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I have a Mac OSX host and an Ubuntu guest VM (via VirtualBox) and the guest VM needs access to an ethernet device (a GigE camera) that will be physically plugged into the host via an ethernet cable (using ethernet/thunderbolt adapter).

I have successfully booted my guest VM and can access the Internet fine using the default settings and NAT. The internet is coming to the host machine via WiFi. I don't need to modify this arrangement. I'd like to add a second network adapter to the VM with different settings so that I can access my camera without disrupting the functioning internet access over the first adapter. The camera does not need access to the internet.

When I plug this camera into the host computer, the camera shows up in the System->Network Preferences pane and is assigned an IP address (maybe by a DHCP server running on the host??) Additionally, when I run some test software on the host, it is able to discover the camera at the same IP address reported in the System-Network Preferences pane (and ifconfig on the host).

I basically need to get this same behavior in the guest - I need the guest to behave as though this ethernet camera were plugged directly into one of the ethernet ports on the guest machine.

So far here is what I have done:

Through VirtualBox GUI interface, Settings->Network, I have enabled a second network adapter, set to "Bridged Adapter", and with "Cable Connected" box checked.

Initially when I log into my guest, and run ifconfig I simply see that there is indeed another network interface (logical name enp0s8), but it has no IP address. I then modified (on the guest) the /etc/network/interfaces file to assign a static IP to the enp0s8 interface. Although I am unsure what to use for netmask and gateway, (and other stanzas) once I save the file and reboot the guest, I can run ifconfig and see that the guest enp0s8 interface has an IP. But none of my test software on the guest can find the camera.

What do I need to do to get this ethernet device to show up in my Guest VM?? Is there something I need to do to get the host OSX machine to "release" this interface and basically let the guest have complete control?

I feel like I must be missing a basic networking concept. Any insight would be helpful.

tcarman@inversionlabs.com wrote:the camera shows up in the System->Network Preferences pane and is assigned an IP address (maybe by a DHCP server running on the host??)

We need to see complete IP numbers, DHCP servers, gateways, netmasks, etc. With your camera connected and working, please post the output of the command:

```
ifconfig -a
```

tcarman@inversionlabs.com wrote:I have enabled a second network adapter, set to "Bridged Adapter", and with "Cable Connected" box checked.

Good. But "Bridged" to what?

tcarman@inversionlabs.com wrote:Although I am unsure what to use for netmask and gateway

Well, imagine us, who don't have the slightest clue, since you didn't include any numbers at all...

tcarman@inversionlabs.com wrote:Is there something I need to do to get the host OSX machine to "release" this interface and basically let the guest have complete control?

There might be. But it's too early to go that route. Post some numbers and then we can see how to proceed.

OK, great, I am sure this shows how little I know, but I wasn't sure which info would be relevant. Here is what I have collected:

Host computer, camera not connected, ifconfig -a

Code: Select all

amac@AlexMBP:~$ ifconfig -a
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
	options=1203<RXCSUM,TXCSUM,TXSTATUS,SW_TIMESTAMP>
	inet 127.0.0.1 netmask 0xff000000 
	inet6 ::1 prefixlen 128 
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1 
	nd6 options=201<PERFORMNUD,DAD>
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	ether 60:f8:1d:ab:35:32 
	inet6 fe80::1089:ddd2:e94a:af23%en0 prefixlen 64 secured scopeid 0x4 
	inet 10.0.0.5 netmask 0xffffff00 broadcast 10.0.0.255
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect
	status: active
p2p0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 2304
	ether 02:f8:1d:ab:35:32 
	media: autoselect
	status: inactive
awdl0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1484
	ether 42:86:84:93:b9:f6 
	inet6 fe80::4086:84ff:fe93:b9f6%awdl0 prefixlen 64 scopeid 0x6 
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect
	status: active
en1: flags=963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX> mtu 1500
	options=60<TSO4,TSO6>
	ether 72:00:07:28:57:d0 
	media: autoselect <full-duplex>
	status: inactive
en2: flags=963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX> mtu 1500
	options=60<TSO4,TSO6>
	ether 72:00:07:28:57:d1 
	media: autoselect <full-duplex>
	status: inactive
bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=63<RXCSUM,TXCSUM,TSO4,TSO6>
	ether 72:00:07:28:57:d0 
	Configuration:
		id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
		maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
		root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
		ipfilter disabled flags 0x2
	member: en1 flags=3<LEARNING,DISCOVER>
	        ifmaxaddr 0 port 7 priority 0 path cost 0
	member: en2 flags=3<LEARNING,DISCOVER>
	        ifmaxaddr 0 port 8 priority 0 path cost 0
	nd6 options=201<PERFORMNUD,DAD>
	media: <unknown type>
	status: inactive
utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000
	inet6 fe80::cb3f:8c63:db:a78%utun0 prefixlen 64 scopeid 0xa 
	nd6 options=201<PERFORMNUD,DAD>
utun1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
	inet6 fe80::955:6ae9:e998:7b33%utun1 prefixlen 64 scopeid 0xb 
	nd6 options=201<PERFORMNUD,DAD>

And here is the host, with the camera connected and functioning. I should mention that the camera is PoE (power over ethernet), so the device seems to turn on and auto-start whenever it is plugged in. It looks to me that the device gets interface en4, and is assigned an IP, although I am not sure who/what takes care of assigning this address?? Also note that this was run on the host with the VM powered OFF.

