Network unreachable in bhyve

[Lars Engels]

On Mon, Sep 12, 2016 at 12:21:48PM +0000, Grzegorz Junka wrote:
> I am following the official guide:
> 
> https://www.freebsd.org/doc/handbook/virtualization-host-bhyve.html
> 
> After installing Centos6 and starting the guest there is no network 
> inside the VM:
> 
> [root at localhost ~]# ping 8.8.8.8
> connect: Network is unreachable
> [root at localhost ~]# ifconfig
> lo        Link encap:Local Loopback
>            inet addr:127.0.0.1  Mask:255.0.0.0
>            inet6 addr: ::1/128 Scope:Host
>            UP LOOPBACK RUNNING  MTU:65536  Metric:1
>            RX packets:4 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:0
>            RX bytes:260 (260.0 b)  TX bytes:260 (260.0 b)
> 
> On the host:
> 
> root at ultrabook:~ # ifconfig
> ath0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 2290
>          ether 74:2f:68:cb:d6:2a
>          nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
>          media: IEEE 802.11 Wireless Ethernet autoselect mode 11ng
>          status: associated
> 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>
> bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>          ether 02:6c:a7:69:c7:00
>          nd6 options=9<PERFORMNUD,IFDISABLED>
>          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: tap0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
>                  ifmaxaddr 0 port 4 priority 128 path cost 2000000
>          member: wlan0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
>                  ifmaxaddr 0 port 5 priority 128 path cost 66666
> tap0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
>          options=80000<LINKSTATE>
>          ether 00:bd:b1:16:00:00
>          nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>          media: Ethernet autoselect
>          status: active
>          Opened by PID 1918
> wlan0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
>          ether 74:2f:68:cb:d6:2a
>          inet 192.168.8.101 netmask 0xffffff00 broadcast 192.168.8.255
>          nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>          media: IEEE 802.11 Wireless Ethernet MCS mode 11ng
>          status: associated
>          ssid HUAWEI-7DC4 channel 1 (2412 MHz 11g ht/20) bssid 94:fe:22:5c:7d:c4
>          regdomain 96 indoor ecm authmode WPA2/802.11i privacy ON
>          deftxkey UNDEF AES-CCM 2:128-bit txpower 20 bmiss 7 scanvalid 60
>          protmode CTS ampdulimit 64k ampdudensity 8 shortgi wme burst
>          roaming MANUAL
> 
> I am using the following commands to load the kernel:
> 
>    grub-bhyve -m device.map -r hd0,msdos1 -M 2048 centos
>    ls (hd0,msdos1)/
>    linux (hd0,msdos1)/vmlinuz-2.6.32-642.el6.x86_64 root=/dev/mapper/VolGroup-lv_root
>    initrd (hd0,msdos1)/initramfs-2.6.32-642.el6.x86_64.img
>    boot
> 
> and start the guest:
> 
>    bhyve -c 4 -m 2048M -A -H -P \
>       -s 0:0,hostbridge \
>       -s 1:0,lpc \
>       -s 2:0,virtio-net,tap0 \
>       -s 3:0,virtio-blk,/dev/zvol/tank4/centos6v \
>       -l com1,stdio \
>       centos
> 
> The following has been added to /etc/rc.conf:
> 
> cloned_interfaces="bridge0 tap0"
> ifconfig_bridge0="addm wlan0 addm tap0"
> 
> /boot/loader.conf
> 
> vmm_load="YES"
> nmdm_load="YES"
> if_bridge_load="YES"
> if_tap_load="YES"
> 
> What I am missing?

You cannot bridge the tap and wlan device.
This only works with fixed ethernet devices. What you can do is set up
NATing with pf / ipfw so your bhyve VMs are "behind" your host.
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