Hello.

I'm a long time, but occasional VirtualBox user.
VBox has always worked fine for me, but now it's "featuring" a problem I never experienced before. It's possible I upgraded it, upgraded base OS, changed hardware in the meantime... as I said my use is saltuary, so I really can't remember.



In any case, VMs with bridged network start fine and work properly.
However, when I shutdown/kill/stop/pause/snapshot/etc... a VM, the network hangs as a whole (even for the host).
I have to:
# ifconfig re0 down
# ifconfig re0 up
# dhclient re0
in order to make it start again (before restarting any deamon that might have died meanwhile).

I tried seeing if this is a known issue, but could fine nothing.



System info:
# uname -a
FreeBSD alamar.ventu 12.3-RELEASE-p5 FreeBSD 12.3-RELEASE-p5 
releng/netfence_12.3-n234228-549efbbd2f6 AVEL  amd64
# pkg info | grep -iE "^(virtual|realtek)"
realtek-re-kmod-196.04         Kernel driver for Realtek PCIe Ethernet 
Controllers
virtualbox-ose-6.1.36          General-purpose full virtualizer for x86 hardware
virtualbox-ose-kmod-6.1.36     VirtualBox kernel module for FreeBSD
# ifconfig re0
re0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 
1500
        options=2018<VLAN_MTU,VLAN_HWTAGGING,WOL_MAGIC>
        ether d4:3d:7e:b4:74:15
        inet 10.1.2.18 netmask 0xffffff00 broadcast 10.1.2.255
        media: Ethernet autoselect (1000baseT <full-duplex>)
        status: active
 # kldstat
Id Refs Address                Size Name
 1   68 0xffffffff80200000   f256c8 kernel
 2    1 0xffffffff81127000     8300 cuse.ko
 3    1 0xffffffff81130000   11d288 if_re.ko
 4    1 0xffffffff8124e000   43e7d8 zfs.ko
 5    2 0xffffffff8168d000     a060 opensolaris.ko
 6    1 0xffffffff81921000    14090 geom_eli.ko
 7    1 0xffffffff81936000     8568 linprocfs.ko
 8    1 0xffffffff8193f000    112c0 linux_common.ko
 9    1 0xffffffff81951000     2990 fdescfs.ko
10    3 0xffffffff81954000    56800 vboxdrv.ko
11    2 0xffffffff819ab000     2b10 vboxnetflt.ko
12    2 0xffffffff819ae000     d9c8 netgraph.ko
13    1 0xffffffff819bc000     2628 ng_ether.ko
14    1 0xffffffff819bf000     3e90 vboxnetadp.ko
15    1 0xffffffff819c3000   12c00c i915kms.ko
16    1 0xffffffff81af0000    75f10 drm.ko
17    3 0xffffffff81b66000    13f30 linuxkpi_gplv2.ko
18    2 0xffffffff81b7a000      6d0 debugfs.ko
19    1 0xffffffff81b7b000     2bd0 acpi_wmi.ko
20    1 0xffffffff81b7e000     25a0 wmt.ko
21    1 0xffffffff81b81000     8c50 evdev.ko
22    1 0xffffffff81b8a000      b27 mac_ntpd.ko

Packages are build in Poudriere from quarterly branch.


The only message in the logs, when this happens is:
kernel: re0: promiscuous mode disabled



Any hint here?

 bye & Thanks
        av.

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