Ipv6 Bgp Configuration; Ipv6 Bgp Overview - HP 3600 v2 series Configuration Manual

IPv6 BGP configuration

NOTE:
The term
•
This chapter describes only configuration for IPv6 BGP. For BGP related information, see the chapter
•
"BGP configuration."
• The 3600 v2 SI Switch Series does not support IPv6 BGP.

IPv6 BGP overview

BGP-4 was designed to carry only IPv4 routing information, so other network layer protocols such as IPv6
are not supported.
To support multiple network layer protocols, IETF extended BGP-4 by introducing Multiprotocol BGP
(MP-BGP), which is defined in RFC 2858 (multiprotocol extensions for BGP-4).
For brevity purposes, MP-BGP for IPv6 is called "IPv6 BGP."
IPv6 BGP puts IPv6 network layer information into the attributes of Network Layer Reachability
Information (NLRI) and NEXT_HOP.
The NLRI attribute of IPv6 BGP involves the following:
MP_REACH_NLRI: Multiprotocol Reachable NLRI, for advertising reachable route and next hop
•
information.
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.
IPv6 BGP has the same messaging and routing mechanisms as BGP.
router
in this document refers to both routers and Layer 3 switches.
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