Tp-Link TL-SG108PE [34/48] Mtu vlan

There are 3 types of VLAN modes supported in the switch:

1. MTU VLAN

MTU VLAN (Multi-Tenant Unit VLAN) defines an uplink port which will build up several VLANs with

each of the other ports. Each VLAN contains two ports, the uplink port and one of the other ports in

the switch, so the uplink port can communicate with any other port but other ports cannot

communicate with each other.

2. Port Based VLAN

VLANs are divided based on ports. By default, the Port Based VLAN is enabled.

3. 802.1Q VLAN

The IEEE 802.1Q protocol defines a new format of the frame; it adds a Tag header in the original

Ethernet frame, as follows:

Figure 7-2 IEEE 802.1Q frame

VLAN tags in the packets are necessary for the switch to identify packets of different VLANs. The

switch works at the data link layer in OSI model and it can identify the data link layer encapsulation

of the packet only, so you can add the VLAN tag field into the data link layer encapsulation for

identification.

IEEE 802.1Q Tag VLAN is divided by VLAN ID (VID). On receiving a frame, the switch checks the

VID in the Tag header of the frame to decide which VLAN it belongs to. If the receiving frame

doesn’t contain the Tag header, the switch will assign a Tag to the frame, using the PVID of the

port as its VID.

In this User Guide, the tagged packet refers to the packet with VLAN tag whereas the untagged

packet refers to the packet without VLAN tag.

The VLAN module is mainly for VLAN configuration, including four submenus: MTU VLAN, Port

Based VLAN, 802.1Q VLAN and 802.1Q PVID Setting.

7.1 MTU VLAN

On this page you can choose to enable MTU VLAN mode and configure VLANs.