Operation Manual – IPv6 RoutingH3C S7500E Series Ethernet Switches Chapter 5 IPv6 BGP Configuration5-1Chapter 5 IPv6 BGP ConfigurationNote:z This chapter describes only configuration for IPv6 BGP. For other relatedinformation, refer to the part discussing IPv4 routing.z At present, the LSQ1GP12EA boards in the S7500E series do not support IPv6.When configuring IPv6 BGP, go to these sections for information you are interested in:z IPv6 BGP Overviewz Configuration Task Listz Configuring IPv6 BGP Basic Functionsz Controlling Route Distribution and Receptionz Configuring IPv6 BGP Route Attributesz Tuning and Optimizing IPv6 BGP Networksz Configuring a Large Scale IPv6 BGP Networkz Displaying and Maintaining IPv6 BGP Configurationz IPv6 BGP Configuration Examplesz Troubleshooting IPv6 BGP Configuration5.1 IPv6 BGP OverviewBGP-4 manages only IPv4 routing information, thus other network layer protocols suchas IPv6 are not supported.To support multiple network layer protocols, IETF extended BGP-4 by introducing IPv6BGP that is defined in RFC 2858 (multiprotocol extensions for BGP-4).To implement IPv6 support, IPv6 BGP puts IPv6 network layer information into theattributes of network layer reachable information (NLRI) and NEXT_HOP.NLRI attribute of IPv6 BGP involves:z MP_REACH_NLRI: Multiprotocol Reachable NLRI, for advertisement of next hopinformation of reachable routes.z MP_UNREACH_NLRI: Multiprotocol Unreachable NLRI, for withdrawal ofunreachable routes.The NEXT_HOP attribute of IPv6 BGP is identified by an IPv6 unicast address or IPv6local link address.
