QEMU netstat -ian is missing multicast addresses for ethernet devices

Marco Moock <[email protected]> Mon, 2 Feb 2026 20:08:51 +0100

Newsgroups	gmane.os.freebsd.devel.net
Message-ID	<[email protected]>

Hello!

I noticed a strange situation on 2 different FreeBSD machines, both are
on qemu (one on a hoster, the other on my own Linux system).

For vtnet, em and le, I noticed that when an IPv6 address is assigned,
netstat -ain does not display the related multicast addresses (e.g. the
mandatory all-nodes or solicited node addresses). Although it displays
the multicast addresses for lo0.

On a virtualbox machine, those multicast addresses are displayed properly.

Can anyone confirm this and let me know where the issue is?

I assume it is listening on those addresses, as NDP is working.

[m@host ~]$ netstat -ain
Name     Mtu Network                Address                                Ipkts Ierrs Idrop       Opkts Oerrs  Coll
vtnet0  1500 <Link#1>               52:xyz                 2117994619     0     0  1488531816     0     0
vtnet0     - 7xyz/24        7xyz                     1457062414     -     -  1748874037     -     -
vtnet0     - fe80::%vtnet0/64       fe80::xyz%vtnet0       28527     -     -       77718     -     -
vtnet0     - 2xyz::/64  2xyz9                619818192     -     -   387236589     -     -
lo0    16384 <Link#2>               lo0                                  2544743     0     0     2544743     0     0
lo0        - ::1/128                ::1                                  1154156     -     -     1310680     -     -
                          ff01::1%lo0      
                          ff02::2:xyz
                          ff02::2:xyz
                          ff02::1%lo0      
                          ff02::1:ff00:1%lo
lo0        - fe80::%lo0/64          fe80::1%lo0                                0     -     -           0     -     -
                          ff01::1%lo0      
                          ff02::2:xyz
                          ff02::2:xyz
                          ff02::1%lo0      
                          ff02::1:ff00:1%lo
lo0        - 127.0.0.0/8            127.0.0.1                                  8     -     -     1390587     -     -
                          224.0.0.1        
[m@host ~]$ 

-- 
kind regards
Marco

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