vnic VID property is misteriously zeroed on Solaris 11.1 after VM start

[sscdvp]

I use VB 4.2.8

On Solaris 11.1 SRU1.4 VID property for vnic interface is zeroed after VM start. ORACLE VB uses that vnic interface. vnic created on the base of dot1Q trunk. The same problem was observed for vlan interfaces too.

How to reproduce:

1. dladm create-vnic -l net0 -v 998 v4vid998link0
2. dladm show-vnic

   LINK OVER SPEED MACADDRESS MACADDRTYPE VID
   upv4vid201link0 net0 100 2:8:20:5b:23:4c random 201
   upv4vid9link0 net0 100 2:8:20:a1:96:5f random 9
   upv4vid944link0 net0 100 2:8:20:85:4b:6 random 944
   v4vid998link0 net0 100 8:0:27:d1:fe:fe random 998
   

3. Create VM in ORACLE Virtualbox.
4. Add network "bridged adapter" v4vid998link0
5. Start VM
6. dladm show-vnic

   LINK OVER SPEED MACADDRESS MACADDRTYPE VID
   upv4vid201link0 net0 100 2:8:20:5b:23:4c random 201
   upv4vid9link0 net0 100 2:8:20:a1:96:5f random 9
   upv4vid944link0 net0 100 2:8:20:85:4b:6 random 944
   v4vid998link0 net0 100 8:0:27:d1:fe:fe fixed 0
   

7. No IP conectivity in VM.

Workaround:

After VM start restore VID setting: dladm modify-vnic -v 998 v4vid998link0 That helps to restore IP connectivity for that VM.

NOTE 1: the issue appears for the first time after VM started. VM reboot process doesn't affect IP connectivity. Only VM poweroff makes the issue to appear again. NOTE 2: vlan interfaces are affected by the issue too. NOTE 3: Seen the problem in 4.1.x and 4.2.x builds.

[Ramshankar Venkataraman]

I tried reproducing this issue a few weeks back and I wasn't able to. The VID property of the VNIC was intact after starting the VM. Could you please provide the output of:

pkg info kernel
cat /var/adm/messages | grep vbox
modinfo | grep vbox