Date: Sat, 30 Dec 2017 01:10:53 -0500 From: Shawn Webb <shawn.webb@hardenedbsd.org> To: freebsd-virtualization@freebsd.org Subject: Unable to use renamed tap device Message-ID: <20171230061053.ui4wc4yqw7szsbuw@mutt-hbsd>
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Hey All,
I'm in the process of reorganizing my bhyve setup on my development
laptop. I'd like to have rename the tap devices to match the name of
the VM so that it's easier to keep track of. Otherwise, I have to keep
a spreadsheet of (tap3 -> win10-vm, tap4 -> fbsd-vm).
It appears bhyve doesn't attach renamed tap devices. Here's the steps
I used:
ifconfig bridge0 create
ifconfig tap0 create name fbsd-01
ifconfig bridge0 addm em0 addm fbsd-01 up
sh /usr/share/examples/bhyve/vmrun.sh -t fbsd-01 [normal vmrun.sh arguments=
here]
(In this example, em0 is the physical network device connected to the
LAN. I want to share em0 with the host and the guest via the bridge.)
The net.link.tap.up_on_open sysctl node is set to 1. Normally, when
bhyve starts up (with tap0 instead of fbsd-01), it opens the tap
device and UPs it. I'm not seeing that same behavior with a renamed
tap interface:
$ ifconfig ld-03_01
ld-03_01: flags=3D8903<UP,BROADCAST,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu=
1500
options=3D80000<LINKSTATE>
ether 00:bd:df:e9:f6:04
groups: tap
media: Ethernet autoselect
status: no carrier
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
So, it seems to me that bhyve doesn't like it when tap devices are
renamed. Can anyone shed some light on this?
Thanks,
--=20
Shawn Webb
Cofounder and Security Engineer
HardenedBSD
Tor-ified Signal: +1 443-546-8752
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