Code: Select all

amac@AlexMBP:~$ ifconfig -a
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
	options=1203<RXCSUM,TXCSUM,TXSTATUS,SW_TIMESTAMP>
	inet 127.0.0.1 netmask 0xff000000 
	inet6 ::1 prefixlen 128 
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1 
	nd6 options=201<PERFORMNUD,DAD>
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	ether 60:f8:1d:ab:35:32 
	inet6 fe80::1089:ddd2:e94a:af23%en0 prefixlen 64 secured scopeid 0x4 
	inet 10.0.0.5 netmask 0xffffff00 broadcast 10.0.0.255
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect
	status: active
p2p0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 2304
	ether 02:f8:1d:ab:35:32 
	media: autoselect
	status: inactive
awdl0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1484
	ether 42:86:84:93:b9:f6 
	inet6 fe80::4086:84ff:fe93:b9f6%awdl0 prefixlen 64 scopeid 0x6 
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect
	status: active
en1: flags=963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX> mtu 1500
	options=60<TSO4,TSO6>
	ether 72:00:07:28:57:d0 
	media: autoselect <full-duplex>
	status: inactive
en2: flags=963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX> mtu 1500
	options=60<TSO4,TSO6>
	ether 72:00:07:28:57:d1 
	media: autoselect <full-duplex>
	status: inactive
bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=63<RXCSUM,TXCSUM,TSO4,TSO6>
	ether 72:00:07:28:57:d0 
	Configuration:
		id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
		maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
		root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
		ipfilter disabled flags 0x2
	member: en1 flags=3<LEARNING,DISCOVER>
	        ifmaxaddr 0 port 7 priority 0 path cost 0
	member: en2 flags=3<LEARNING,DISCOVER>
	        ifmaxaddr 0 port 8 priority 0 path cost 0
	nd6 options=201<PERFORMNUD,DAD>
	media: <unknown type>
	status: inactive
utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000
	inet6 fe80::cb3f:8c63:db:a78%utun0 prefixlen 64 scopeid 0xa 
	nd6 options=201<PERFORMNUD,DAD>
utun1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
	inet6 fe80::955:6ae9:e998:7b33%utun1 prefixlen 64 scopeid 0xb 
	nd6 options=201<PERFORMNUD,DAD>
en4: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=10b<RXCSUM,TXCSUM,VLAN_HWTAGGING,AV>
	ether 98:5a:eb:d7:d6:18 
	inet6 fe80::10b0:db09:3bf:820a%en4 prefixlen 64 secured scopeid 0xd 
	inet 169.254.55.88 netmask 0xffff0000 broadcast 169.254.255.255
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect (1000baseT <full-duplex,flow-control,energy-efficient-ethernet>)
	status: active

I attached a screenshot of what my VirtualBox GUI interface Network settings looks like (can't figure out how to get the image to display inline with the img tags??) You might notice that my guest is built with Vagrant. Once I figure out the settings that work using the VirtualBox GUI, I plan to code these settings into my Vagrant file. For now, I have built the machine with Vagrant, but I have been interacting with it using the VIrtualBox GUI interface...

Here is ifconfig -a, run on the HOST, but with the VM guest powered ON - note now there is an en5!? Not sure where this comes from??:

