[Bug 271456] SR-IOV: mce(4) with bhyve: can't ping the vm

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271456

--- Comment #4 from benoitc <benoitc@enki-multimedia.eu> ---
same result with jails. Are virtual devices created with srv-io working in a
bridge? I can set the ip of the interface, but once I put it in the bridge it
doesn't work.

With jail, here is the bastille configuration:

```
testing {
  devfs_ruleset = 13;
  enforce_statfs = 2;
  exec.clean;
  exec.consolelog = /var/log/bastille/testing_console.log;
  exec.start = '/bin/sh /etc/rc';
  exec.stop = '/bin/sh /etc/rc.shutdown';
  host.hostname = testing;
  mount.devfs;
  mount.fstab = /usr/local/bastille/jails/testing/fstab;
  path = /usr/local/bastille/jails/testing/root;
  securelevel = 2;

  vnet;
  vnet.interface = e0b_bastille0;
  exec.prestart += "jib addm bastille0 mce2";
  exec.prestart += "ifconfig e0a_bastille0 description \"vnet host interface
for Bastille jail testing\"";
  exec.poststop += "jib destroy bastille0";
}
```

/etc/rc.conf:

```
syslogd_flags="-ss"
sendmail_enable="NO"
sendmail_submit_enable="NO"
sendmail_outbound_enable="NO"
sendmail_msp_queue_enable="NO"
cron_flags="-J 60"
ifconfig_e0b_bastille0_name="vnet0"
ifconfig_vnet0="inet6 XXXX:XXXX:XXXX:102::20/64"
defaultrouter="XXXX:XXXX:XXXX:102::1"
```

On the host network s configured like this:

```
ce2: flags=8963<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu
9000
       
options=7ead00b9<RXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,VLAN_HWFILTER,VLAN_HWTSO,LINKSTATE,RXCSUM_IPV6,HWRXTSTMP,NOMAP,TXTLS4,TXTLS6,VXLAN_HWCSUM,VXLAN_HWTSO>
        ether a2:5b:2e:82:9f:09
        inet 0.0.5.220 netmask 0xff000000 broadcast 0.255.255.255
        inet6 fe80::a05b:2eff:fe82:9f09%mce2 prefixlen 64 tentative scopeid 0x6
        media: Ethernet 25GBase-SR <full-duplex,rxpause,txpause>
        status: active
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
mce2bridge: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu
9000
        ether 58:9c:fc:10:fc:41
        id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
        maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200
        root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
        member: e0a_bastille0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
                ifmaxaddr 0 port 8 priority 128 path cost 2000
        member: mce2 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
                ifmaxaddr 0 port 6 priority 128 path cost 800
        groups: bridge
        nd6 options=9<PERFORMNUD,IFDISABLED>
e0a_bastille0: flags=8963<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST>
metric 0 mtu 9000
        description: vnet host interface for Bastille jail testing
        options=8<VLAN_MTU>
        ether 0a:20:98:82:9f:09
        hwaddr 02:00:91:24:1e:0a
        groups: epair
        media: Ethernet 10Gbase-T (10Gbase-T <full-duplex>)
        status: active
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
```

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