[TL-SG2424P] PVID Changing automatically
Hello,
I've got a problem with a TL-SG2424P (HW : TL-SG2424P 1.0 , FW : 1.0.7 Build 20141219 Rel.33340(s) ).
We have 2 Vlans.
VLAN 1 (data) : untagged for all ports
VLAN 2 (voice) : tagged for all ports
PVID for all ports : 1
1 port won't keep the PVID 1.
When I set it, it says it has been changed.
A few seconds later, when I refresh the page, the PVID has automatically changed to 2.
On the screenshot, it's port 20.
I don't understand what's going on.
The same thing has already happened with another port (I can't remember which one), but then I was able to set it back to PVID 1.
What can be the problem ?
Thanks for the help