Code: Select all

amac@AlexMBP:~$ ifconfig -a
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
	options=1203<RXCSUM,TXCSUM,TXSTATUS,SW_TIMESTAMP>
	inet 127.0.0.1 netmask 0xff000000 
	inet6 ::1 prefixlen 128 
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1 
	nd6 options=201<PERFORMNUD,DAD>
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	ether 60:f8:1d:ab:35:32 
	inet6 fe80::1089:ddd2:e94a:af23%en0 prefixlen 64 secured scopeid 0x4 
	inet 10.0.0.5 netmask 0xffffff00 broadcast 10.0.0.255
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect
	status: active
p2p0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 2304
	ether 02:f8:1d:ab:35:32 
	media: autoselect
	status: inactive
awdl0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1484
	ether 42:86:84:93:b9:f6 
	inet6 fe80::4086:84ff:fe93:b9f6%awdl0 prefixlen 64 scopeid 0x6 
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect
	status: active
en1: flags=963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX> mtu 1500
	options=60<TSO4,TSO6>
	ether 72:00:07:28:57:d0 
	media: autoselect <full-duplex>
	status: inactive
en2: flags=963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX> mtu 1500
	options=60<TSO4,TSO6>
	ether 72:00:07:28:57:d1 
	media: autoselect <full-duplex>
	status: inactive
bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=63<RXCSUM,TXCSUM,TSO4,TSO6>
	ether 72:00:07:28:57:d0 
	Configuration:
		id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
		maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
		root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
		ipfilter disabled flags 0x2
	member: en1 flags=3<LEARNING,DISCOVER>
	        ifmaxaddr 0 port 7 priority 0 path cost 0
	member: en2 flags=3<LEARNING,DISCOVER>
	        ifmaxaddr 0 port 8 priority 0 path cost 0
	nd6 options=201<PERFORMNUD,DAD>
	media: <unknown type>
	status: inactive
utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000
	inet6 fe80::cb3f:8c63:db:a78%utun0 prefixlen 64 scopeid 0xa 
	nd6 options=201<PERFORMNUD,DAD>
utun1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
	inet6 fe80::955:6ae9:e998:7b33%utun1 prefixlen 64 scopeid 0xb 
	nd6 options=201<PERFORMNUD,DAD>
en4: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
	options=10b<RXCSUM,TXCSUM,VLAN_HWTAGGING,AV>
	ether 98:5a:eb:d7:d6:18 
	inet6 fe80::10b0:db09:3bf:820a%en4 prefixlen 64 secured scopeid 0xd 
	inet 169.254.217.97 netmask 0xffff0000 broadcast 169.254.255.255
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect (1000baseT <full-duplex,flow-control,energy-efficient-ethernet>)
	status: active
en5: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	ether ba:53:ac:94:01:65 
	inet6 fe80::831:9fa1:ed32:593d%en5 prefixlen 64 secured scopeid 0xe 
	inet 169.254.41.170 netmask 0xffff0000 broadcast 169.254.255.255
	nd6 options=201<PERFORMNUD,DAD>
	media: autoselect (100baseTX <full-duplex>)
	status: active

And here are my /etc/network/interfaces file and ifconfig run from the GUEST, camera plugged into host:

Code: Select all

vagrant@vagrant:~$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto enp0s3
iface enp0s3 inet dhcp
pre-up sleep 2

auto enp0s8
iface enp0s8 inet static 
address 192.168.0.24
netmask 255.255.255.0
gateway 129.168.0.1


vagrant@vagrant:~$ ifconfig -a
enp0s3    Link encap:Ethernet  HWaddr 08:00:27:19:2c:a4  
          inet addr:10.0.2.15  Bcast:10.0.2.255  Mask:255.255.255.0
          inet6 addr: fe80::a00:27ff:fe19:2ca4/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:120 errors:0 dropped:0 overruns:0 frame:0
          TX packets:91 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:11397 (11.3 KB)  TX bytes:10985 (10.9 KB)

enp0s8    Link encap:Ethernet  HWaddr 98:a5:eb:d7:d6:18  
          inet addr:192.168.0.24  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::9aa5:ebff:fed7:d618/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:16 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:5472 (5.4 KB)  TX bytes:648 (648.0 B)

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:16 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1 
          RX bytes:1552 (1.5 KB)  TX bytes:1552 (1.5 KB)

And finally from within the Guest, lshw:

Code: Select all

vagrant@vagrant:~$ sudo lshw -class network
  *-network:0             
       description: Ethernet interface
       product: 82540EM Gigabit Ethernet Controller
       vendor: Intel Corporation
       physical id: 3
       bus info: pci@0000:00:03.0
       logical name: enp0s3
       version: 02
       serial: 08:00:27:19:2c:a4
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 32 bits
       clock: 66MHz
       capabilities: pm pcix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e1000 driverversion=7.3.21-k8-NAPI duplex=full ip=10.0.2.15 latency=64 link=yes mingnt=255 multicast=yes port=twisted pair speed=1Gbit/s
       resources: irq:19 memory:f0000000-f001ffff ioport:d010(size=8)
  *-network:1
       description: Ethernet interface
       product: 82540EM Gigabit Ethernet Controller
       vendor: Intel Corporation
       physical id: 8
       bus info: pci@0000:00:08.0
       logical name: enp0s8
       version: 02
       serial: 98:a5:eb:d7:d6:18
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 32 bits
       clock: 66MHz
       capabilities: pm pcix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e1000 driverversion=7.3.21-k8-NAPI duplex=full ip=192.168.0.24 latency=64 link=yes mingnt=255 multicast=yes port=twisted pair speed=1Gbit/s
       resources: irq:16 memory:f0820000-f083ffff ioport:d240(size=8)

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OSX host, Ubuntu guest, bridged ethernet device

OSX host, Ubuntu guest, bridged ethernet device

Re: OSX host, Ubuntu guest, bridged ethernet device

Re: OSX host, Ubuntu guest, bridged ethernet device