Nick,Agree with you 100% and disagree with the DSG. This is what I did when I did the lab. Other solutions would have been to change the admin distance for BGP externals to 111, or lower the OSPF admin distance for this route to 19. However, I also chose the backdoor command as the most elegent solution. I think in the real lab, the simple removal of the BGP advertisement would not earn you the points. IMHO. George. > Date: Fri, 14 Sep 2012 06:03:15 -0700 > From: [email protected] > To: [email protected] > Subject: [OSL | CCIE_RS] Lab 3-1 Troubleshooting Ticket 5 > > Spoiler alert: Do not read ahead if you have not done this lab/question yet! > > > Ticket 5 is as follows: > "The BGP peering between R1 and R2/R4 is flapping and needs to be stabilized. > Please correct the problem." > > > From my first look at R2 and R4, it appears that they are learning about > 1.1.1.1 (update source) through BGP which would of course cause problems. > The solution is to remove network 1.1.1.1 mask 255.255.255.255 from router 1, > but to me this seems like it would go against "keep the spirit of the config". > > What I did on R2 and R4: > > > router bgp 2456 > network 1.1.1.1 mask 255.255.255.255 backdoor > > This makes the preferred route to 1.1.1.1 over OSPF instead of BGP by making > the distance of the 1.1.1.1 route 200 and keeps the config intact. > > Is this a better/worse solution? Do I not understand the function of the BGP > backdoor? > > thanks, > Nick > _______________________________________________ > 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 > > http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
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