Wednesday, December 4, 2019

Benefits of a port being tagged for one VLAN and untagged for another?

We have Dell switches that are used per equipment rack. It connects back to a central switch, and ultimately to the router.

I have a Dell Poweredge server I was looking at configs on today. The port that connects from the rack switch to the server is tagged for VLAN 73 (development) and untagged for VLAN 109 (production). The PVID is set to 109.

Correct me if I'm wrong but the port is effectively on VLAN 73, as in traffic exiting the server is on VLAN 73? And to my understanding the PVID indicates that untagged traffic that arrives on this port is tagged with VLAN 109?

I'm trying to determine what purpose is served by having VLAN 109 untagged?



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