Chapter 9 VLAN

Table 19 Advanced Application > VLAN > VLAN Port Setting > Subnet Based VLAN Setup (continued)

LABEL

DESCRIPTION

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.

 

 

9.8 Protocol Based VLANs

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.

For example, port 1, 2, 3 and 4 belong to static VLAN 100, and port 4, 5, 6, 7 belong to static VLAN 120. You configure a protocol based VLAN A with priority 3

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ZyXEL Communications metrogigabit switch manual Protocol Based VLANs, 129
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