A New Internet-Draft is available from the on-line Internet-Drafts
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Title : Advertising an IPv4 NLRI with an IPv6 Next Hop
Author(s) : F. Le Faucheur, E. Rosen
Filename : draft-lefaucheur-idr-v4nlri-v6nh-00.txt
Pages : 11
Date : 2006-10-12
MultiProtocol-BGP (MP-BGP) specifies that the set of Network Layer
protocols to which the address carried in the Next Hop field may
belong is determined by the Address Family Identifier (AFI) and the
Subsequent Address Family Identifier (SAFI). The current AFI/SAFI
definitions for the IPv4 address family only have provisions for
advertising a Next Hop address that belongs to the IPv4 protocol when
advertising an IPv4 Network Layer Reachability Information (NLRI).
This document specifies the extensions necessary to allow advertising
an IPv4 NLRI with a Next Hop address that belongs to the IPv6
protocol. This comprises an extension of the AFI/SAFI definitions to
allow the address of the Next Hop for an IPv4 NLRI to also belong to
the IPv6 protocol, the encoding of the Next Hop in order to determine
which of the protocols the address actually belongs to, and a new BGP
Capability allowing MP-BGP Peers to dynamically discover whether they
can extend IPv4 NLRI with an IPv6 Next Hop.
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