H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – IPv6 Routing
H3C S7500E Series Ethernet Switches Chapter 5 IPv6 BGP Configuration
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Chapter 5 IPv6 BGP Configuration
 Note:
z This chapter describes only configuration for IPv6 BGP. For other related
information, 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 Overview
z Configuration Task List
z Configuring IPv6 BGP Basic Functions
z Controlling Route Distribution and Reception
z Configuring IPv6 BGP Route Attributes
z Tuning and Optimizing IPv6 BGP Networks
z Configuring a Large Scale IPv6 BGP Network
z Displaying and Maintaining IPv6 BGP Configuration
z IPv6 BGP Configuration Examples
z Troubleshooting IPv6 BGP Configuration
5.1 IPv6 BGP Overview
BGP-4 manages only IPv4 routing information, thus other network layer protocols such
as IPv6 are not supported.
To support multiple network layer protocols, IETF extended BGP-4 by introducing IPv6
BGP that is defined in RFC 2858 (multiprotocol extensions for BGP-4).
To implement IPv6 support, IPv6 BGP puts IPv6 network layer information into the
attributes 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 hop
information of reachable routes.
z MP_UNREACH_NLRI: Multiprotocol Unreachable NLRI, for withdrawal of
unreachable routes.
The NEXT_HOP attribute of IPv6 BGP is identified by an IPv6 unicast address or IPv6
local link address.