bhyve and multiple network devices

[Shawn Webb]

On Mon, May 03, 2021 at 10:46:34PM +0200, Juraj Lutter wrote:
> Hi,
> 
> my bhyve command line (on 13.0-RELEASE) is:
> 
> /usr/sbin/bhyve -c 2 -m 4G -H -A -P -u -s 0:0,hostbridge -s 1:0,lpc -s 2:0,virtio-net,tap100 -s 3:0,virtio-net,priv0 -s 4:0,virtio-blk,/dev/zvol/zroot/data/minio/host0/root -l com1,/dev/nmdm100B mr
> 
> the result is:
> 
> device emulation initialization error: File exists
> 
> It works when using original interface name (tap105 in this case).
> 
> priv0 is renamed tap:
> priv0: flags=8902<BROADCAST,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
>         options=80000<LINKSTATE>
>         ether 58:9c:fc:10:2b:0b
>         groups: tap
>         media: Ethernet autoselect
>         status: no carrier
>         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
> 
> Am I doing something inadequate, is this an expected behavior or is this a kind of a bug?

Unfortunately, bhyve doesn't support renamed tap devices. You'll need
to keep the original tapN name.

What you might want to experiment with is setting a description for
the tap device. For example:

ifconfig tapN description "private vNIC"

Thanks,

-- 
Shawn Webb
Cofounder / Security Engineer
HardenedBSD

https://git.hardenedbsd.org/hardenedbsd/pubkeys/-/raw/master/Shawn_Webb/03A4CBEBB82EA5A67D9F3853FF2E67A277F8E1FA.pub.asc
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