Gratuitous Neighbor Discovery: Creating Neighbor Cache Entries on First-Hop Routers

Document Type Replaced Internet-Draft (6man WG)
Author Jen Linkova 
Last updated 2020-01-09 (latest revision 2019-11-26)
Replaced by draft-ietf-6man-grand
Stream IETF
Intended RFC status (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state Adopted by a WG
Document shepherd No shepherd assigned
IESG IESG state Replaced by draft-ietf-6man-grand
Consensus Boilerplate Unknown
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This Internet-Draft is no longer active.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 updates [RFC4861] to allow routers to proactively create a Neighbor Cache entry when a new IPv6 address is assigned to a host. It also updates [RFC4862] and recommends hosts to send unsolicited Neighbor Advertisements upon assigning a new IPv6 address. The proposed change will minimize the delay and packet loss when a host initiate connections to off-link destination from a new IPv6 address.


Jen Linkova (

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