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Date:      Thu, 29 Aug 2019 16:54:20 +0000
From:      bugzilla-noreply@freebsd.org
To:        jail@FreeBSD.org
Subject:   [Bug 240106] VNET issue with ARP and routing sockets in jails
Message-ID:  <bug-240106-29815-46I7IybfUL@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-240106-29815@https.bugs.freebsd.org/bugzilla/>
References:  <bug-240106-29815@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D240106

--- Comment #2 from John Westbrook <john.westbrook@gmail.com> ---
I have SR-IOV configured as described in this thread:

https://forums.freebsd.org/threads/sr-iov-chelsio-error-in-guest.70653

such that cxlv[0-3] are shown in ifconfig. The jail.conf is:

vnet;
vnet.interface =3D "vnet0";
exec.prestart  =3D "ifconfig ${vnet0} name vnet0";
exec.poststop  =3D "ifconfig vnet0 name ${vnet0}";

exec.start +=3D "/bin/sh /etc/rc";
exec.stop =3D "/bin/sh /etc/rc.shutdown";
exec.consolelog =3D "/var/log/${name}.log";
host.hostname =3D "${name}";
path =3D "/jail/${name}";

j1 {
   $vnet0 =3D "cxlv1";
}

j2 {
   $vnet0 =3D "cxlv2";
}

There are two hosts direct connected via cxl0. The problem is visible when
pinging (1) between jails on the same host and (2) from an affected jail on
host 1 to host 2. On an unaffected host both of these operations succeed.

Using tcpdump on the physical (cxl) and virtual (cxlv) interfaces shows the=
 ARP
requests and responses, but in an affected jail the ARP tables aren't updat=
ed.

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