RFC 4861, "Neighbor Discovery for IP version 6 (IPv6)", September 2007

Errata ID: 2797
Status: Held for Document Update
Type: Technical
Publication Format(s) : TEXT
Reported By: Alin Năstac
Date Reported: 2011-05-05
Held for Document Update by: Brian Haberman

Section Appendix C says:

!INCOMPLETE     NA, Solicited=1,        -                   REACHABLE
                Override=0
                Same link-layer
                address as cached
                or no link-layer 
                address

It should say:

PROBE           NA, Solicited=1,        -                   REACHABLE
                Override=0
                Same link-layer
                address as cached
                or no link-layer 
                address

Notes:

NA having Solicited=1 are supposed to confirm two-way connectivity. In order to prove that, NA transmission has to be triggered by an NS sent by local host. Since {REACHABLE,STALE,DELAY} states deny that local host has sent a NS (they're sent only in INCOMPLETE or PROBE states), receiving a NA with Solicited=1 cannot verify 2-way connectivity, therefore it should be ignored.

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