H3C Technologies H3C S7500E Series Switches - Manual (Page 403)

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IPv6 MBGP Configuration
When configuring IPv6 MBGP, go to these sections for information you are interested in:
z IPv6 MBGP Overview
z IPv6 MBGP Configuration Task List
z Configuring IPv6 MBGP Basic Functions
z Controlling Route Distribution and Reception
z Configuring IPv6 MBGP Route Attributes
z Tuning and Optimizing IPv6 MBGP Networks
z Configuring a Large Scale IPv6 MBGP Network
z Displaying and Maintaining IPv6 MBGP
z IPv6 MBGP Configuration Example
z The term “router” in this document refers to a router in a generic sense or an Ethernet
switch running routing protocols.
z This chapter describes only configuration for IPv6 MBGP. For IPv6 BGP related information,
refer to IPv6 BGP Configuration in the Layer 3 - IP Routing Configuration Guide.
z EA cards (such as LSQ1GP12EA and LSQ1TGX1EA) do not support IPv6 features.
IPv6 MBGP Overview
BGP-4 is capable of carrying routing information for IPv4 only. IETF defined multi-protocol BGP
extensions to carry routing information for multiple network layer protocols.
For an IPv6 network, the IPv6 multicast topology need be different from the IPv6 unicast
topology. To meet the requirement, the multi-protocol BGP extensions enable IPv6 BGP to carry
the IPv6 unicast Network Layer Reachability Information (NLRI) and IPv6 multicast NLRI
separately, and the multicast NLRI is used to perform reverse path forwarding (RPF) exclusively.
In this way, route selection for a destination through the IPv6 unicast routing table and through
the IPv6 multicast routing table will have different results, ensuring the normal unicast and
multicast operation across ASs.
Multi-protocol BGP is defined in RFC 2858 (Multiprotocol Extensions for BGP-4).
Multi-protocol BGP for IPv6 multicast is referred to as IPv6 multicast BGP (IPv6 MBGP).