access port - tagged or untagged?

Question

I want to set one port on my switch to vlan 20.  In doing so I am hoping the port will acquire an ip address from my vlan 20 dhcp scope.  It works fine on a cisco switch port as an access port.My understanding is I need to set the port to untagged on vlan 20 but I get an error that the port in a dual-mode port.  What do I need to do to make this port get only vlan 20?  thanks.

david_chavarri1 · Answer

I am glad I was able to help.

Pura Vida

unknown · Answer

I got it to work with your help of course!  I did a sho vlan brief e 3/1/1 and it showed that it was still in the voice vlan 200.  Once I removed it from 200 and remove the dual-mode, I was able to "untagged" the port in vlan 20.  Thanks for your help.

david_chavarri1 · Answer

Hi Dave,

That means that the Port 3/1/1 Is Tagged in a VLAN. You cant untag a Port un More than one VLAN so first you need to remove the Port from the VLAN.

With a show VLAN, you can check which porta are assigned to which vlans, Tagged or untagged.

Go to that VLAN and do "no tag eth 3/1/1" after it is removed.  You can add it as untagged un the required VLAN.