Subnet Based Vlans - ZyXEL Communications VES1724-56 User Manual

Chapter 10 VLAN
Table 46 Advanced Application > VLAN > VLAN Port Setting (continued)
LABEL
GVRP
Acceptable Frame
Type
VLAN Trunking
Apply
Cancel

10.6 Subnet Based VLANs

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 Services 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 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 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 configure VLAN with
priority 3 and VID of 300 for traffic received from IP subnet 10.1.1.0/24 (data services). All
138
DESCRIPTION
Select this check box to allow GVRP on this port.
Specify the type of frames allowed on a port. Choices are All and Tag 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.
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.
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.
Click Cancel to begin configuring this screen afresh.
VES1724-56 User's Guide