Jul 2, 2014

BGP Routing Issues Case Study 2 - Unreachable to the learned BGP route

If you have only one BGP router with multi-home ISP uplinks, its much easier to maintain the BGP routing table because it was totally under centralized control.

But as network continue to expand and we start to consider the redundancy issue, then your network will add additional multiple BGP speakers and you must enable IBGP between these BGP routers.