Ipv6 Bgp Configuration; Ipv6 Bgp Overview - 3Com S7906E Configuration Manual

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IPv6 BGP Configuration

The term "router" in this document refers to a router in a generic sense or a Layer 3 switch.
EA boards (such as LSQ1GP12EA and LSQ1TGX1EA) do not support IPv6 features.
This chapter describes only configuration for IPv6 BGP. For BGP related information, refer to BGP
Configuration in the IP Routing Volume.
When configuring IPv6 BGP, go to these sections for information you are interested in:

IPv6 BGP Overview

Configuration Task List
Configuring IPv6 BGP Basic Functions
Controlling Route Distribution and Reception
Configuring IPv6 BGP Route Attributes
Tuning and Optimizing IPv6 BGP Networks
Configuring a Large Scale IPv6 BGP Network
Displaying and Maintaining IPv6 BGP
IPv6 BGP Configuration Examples
Troubleshooting IPv6 BGP Configuration
IPv6 BGP Overview
BGP-4 was designed to carry only IPv4 routing information, and thus 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).
MP-BGP for IPv6 is referred to as IPv6 BGP for short.
IPv6 BGP puts IPv6 network layer information into the attributes of network layer reachable information
(NLRI) and NEXT_HOP.
The NLRI attribute of IPv6 BGP involves:
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.
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