
> > > > that does not implement multicast. But AFAIK in such cases multicast
> > > > (and broadcast) is implemented on OS level (just it sends everything
> > > > to the other side).
> > >
> > > Would that be AllSPFRouters? That is what you should use on ptp links(but not
> > > on ptmp links).
> >
> > Yes, that is what we do, so it is OK.
> 
> hmm, from a quick look I am not convinced that EVERY OSPF msg sent
> on PtP links uses AllSPFRouters as dst address.

I wrote about HELLO packets, these are sent to AllSPFRouters on PtP links.
Other packets are sent to the neighbor IP address, which is a slight
diversion from RFC 2328, but should not cause any problems.

-- 
Elen sila lumenn' omentielvo

Ondrej 'SanTiago' Zajicek (email: santiago at crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."
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