CCIE Network Design FAQ: BGP Cores and Network Scalability Figure: The Network Core Q1. What is an EGP? Answer: An EGP is an Exterior Gateway Protocol, which is a protocol designed to carry routing information between ASs. BGP is an EGP. Q2. What prevents iBGP from being an effective IGP? Answer: iBGP cannot determine if a path within an AS is a loop because the AS … [Read more...]