Any alternative way that doesn't break the rules is a good one to know! There is really no reason I can give you as to why we never used that particular command other than that the lab author did not find it all that interesting or overly important. The other thing you could do is just not advertise the loopback into BGP at the same time as your IGP...just don't use the network command at all!
I don't see why the BGP backdoor option could not be used to accomplish what you are saying. nice! On Thu, May 13, 2010 at 3:52 PM, Robert Simmons <[email protected]> wrote: > Ipexperts, > > In various labs, I've noticed that you guys present a scenario where you have > two eBGP nodes peering via a loopback that is being advertised via an IGP. > Obviously, this is going to cause the neighbor to "flap" since the eBGP AD 20 > metric will supersede any of the default IGP metrics. The two techniques I've > seen you guys use throughout your workbooks are to either filter the loopback > via route-map on the neighbor or playing around with the distances to make > the IGP loopback preferable. The technique I always use and to me seems much > simpler is just using the network statement with the keyword "backdoor" for > the peer's loopback address. I haven't seen you use this technique and I'm > wondering if there is a reason why? Obviously, if you have certain > restrictions in a particular lab I wouldn't use it but, if there aren't any > shouldn't this be a valid method as well? > > I'm just wondering if there is some downside that I'm not seeing. > > Thanks > > -Rob > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > -- Regards, Joe Astorino - CCIE #24347 Sr. Technical Instructor - IPexpert Mailto: [email protected] Telephone: +1.810.326.1444 Live Assistance, Please visit: www.ipexpert.com/chat eFax: +1.810.454.0130 IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, Audio Tools, Online Hardware Rental and Classroom Training for the Cisco CCIE (R&S, Voice, Security & Service Provider) certification(s) with training locations throughout the United States, Europe, South Asia and Australia. Be sure to visit our online communities at www.ipexpert.com/communities and our public website at www.ipexpert.com _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
