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Neighbor Cache Entries on First-Hop Routers: Operational Considerations

Document Type Replaced Internet-Draft (v6ops WG)
Author Jen Linkova
Last updated 2021-03-10 (Latest revision 2020-09-06)
Replaces draft-linkova-v6ops-nd-cache-init
Replaced by RFC 9131
Stream Internet Engineering Task Force (IETF)
Intended RFC status Informational
Expired & archived
plain text xml htmlized pdfized bibtex
IOTDIR Telechat review Ready with Issues
Stream WG state Submitted to IESG for Publication
Document shepherd Jordi Palet Martinez
Shepherd write-up Show Last changed 2020-07-14
IESG IESG state Replaced by draft-ietf-6man-grand
Action Holders
Consensus boilerplate Yes
Telechat date (None)
Responsible AD Warren "Ace" Kumari
Send notices to Jordi Palet Martinez <>
IANA IANA review state Version Changed - Review Needed
This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at:


Neighbor Discovery (RFC4861) is used by IPv6 nodes to determine the link-layer addresses of neighboring nodes as well as to discover and maintain reachability information. This document discusses how the neighbor discovery state machine on a first-hop router is causing user-visible connectivity issues when a new (not being seen on the network before) IPv6 address is being used. The various approaches to mitigate the problem are described, with the proposed solution fully documented in I-D.ietf-6man-grand.


Jen Linkova

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