Contemporary Control Systems Compact Managed Switches Software Manual for Web Browser - Manual (Page 29)

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4.4.4.12 Port VLAN Security Example
Suppose that 3 computers on ports 1, 2 and 3 must talk to a printer on port 4, but not
with each other — and none of these devices is VLAN-aware. One way to accomplish
this is to define 4 VLANs, assign each included port the option “MF” (enabling its Tag
Filter) and match the Default Tags to the VIDs as follows :
Group VID Member Ports Default Tags
1 1 1 & 4 Port 1 = 1
2 2 2 & 4 Port 2 = 2
3 3 3 & 4 Port 3 = 3
4 4 1, 2, 3 & 4 Port 4 = 4
Ports 1, 2 and 3 do not talk to each other because each port uses a different tag.
However, each port’s tag is shared with port 4. The printer on port 4 can still talk to
ports 1, 2 and 3 using its own tag (4).