CCNP SPCOR 350-501 · Networking · BGP

BGP in the SP core: route reflectors and next-hop-self

Why an SP core runs iBGP between loopbacks, why a full mesh does not scale and how route reflectors fix it without loops (ORIGINATOR_ID and CLUSTER_LIST), why edge routers set next-hop-self, and the order of the BGP best-path decision — with the IGP metric to the next hop coming from IS-IS.

40 min read9 chapters2 labs15 quiz7 scenarios15 interview Q&A

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Inside this module

  • Lab · A BGP-free core behind a route reflector
  • Lab · Troubleshoot: the reflector that reflects nothing
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