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Link Local Next Hop Handling for BGP
draft-white-linklocalnh-02

Document Type Expired Internet-Draft (individual)
Authors Russ White , Donald Sharp , Dinesh Dutt , Biswajit Sadhu , Jeff Tantsura , Donatas Abraitis
Last updated 2022-05-11 (Latest revision 2021-11-07)
Stream (None)
Intended RFC status (None)
Formats
Expired & archived
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:

Abstract

BGP, described in [RFC4271], was originally designed to provide reachability between domains and between the edges of a domain. As such, BGP assumes the next hop towards any reachable destination may not reside on the advertising speaker, but rather may either be through a router connected to the same subnet as the speaker, or through a router only reachable by traversing multiple hops through the network. Because of this, BGP does not recognize the use of IPv6 link local addresses, as described in [RFC4291], as a valid next hop for forwarding purposes. However, BGP speakers are now often deployed on point-to-point links in networks where multihop reachability of any kind is not assumed or desired (all next hops are assumed to be the speaker reachable through a directly connected point-to-point link). This is common, for instance, in data center fabrics. In these situations, a global IPv6 address is not required for the advertisement of reachability information; in fact, providing global IPv6 addresses in these kinds of networks can be detrimental to Zero Touch Provisioning (ZTP). This draft standardizes the operation of BGP over a point-to-point link using link local IPv6 addressing only.

Authors

Russ White
Donald Sharp
Dinesh Dutt
Biswajit Sadhu
Jeff Tantsura
Donatas Abraitis

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)