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4.3.5.8.1.1 Example of VLAN Configuration
Example : To create a Port VLAN group with a VID of 1 and containing Ports 13, the
VLAN must not only be defined, but Ports 13 in should also have their default tags set
to 1. When using Port VLAN, the switch should also perform tag filtering or removal on
all ports (Figure 14). In this way, applied tags will not reach VLAN unaware devices.
A special type of Port VLAN is the overlapping Port VLAN where one port is shared
among multiple VLANs.
Example : Three computers on Ports 13 need to share a printer on Port 4, but the
communication among these computers needs to be blocked. One way to accomplish
this is to create four VLAN groups in the Configure 802.1Q VLAN Group and VID
menu (Figure 13) as follows :
Group 1 : VID = 1, members 1 & 4
Group 2 : VID = 2, members 2 & 4
Group 3 : VID = 3, members 3 & 4
Group 4 : VID = 4, members 1, 2, 3 & 4
Then in the Configure 802.1Q VLAN Tag menu (Figure 14), the “Egress Tag Filter
would be enabled for ports 14 and the following VIDs would be defined :
Port 1 : 1
Port 2 : 2
Port 3 : 3
Port 4 : 4
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