D-Link DES-1228 Manual page 35

5 Configuration
Figure 52 – Configuration > 802.1Q VLAN > Asymmetric VLAN - Enabling Asymmetric VLAN
2. Configure the shared VLAN (VLAN 1) and access VLANs (VLAN 2, 3, 4)
In this case, the default VLAN is used as shared VLAN, and the ports that are shared in the network
are:
Ports 15-18 are connected to the server
Port 20 is connected to the firewall
The group of shared ports needs to be included for all the VLANs. Ports 15-18, 20 already belong to
VLAN 1, therefore no changes are needed.
VLAN 2 is configured to include ports 15-18, 20 (shared VLAN ports) and the set of ports to be
separated from the other VLANs (for example, port 5). VLAN 3 and 4 are then configured to include
shared ports and the set of ports to be separated from the other VLANs (for example, port 6 and 7
respectively). Therefore we have three VLANs that share some common ports, but their original
membership ports are still separated from each other (for example, port 5, 6, and 7).
The VLAN settings of this example are:
VLAN 1: default VLAN 1, including all ports with untagged.
VLAN 2: Member ports are untagged port 5, 15-18, 20.
VLAN 3: Member ports are untagged port 6, 15-18, 20.
VLAN 4: Member ports are untagged port 7, 15-18, 20.
Figure 53 – Configuration > 802.1Q VLAN > Asymmetric VLAN – Create VLANs
3. Configuring the PVID of access VLAN
Configure the PVID setting located at the bottom of the VLAN configuration page. The user needs to
set the shared set of ports as PVID 1, and the other separated groups of ports (for example, port 5, 6,
and 7) as PVID 2, 3 and 4 respectively.
The purpose of assigning PVID is to make sure the untagged packets will be transmitted correctly.
Figure 54 – Configuration > 802.1Q VLAN > Asymmetric VLAN – Assign PVID
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