A New Internet-Draft is available from the on-line Internet-Drafts
directories.
This draft is a work item of the Softwires Working Group of the IETF.
Title : Advertising an IPv4 NLRI with an IPv6 Next Hop
Author(s) : F. Le Faucheur, E. Rosen
Filename : draft-ietf-softwire-v4nlri-v6nh-00.txt
Pages : 12
Date : 2008-1-18
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) or
a VPN-IPv4 NLRI. This document specifies the extensions necessary to
allow advertising an IPv4 NLRI or a VPN-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 or VPN-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 exchange IPv4 NLRI and VPN-IPv4 NLRI with an IPv6 Next Hop.
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