OSPF performance/SPF calculations
joakim.tjernlund at transmode.se
Fri Apr 23 11:22:00 CEST 2010
> Ondrej Zajicek <santiago at crfreenet.org> wrote on 2010/04/23 10:32:06:
> > > > The development state of Quagga is sad. Do you implement it in a different
> > > > way than in BIRD? I wonder whether there is any other possible way to get
> > > > next hop address for unnumbered ptp links than from source address
> > > > of HELLO packet.
> > >
> > > Yep, now it gets tricky. It took me quite some time to figure out what to
> > > do. The secret is that you never use search for the interface using IP addresses
> > > in the LSA's.
> > That we never done for PTP ifaces.
> > > Instead you record what interface created what entry in in your
> > > own Router LSA. Based on the position of on entry in your own router
> > > LSA you can lookup the interface that created that entry. Once
> > > you know the interface, the reset is easy.
> > Yes, i got the idea. Our algorithm (for PTP) is to search for a ptp
> > iface with a full neighbor with given Router ID and choose the cheapest
> > one. This would lead to the same results as your idea, but a slightly
> > less efficient, but probably not important unless you have a hundreds
> > of PTP ifaces on a router.
Forgot to mention, you use my proposal for ALL I/Fs, not only for PtoP I/Fs
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