ZyXEL Communications XGS-4526 User Manual

Chapter 9 VLAN

XGS-4526/4528F/4728F User’s Guide

Protocol based VLANs allow you to group traffic into logical VLANs based on the 
protocol you specify. When an upstream frame is received on a port (configured 
for a protocol based VLAN), the Switch checks if a tag is added already and its 
protocol. The untagged packets of the same protocol are then placed in the same 
protocol based VLAN. One advantage of using protocol based VLANs is that priority 
can be assigned to traffic of the same protocol.

Note: Protocol based VLAN applies to un-tagged packets and is applicable only when 

you use IEEE 802.1Q tagged VLAN.

IP

Enter the IP address of the subnet for which you want to configure this 
subnet based VLAN.

Mask-Bits

Enter the bit number of the subnet mask. To find the bit number, convert 
the subnet mask to binary format and add all the 1’s together. Take 
“255.255.255.0” for example. 255 converts to eight 1s in binary. There are 
three 255s, so add three eights together and you get the bit number (24). 

VID

Enter the ID of a VLAN with which the untagged frames from the IP subnet 
specified in this subnet based VLAN are tagged. This must be an existing 
VLAN which you defined in the Advanced Applications > VLAN screens.

Priority

Select the priority level that the Switch assigns to frames belonging to this 
VLAN.

Add

Click Add to save your changes to the Switch’s run-time memory. The 
Switch loses these changes if it is turned off or loses power, so use the 
Save link on the top navigation panel to save your changes to the non-
volatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Index

This is the index number identifying this subnet based VLAN. Click on any 
of these numbers to edit an existing subnet based VLAN.

Active

This field shows whether the subnet based VLAN is active or not.

Name

This field shows the name the subnet based VLAN.

IP

This field shows the IP address of the subnet for this subnet based VLAN. 

Mask-Bits

This field shows the subnet mask in bit number format for this subnet 
based VLAN. 

VID

This field shows the VLAN ID of the frames which belong to this subnet 
based VLAN.

Priority

This field shows the priority which is assigned to frames belonging to this 
subnet based VLAN.

Delete

Click this to delete the subnet based VLANs which you marked for deletion. 

Cancel

Click Cancel to begin configuring this screen afresh.

Table 20   Advanced Application > VLAN > VLAN Port Setting > Subnet Based VLAN 
Setup  (continued)