Legend for the VLAN page - specifically the U that shows beside some ports

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1

I cannot find any docs that explain the abbreviations for the Device-VLAN page. I would like to know what the ‘U’ beside some the the ports mean.

VLANs%20-%20LibreNMS
VLANs%20-%20LibreNMS717×134 9.52 KB

2

I think …

U = Untagged Vlan
nothing = Tagged Vlan

3

That makes sense. I thought that, but was confused why some ports were untagged (for Vlan 1), and tagged for other Vlans. (Still trying to wrap my brain around VLANs and tagging).

This gets me one more step down the road. Thank you.

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