[Solved] Two physical NICs bridged to Guest

Discussions related to using VirtualBox on Windows hosts.
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LinkwitzRiley
Posts: 2
Joined: 15. Sep 2021, 08:43

[Solved] Two physical NICs bridged to Guest

Post by LinkwitzRiley »

Hi all!

My problem is:

- VirtualBox 6.1 running a Debian VM
- Host PC has two ethernet cards, one in a LAN (internet and stuff) one in a separate network
- Debian VM shall use BOTH ethernet cards
- VirtualBox GUI only offers one of the ethernet cards to be connected via network bridge, i.e., I can only connect both (all) adapters to the same physical interface, instead of connecting Adapter 1 to NIC#1 and Adapter 2 to NIC#2.

The article ' virtualbox-network-setting-guide ' on nakivo dot com (can't post URLs yet) for example suggests under 'Bridged Adapter' that under the 'Name' drop down menu, all physical interfaces available to the host system should be listed, which is not the case for me.

Any suggestions?
BillG
Volunteer
Posts: 5100
Joined: 19. Sep 2009, 04:44
Primary OS: MS Windows 10
VBox Version: PUEL
Guest OSses: Windows 10,7 and earlier
Location: Sydney, Australia

Re: Two physical NICs bridged to Guest

Post by BillG »

The guide is quite correct. If the host has two active network connections, both should appear as options in the dropdown list. That certainly has always happened on my PCs.

Is there anything unusual about the host NICs? Are they both connected to a working physical network?
Bill
mpack
Site Moderator
Posts: 39156
Joined: 4. Sep 2008, 17:09
Primary OS: MS Windows 10
VBox Version: PUEL
Guest OSses: Mostly XP

Re: Two physical NICs bridged to Guest

Post by mpack »

The VirtualBox NDISx Bridging Drivers need to be enabled in the networking stack for the host NIC. If it is then the NIC will be visible to the VirtualBox bridging feature.
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LinkwitzRiley
Posts: 2
Joined: 15. Sep 2021, 08:43

Re: Two physical NICs bridged to Guest

Post by LinkwitzRiley »

Thanks! That was it.

I activated the Bridged Networking Driver and now everythings works fine!

(I am pretty sure I deactivated the driver myself, though *facepalm*)

Thanks guys!
mpack
Site Moderator
Posts: 39156
Joined: 4. Sep 2008, 17:09
Primary OS: MS Windows 10
VBox Version: PUEL
Guest OSses: Mostly XP

Re: Two physical NICs bridged to Guest

Post by mpack »

Thanks for reporting back.
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