Date: Mon, 04 Jan 2021 14:22:09 +0000 From: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> To: "Lutz Donnerhacke" <lutz@donnerhacke.de> Cc: freebsd-questions@freebsd.org, freebsd-net@freebsd.org Subject: Re: FreeBSD does not reply to IPv6 Neighbor Solicitations Message-ID: <C3AB2C0C-083C-425A-B4E9-75109ECDE089@lists.zabbadoz.net> In-Reply-To: <006901d6e2a4$4d9d80d0$e8d88270$@donnerhacke.de> References: <006901d6e2a4$4d9d80d0$e8d88270$@donnerhacke.de>
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On 4 Jan 2021, at 14:17, Lutz Donnerhacke wrote: >> 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. I’d start by checking netstat -s -p icmp6 and netstat -s -p ip6 for any suspicious counter updates. Another thing to do might be to turn on nd6 log/debugging by sysctl (sysctl net.inet6.icmp6.nd6_debug=0xff should do it) and keep an eye on the kernel messages. /bz
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