Difference between a trunk port and an untagged port
Solved
kamal
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valouvalouvalou -
valouvalouvalou -
Hello,
I would like to know the difference between a switch port configured in trunk mode and a port in untagged mode, knowing that both allow communication with all VLANs of the switch.
I would like to know the difference between a switch port configured in trunk mode and a port in untagged mode, knowing that both allow communication with all VLANs of the switch.
1 answer
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When defining the ports associated with each VLAN, there are 3 modes: Untagged, Tagged, and No:
Untagged: The port is associated with only one VLAN. This means that any equipment connected to this port will be part of the VLAN.
Tagged: Means that the frames arriving and leaving the port are marked with an additional 802.1q header in the Ethernet field.
A port can be "tagged" on multiple different VLANs.
The advantage of Tagged mode is the ability to have a server that can communicate with all the stations of the VLANs without the VLANs being able to communicate with each other.
No: No configuration in the VLAN.
Trunk mode allows you to "carry" your VLANs over the network.
Just like VRFs (layer 3).