802.1Q Vlan Tags - D-Link DES-3326 User Manual

Des-3326 24-port fast ethernet plus 2-port gigabit module layer 3 switch

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DES-3326 Layer 3 Fast Ethernet Switch User's Guide

Figure 5-7. IEEE 802.1Q Packet Forwarding

802.1Q VLAN Tags

The figure below shows the 802.1Q VLAN tag. There are four

additional octets inserted after the source MAC address. Their

presence is indicated by a value of 0x8100 in the EtherType field.

When a packet's EtherType field is equal to 0x8100, the packet

Switch Management and Operating Concepts