Peter Rathlev wrote: > On Wed, 2008-08-20 at 07:41 -0700, Kelvin Goei wrote: >> Want to ask, what is the benefit if we are using point-to-point for >> connection between each zones router to the core instead of using >> dr/bdr connection? > > Configuring a link as "point-to-point" means that OSPF skips the BR/BDR > election, making the calculations a little simpler. Normally a > multi-access media (like Ethernet) means the SPF algorithm has to use a > "trick" to build a graph, since all graph links must exclusively be > between two nodes. Electing a pseudo-node and treating the multi-access > media like a star topology solves this, but makes the SPF graph more > complex. > > Regards, > Peter >
Just to add, just in case it isn't obvious from Peters comments, that the neighbor establishment can also be quicker since DR election does not occur. The wait timer, which is normally 40 seconds, does not need to be used. Paul. -- HEAnet Limited Ireland's Education & Research Network 5 George's Dock, IFSC, Dublin 1, Ireland Tel: +353.1.6609040 Web: http://www.heanet.ie Company registered in Ireland: 275301 Please consider the environment before printing this e-mail. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
