BGP for CCNP ENCOR, Part 1: Fundamentals, Autonomous Systems, and eBGP vs iBGP
Part 1 of a four-part BGP series for CCNP ENCOR 350-401 v1.2: why BGP is a policy protocol rather than a metric protocol, autonomous systems and ASN ranges, the rules that separate eBGP from iBGP, the iBGP full-mesh and next-hop problems, BGP's three tables, and four hands-on labs with answers.
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September 18, 2026