Hi,
if enabled, set Port-based VLAN ("L2 Features > VLAN > Port-based VLAN") to disabled.
If enabled, set Asymmetric VLAN (L2 Features > VLAN > Asymmetric VLAN) to disabled.
VLAN 1 already exists by default. Use "L2 Features > VLAN > 802.1Q VLAN" to create/add VLAN 22.
Within "L2 Features > VLAN > VLAN Interface" (Edit):
Port 1 - firewall (Comment):
----------------------------
VLAN Mode: Trunk
Acceptable Frame: Tagged Only
Ingress Checking: Enabled
Action: Tagged
Allowed VLAN Range: 1,22
Port 15 - DAP:
--------------
VLAN Mode: Trunk
Acceptable Frame: Tagged Only
Ingress Checking: Enabled
Action: Tagged
Allowed VLAN Range: 1,22
Port 4 - PC:
------------
VLAN Mode: Access
Acceptable Frame: Untagged Only
Ingress Checking: Enabled
VID(1-4094): 1
Comment:
Make sure that you configure the connected firewall port to use two sub-interfaces which send and receive ethernet frames tagged with VID 1 and 22 respectively.
PT