Native VLAN
802.1Q has a feature called the native VLAN.
The native VLAN is VLAN 1 by default on all trunk ports, however this can be manually configured on each trunk port.
The switch does not add an 802.1Q tag to frames in the native VLAN.
When a switch receives an untagged frame on a trunk port, it assumed the frame belongs to the native VLAN.
It's very important that the native VLAN matches!
Last updated