newbie: bhyve basic networking problem

[Russell L. Carter]

Greetings,

I have installed the latest -current snapshot iso as a bhyve guest on
a -stable host, and I am unable to ping the network from either side.
This is my first attempt at bhyve virtualization so likely I have made
an error somewhere.

I'm using the git iohyve script to orchestrate the install, but from
looking at the commits and the script source (which is written quite
beautifully), I don't see anything troublesome.

So here is what I see from inside the bhyve FreeBSD-current VM:

root at freebsd-current:~ # route -n show default
    route to: 0.0.0.0
destination: 0.0.0.0
        mask: 0.0.0.0
     gateway: 10.0.10.5
         fib: 0
   interface: vtnet0
       flags: <UP,GATEWAY,DONE,STATIC>
  recvpipe  sendpipe  ssthresh  rtt,msec    mtu        weight    expire
        0         0         0         0      1500         1         0

root at freebsd-current:~ # ifconfig -a
vtnet0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> 
metric 0 mtu 1500
         options=80028<VLAN_MTU,JUMBO_MTU,LINKSTATE>
         ether 00:a0:98:98:e6:ad
         inet 10.0.10.20 netmask 0xffffff00 broadcast 10.0.10.255
         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
         media: Ethernet 10Gbase-T <full-duplex>
         status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
         options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
         inet6 ::1 prefixlen 128
         inet6 fe80::1%lo0 prefixlen 64 scopeid 0x2
         inet 127.0.0.1 netmask 0xff000000
         nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
         groups: lo

And then, on the host side:

root at feyerabend> ifconfig -a
em0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 
mtu 1500
 
options=4219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC,VLAN_HWTSO>
         ether 00:15:17:bc:29:ba
         inet 10.0.10.6 netmask 0xffffff00 broadcast 10.0.10.255
         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
         media: Ethernet autoselect (1000baseT <full-duplex>)
         status: active
em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
 
options=4019b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,VLAN_HWTSO>
         ether 00:15:17:bc:29:bb
         inet 10.0.11.6 netmask 0xffffff00 broadcast 10.0.11.255
         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
         media: Ethernet autoselect (1000baseT <full-duplex>)
         status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
         options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
         inet6 ::1 prefixlen 128
         inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
         inet 127.0.0.1 netmask 0xff000000
         nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 
1500
         description: iohyve-bridge
         ether 02:63:ec:5e:4b:00
         nd6 options=1<PERFORMNUD>
         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: em0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
                 ifmaxaddr 0 port 1 priority 128 path cost 20000
tap0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
         description: iohyve-FreeBSD-current
         options=80000<LINKSTATE>
         ether 00:bd:81:b8:05:00
         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
         media: Ethernet autoselect
         status: active
         Opened by PID 1370
root at feyerabend> route -n show default
    route to: 0.0.0.0
destination: 0.0.0.0
        mask: 0.0.0.0
     gateway: 10.0.10.5
         fib: 0
   interface: em0
       flags: <UP,GATEWAY,DONE,STATIC>
  recvpipe  sendpipe  ssthresh  rtt,msec    mtu        weight    expire
        0         0         0         0      1500         1         0
root at feyerabend>

Any ideas appreciated.

Best regards,
Russell