Thanks Marc. Yeah i think you want to disable it usually on multipoint interfaces ? Although i haven't been doing that actively and things still seem to work ok (but then again i might just have introduced a loop in my network)
Maybe i just haven't been paying attention, but i don't think i usually see it on the interfaces in the running config. Is it still enabled and we just don't see it ? Many thanks for your replies, it is much appreciated. Alef On Jul 15, 2011, at 11:29 PM, marc abel wrote: > It is on by default, on pretty much every int type and for every > protocol. OSPF however isn't affected by it because it really doesn't > advertise routes. It advertises LSA's from which routers then build > their routes from. So practically you just need to worry about the > distance vector protocols EIGRP and RIP. > > It is of particular importance to disable split horizon on the hub > when you have EIGRP or RIP running on a frame relay or PPP hub and > spoke topology. > > On Fri, Jul 15, 2011 at 3:54 PM, Alef <[email protected]> wrote: >> Hi Marc, >> I thought i did put the lab number in the subject header? >> >> I guess i have to do some more learning about split horizon. I didn't know >> it was by default enabled? Is it an EIGRP thing ? >> >> Thanks again, >> Alef >> On Jul 15, 2011, at 8:19 PM, marc abel wrote: >> >>> Because Cat4 is learning the route from BB2on it's vlan50 interface. >>> With split horizon enabled it will not advertise that route back out >>> it's vlan50 interface so you won't be able to learn it on R8 from >>> cat4. If Cat4 were originating the route, or learning it on a >>> different interface this wouldn't be an issue. >>> >>> Make sense? >>> >>> P.S. You may want to include the lab # in your questions. I got lucky >>> with your first question and guessed right. >>> >>> On Fri, Jul 15, 2011 at 12:48 PM, Alef <[email protected]> wrote: >>>> Anyone working on this task? Instead of getting the routes from BB2, R8 >>>> needs to get them from Cat4. >>>> >>>> The task does not really explain why we need to disable split horizon on >>>> vlan50 interface on cat4. >>>> Could anyone provide a good explanation ? >>>> _______________________________________________ >>>> For more information regarding industry leading CCIE Lab training, please >>>> visit www.ipexpert.com >>>> >>>> Are you a CCNP or CCIE and looking for a job? Check out >>>> www.PlatinumPlacement.com >>>> >> >> _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
