Advertising IPv4 Network Layer Reachability Information (NLRI) with an IPv6 Next Hop

Metadata

Publisher: IETF
Doc Type: Standard
Pages: 12
Abstract: Multiprotocol BGP (MP-BGP) specifies that the set of usable next-hop address families is determined by the Address Family Identifier (AFI) and the Subsequent Address Family Identifier (SAFI). The 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 IPv4 Network Layer Reachability Information (NLRI) or VPN-IPv4 NLRI. This document specifies the extensions necessary to allow the advertising of IPv4 NLRI or 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 IPv4 NLRI or VPN-IPv4 NLRI to also belong to the IPv6 protocol, the encoding of the next hop to determine which of the protocols the address actually belongs to, and a BGP Capability allowing MP-BGP peers to dynamically discover whether they can exchange IPv4 NLRI and VPN-IPv4 NLRI with an IPv6 next hop. This document obsoletes RFC 5549.
Publication Date: 2020-11-01
Status Note: Proposed Standard
DOI: 10.17487/RFC8950
Link: https://doi.org/10.17487/RFC8950
Author(s): Stephane Litkowski
Swadesh Agrawal
Krishnaswamy Ananthamurthy
Keyur Patel
Keyword(s): BGP, MVPN, L3VPN

Latest version of IETF RFC 8950

Document Versions — IETF RFC 8950

▶ IETF RFC 8950 (2020-11-01)

THIS DOC [ACTIVE] [LATEST VERSION]

Normative Reference(s)

IETF RFC 2119 [Active*]
IETF RFC 2545 [Active*]
IETF RFC 4291 [Active*]
IETF RFC 4364 [Active*]
IETF RFC 4760 [Active*]
IETF RFC 5492 [Active*]
IETF RFC 8174 [Active*]
IETF RFC 8277 [Active*]

Bibliographic Reference(s)

IANA, "Subsequent Address Family Identifiers (SAFI) Parameters", <https://www.iana.org/assignments/safi-namespace/>. EXTERNAL
IANA, "Address Family Numbers", <https://www.iana.org/assignments/address-family-numbers/>. EXTERNAL
IANA, "Capability Codes", <https://www.iana.org/assignments/capability-codes/>. EXTERNAL
IETF RFC 4272 [Active*]
IETF RFC 4659 [Active*]
IETF RFC 4684 [Active*]
IETF RFC 4798 [Active*]
IETF RFC 4925 [Active*]
IETF RFC 5549 [Superseded*]
IETF RFC 5565 [Active*]
RFC6074 — RFC6074 EXTERNAL
IETF RFC 6513 [Active*]
IETF RFC 6514 [Active*]

Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/RFC8950.json

Supersedes:

IETF RFC 5549 [Superseded*]

Reference Tree

Explore all references and references to this document, as a navigable tree.

Open Reference Tree

Reference this Doc

Plain text (ISO 690 compliant)

Preview:

IETF RFC 8950, Advertising IPv4 Network Layer Reachability Information (NLRI) with an IPv6 Next Hop. Available at https://doi.org/10.17487/RFC8950

Snippet:

IETF RFC 8950, Advertising IPv4 Network Layer Reachability Information (NLRI) with an IPv6 Next Hop. Available at https://doi.org/10.17487/RFC8950

HTML (ISO 690 compliant)

Preview:

IETF RFC 8950, Advertising IPv4 Network Layer Reachability Information (NLRI) with an IPv6 Next Hop. Available at https://doi.org/10.17487/RFC8950

Snippet:

<span class="citation"><cite>IETF RFC 8950</cite>, Advertising IPv4 Network Layer Reachability Information (NLRI) with an IPv6 Next Hop. Available at <a href="https://doi.org/10.17487/RFC8950" target="_blank" rel="noopener">https://doi.org/10.17487/RFC8950</a></span>

SMPTE's HTML Pub

Preview:

IETF RFC 8950, Advertising IPv4 Network Layer Reachability Information (NLRI) with an IPv6 Next Hop
doi: 10.17487/RFC8950
url: https://doi.org/10.17487/RFC8950

Snippet:

<li>
<cite id="bib-rfc8950">IETF RFC 8950</cite>, Advertising IPv4 Network Layer Reachability Information (NLRI) with an IPv6 Next Hop
<span class="doi">10.17487/RFC8950</span>
</li>

Referenced By

IETF RFC 9386 [Active*]