Ipv6 Bgp Overview - 3Com MSR 50 Series Configuration Manual

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IPv6 BGP Overview

IP 6 BGP C
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This chapter describes only configuration for IPv6 BGP. For BGP related
information, refer to
When configuring IPv6 BGP, go to these sections for information you are
interested in:
"IPv6 BGP Overview" on page 1015
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"IPv6 BGP Configuration Task List" on page 1016
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"Configuring IPv6 BGP Basic Functions" on page 1017
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"Controlling Route Distribution and Reception" on page 1020
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"Configuring IPv6 BGP Route Attributes" on page 1023
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"Adjusting and Optimizing IPv6 BGP Networks" on page 1024
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"Configuring a Large Scale IPv6 BGP Network" on page 1027
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"Configuring 6PE" on page 1029
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"Displaying and Maintaining IPv6 BGP Configuration" on page 1033
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"IPv6 BGP Configuration Examples" on page 1034
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"Troubleshooting IPv6 BGP Configuration" on page 1041
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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:
MP_REACH_NLRI: Multiprotocol Reachable NLRI, for advertisement of next hop
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information of reachable routes.
MP_UNREACH_NLRI: Multiprotocol Unreachable NLRI, for withdrawal of
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unreachable routes.
The NEXT_HOP attribute of IPv6 BGP is identified by an IPv6 unicast address or
IPv6 local link address.
IPv6 BGP utilizes BGP multiprotocol extensions for application in IPv6 networks.
The original messaging and routing mechanisms of BGP are not changed.
ONFIGURATION
"BGP Configuration" on page 825.