Monday, May 25, 2020

VLAN tagging

This post will probably be deleted for being too simple, but I have been trying to wrap my head around it all weekend. 

I have to set up a Cisco switch with 3 VLAN'S using 802.1q. 

Say VLAN 20 with ports 4-10 tagged on port 1, VLAN 30 with ports 11-19 tagged on port 2, and VLAN 40 with ports 20-28 also tagged on port 2.

Ports 1-3 will be left as default VLAN 1.

My confusion is in connecting to the router. 

Since I have two tagged ports does each one need it's own connection?

Or do I just connect via the default VLAN and the tagging takes care of it?

If I just had to set up three VLAN'S and tag all to the same port I wouldn't be confused. 

What's confusing me is two different tagged ports. 

Thank you,



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