Protocol Based Vlans; Configuring Protocol Based Vlan; Figure 38 Protocol Based Vlan Application Example - ZyXEL Communications ZyXEL Dimension ES-3148 User Manual

8.6 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 for ARP traffic received
on port 1, 2 and 3. You also have a protocol based VLAN B with priority 2 for Apple Talk
traffic received on port 6 and 7. All upstream ARP traffic from port 1, 2 and 3 will be grouped
together, and all upstream Apple Talk traffic from port 6 and 7 will be in another group and
have higher priority than ARP traffic, when they go through the uplink port to a backbone
switch C.

Figure 38 Protocol Based VLAN Application Example

8.7 Configuring Protocol Based VLAN

Click Advanced Application, VLAN Port Setting, Protocol Based VLAN in the navigation
panel to display the configuration screen as shown.
Note: Protocol-based VLAN applies to un-tagged packets and is applicable only
when you use IEEE 802.1Q tagged VLAN.
Chapter 8 VLAN
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