Featured Functions |
yAccess Port: The port connects to a single device that is not tagged. The user must define the default port PVID that determines to which VLAN the device belongs. Once the ingress packet of this Access Port egresses to another Trunk Port (the port needs all packets to carry tag information),
yTrunk Port: The port connects to a LAN that consists of untagged devices/tagged devices and/or switches and hubs. In general, the traffic of the Trunk Port must have a Tag. Users can also assign PVID to a Trunk Port. The untagged packet on the Trunk Port will be assigned the port default PVID as its VID.
The following section illustrates how to use these ports to set up different applications.
Sample Applications of VLANs using MOXA EDS-518A
| Device A | Switch A | Switch B | Port 7 (Access Port | Device I | ||
PVID 4) |
| VLAN 4 Untagged | ||||
VLAN 5 Untagged Device |
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| Port 3 (Trunk Port, PVID 1) | Port 5 (Access Port |
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Port 1 (Access Port |
| PVID 3) |
| Device H | ||
PVID 5) |
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| VLAN 3 Untagged |
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| Port 2 (Trunk Port PVID 2, |
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| Fixed VLAN (Tagged)=3,4) |
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| Port 4 (Access |
| Port 6 (Access Port PVID 5) | ||
| HUB | Port PVID 2) |
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| Device F |
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| Device G | ||
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| VLAN 2 Untagged |
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| VLAN 5 Untagged Device | |
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| Device E |
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| VLAN 4 Tagged Device, VID 4 |
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| Device B | Device C | Device D |
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VLAN 2 Untagged | VLAN 3 Tagged Device, VID 3 |
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Device | VLAN 2 Untagged |
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In this application,
yPort 1 connects a single untagged device and assigns it to VLAN 5; it should be configured as “Access Port” with PVID 5.
yPort 2 connects a LAN with two untagged devices belonging to VLAN 2. One tagged device with VID 3 and one tagged device with VID 4. It should be configured as “Trunk Port” with PVID 2 for untagged device and Fixed VLAN (Tagged) with 3 and 4 for tagged device. Since each port can only have one unique PVID, all untagged devices on the same port can only belong to the same VLAN.
yPort 3 connects with another switch. It should be configured as “Trunk Port.” GVRP protocol will be used through the Trunk Port.
yPort 4 connects a single untagged device and assigns it to VLAN 2; it should be configured as “Access Port” with PVID 2.
yPort 5 connects a single untagged device and assigns it to VLAN 3; it should be configured as “Access Port” with PVID 3.