From owner-freebsd-net@freebsd.org  Mon Jan  4 14:17:26 2021
Return-Path: <owner-freebsd-net@freebsd.org>
Delivered-To: freebsd-net@mailman.nyi.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.nyi.freebsd.org (Postfix) with ESMTP id 5F8DC4D7806;
 Mon,  4 Jan 2021 14:17:26 +0000 (UTC)
 (envelope-from lutz@donnerhacke.de)
Received: from annwfn.iks-jena.de (annwfn.iks-jena.de [IPv6:2001:4bd8::19])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 4D8d4P2qQ8z4m9B;
 Mon,  4 Jan 2021 14:17:25 +0000 (UTC)
 (envelope-from lutz@donnerhacke.de)
X-SMTP-Sender: IPv6:2001:4bd8:59:1:172:27:107:102
Received: from lyoness (lyoness.intern.iks-service.de
 [IPv6:2001:4bd8:59:1:172:27:107:102])
 by annwfn.iks-jena.de (8.15.2/8.15.2) with ESMTP id 104EHF1b008866;
 Mon, 4 Jan 2021 15:17:15 +0100
From: "Lutz Donnerhacke" <lutz@donnerhacke.de>
To: <freebsd-questions@freebsd.org>, <freebsd-net@freebsd.org>
Subject: Re: FreeBSD does not reply to IPv6 Neighbor Solicitations
Date: Mon, 4 Jan 2021 15:17:15 +0100
Message-ID: <006901d6e2a4$4d9d80d0$e8d88270$@donnerhacke.de>
MIME-Version: 1.0
Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: 7bit
X-Mailer: Microsoft Outlook 16.0
Thread-Index: AdbipEt5CzHJZB3OSuCksP/fxhvDNQ==
Content-Language: de
X-Rspamd-Queue-Id: 4D8d4P2qQ8z4m9B
X-Spamd-Bar: -
Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none;
 spf=none (mx1.freebsd.org: domain of lutz@donnerhacke.de has no SPF policy
 when checking 2001:4bd8::19) smtp.mailfrom=lutz@donnerhacke.de
X-Spamd-Result: default: False [-1.06 / 15.00]; FAKE_REPLY(1.00)[];
 ARC_NA(0.00)[]; MID_RHS_MATCH_FROM(0.00)[];
 FROM_HAS_DN(0.00)[];
 RBL_DBL_DONT_QUERY_IPS(0.00)[2001:4bd8::19:from];
 TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000];
 MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[];
 DMARC_NA(0.00)[donnerhacke.de]; AUTH_NA(1.00)[];
 SPAMHAUS_ZRD(0.00)[2001:4bd8::19:from:127.0.2.255];
 RCVD_TLS_LAST(0.00)[]; NEURAL_HAM_SHORT(-0.96)[-0.962];
 RCPT_COUNT_TWO(0.00)[2]; NEURAL_HAM_MEDIUM(-1.00)[-1.000];
 R_SPF_NA(0.00)[no SPF record]; FROM_EQ_ENVFROM(0.00)[];
 R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+];
 ASN(0.00)[asn:15725, ipnet:2001:4bd8::/29, country:DE];
 RCVD_COUNT_TWO(0.00)[2];
 MAILMAN_DEST(0.00)[freebsd-questions,freebsd-net]
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.34
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-net>,
 <mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net/>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-net>,
 <mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 04 Jan 2021 14:17:26 -0000

> Victor Sudakov wrote:
> > Dear Colleagues,
> >
> > Why could it be that a FreeBSD 12.2 host does not reply to ICMPv6
> > Neighbor Solicitations from the router?
> 
> Any ideas please?

Thank you for pointing this out.
I do have an similar effect, after upgrading, and you point me to a good
direction.
I'll investigate and report back.

Lutz Donnerhacke