NANOG 21 Exterior Routing tutorial 2/17/2001 16 Bilateral Peering Big ISP 1 Big ISP 2 eBGP Relationship Exchange of customer routes only Some aggregation No infrastructure routes Highest bandwidth requirement Tier 1 Provider Does not buy transit service from anyone Has default-free routers Gets all routes from bilateral/multilateral peering Total RIB size of 1.3-1.5 * DefaultFreeZone (D)
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