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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