ZyXEL ES-3148 Guida Utente

Chapter 8 VLAN

ES-3148 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.

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Protocol based VLAN applies to un-tagged packets and is applicable only 
when you use IEEE 802.1Q tagged VLAN.

Active

Check this box to activate the IP subnet VLAN you are creating or editing.

Name

Enter up to 32 alpha numeric characters to identify this subnet based 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). 

Source Port

Enter the port to which this subnet based VLAN is bound.

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. 

Source Port

This field shows the port to which this subnet based VLAN is bound.

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 19   Advanced Application > VLAN > VLAN Port Setting > Subnet Based VLAN Setup