Border Gateway ProtocolAutonomous System NumbersPath AttributesLoop PreventionAddress FamiliesBGP SessionsInter-Router CommunicationBGP MessagesOPENKEEPALIVEUPDATENOTIFICATION MessageBGP Neighbor StatesIdleConnectActiveOpenSentOpenConfirmEstablishedBasic BGP ConfigurationIOSIOS XRNX-OSVerification of BGP SessionsPrefix AdvertisementBGP Best-Path CalculationRoute Filtering and ManipulationIBGPIBGP Full Mesh RequirementPeering via Loopback AddressesEBGPEBGP and IBGP TopologiesNext-Hop ManipulationIBGP ScalabilityRoute ReflectorsLoop Prevention in Route ReflectorsOut-of-Band Route ReflectorsConfederationsBGP CommunitiesRoute SummarizationAggregate-AddressFlexible Route SuppressionAtomic AggregateRoute Aggregation with AS_SETRoute Aggregation with Selective Advertisement of AS-SETDefault Route AdvertisementDefault Route Advertisement per NeighborRemove Private ASAllow ASLocalASSummaryReferences