On Wed, Mar 15, 2006 at 10:15:09PM +0100, Andre Oppermann wrote: A> > A> These changes faciliate running of multiple cooperating routing A> > A> daemons at the same time without causing undesired interference. A> > A> Open[BGP|OSPF]D make use of these features to have IGP routes A> > A> override EGP ones. A> > A> > Please explain how is this done. Does radix allow presence of two A> > identical prefixes in tree, and we distinguish them by rt->rt_flags? A> A> No. If you've got the same prefix in BGP and OSPF with different next A> hops then the OSPF one should win. Normally the two daemons would get A> into a fight about this and indefinatly try to replace each others A> route again. This change makes it possible for two cooperating daemons A> to avoid this. With the change to flags OSPFD may take over an existing A> route by chaning the PROTO flag to itself. BGPD then knows it got an A> override. Before OSPFD had to delete the route and re-add it with its A> own parameters. However upon the delete message BGPD would try to add A> it again. When OSPFD removes a route that was identical to a BGP one A> BGPD will re-add its own version of it.
So, we have a small window when the route is absent in kernel, right? -- Totus tuus, Glebius. GLEBIUS-RIPN GLEB-RIPE _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/cvs-all To unsubscribe, send any mail to "[EMAIL PROTECTED]"
