Chapter 9 VLAN
GS2220 Series User’s Guide
143
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 untagged incoming
frames will be classified based on their source IP subnet and prioritized accordingly. That is video
services receive the highest priority and data the lowest.
Fig ure 116 Subnet Based VLAN Application Example
9.7.1 C o nfig uring Subne t Ba se d VLAN
Click the Subne t Ba se d VLAN Se tup link in the VLAN Config ura tio n screen to display the configuration
screen as shown.
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