In question 2.4.3 when the links btw A1 and B1 fails, it is said that when A1 and B1 detects the failure, A1 and B1 will delete the entries learned over this link from their RIB-in tables, and update related entries in their forwarding tables. Up to now I have no problems. But after, it is said that they will also advertise the changes (I-BGP) to other BGP routers within their domains. What do they actually advertize? The routes they have now are routes learnt by I-BGP from A4 and B4 respectively, so they shouldn't be advertising them. Am I missing sthg?
Thank you very much for your help.
Posted by Ghita Mezzour on Tuesday 5 December 2006 at 21:06