Network unreachable in bhyve

[Grzegorz Junka]

On 12/09/2016 12:44, Lars Engels wrote:
> 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.

Why not? The handbook doesn't say that only specific devices can be bridged?