ZyXEL Communications MES3500-24 Manual Do Utilizador

Chapter 9 VLAN

MES3500-24/24F User’s Guide

Subnet based VLANs allow you to group traffic into logical VLANs based on the source IP subnet you 
specify. When a frame is received on a port, the Switch checks if a tag is added already and the IP 
subnet it came from. The untagged packets from the same IP subnet are then placed in the same 
subnet based VLAN. One advantage of using subnet based VLANs is that priority can be assigned to 
traffic from the same IP subnet.

For example, an ISP (Internet Service Provider) may divide different types of services it provides to 
customers into different IP subnets. Traffic for voice services is designated for IP subnet 
172.16.1.0/24, video for 192.168.1.0/24 and data for 10.1.1.0/24. The Switch can then be 
configured to group incoming traffic based on the source IP subnet of incoming frames.

You can then configure a subnet based VLAN with priority 6 and VID of 100 for traffic received from 
IP subnet 172.16.1.0/24 (voice services). You can also have a subnet based VLAN with priority 5 
and VID of 200 for traffic received from IP subnet 192.168.1.0/24 (video services). Lastly, you can 
configure VLAN with priority 3 and VID of 300 for traffic received from IP subnet 10.1.1.0/24 (data 

*

Settings in this row apply to all ports.

Use this row only if you want to make some settings the same for all ports. Use this row 
first to set the common settings and then make adjustments on a port-by-port basis. 

Note: Changes in this row are copied to all the ports as soon as you make them.

Ingress Check 

If this check box is selected for a port, the Switch discards incoming frames for VLANs 
that do not include this port in its member set.

Clear this check box to disable ingress filtering. 

PVID

A PVID (Port VLAN ID) is a tag that adds to incoming untagged frames received on a port 
so that the frames are forwarded to the VLAN group that the tag defines.

Enter a number between 1and 4094 as the port VLAN ID.

GVRP

Select this check box to allow GVRP on this port. 

Acceptable Frame 
Type 

Specify the type of frames allowed on a port. Choices are All, Tag Only and Untag Only.

Select All from the drop-down list box to accept all untagged or tagged frames on this 
port. This is the default setting. 

Select Tag Only to accept only tagged frames on this port. All untagged frames will be 
dropped.

Select Untag Only to accept only untagged frames on this port. All tagged frames will be 
dropped.

VLAN Trunking

Enable VLAN Trunking on ports connected to other switches or routers (but not ports 
directly connected to end users) to allow frames belonging to unknown VLAN groups to 
pass through the Switch.

Isolation

Select this to allows this port to communicate only with the CPU management port and 
the ports on which the isolation feature is not enabled.

Apply

Click Apply 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.

Advanced Application > VLAN > VLAN Port Setting  (continued)