Native VLANs

Have a quick (and hopefully simple) question.

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If I have a port with vlans 10,20,30. Native vlan set for vlan 10. Can I send tagged packets with vlan 10 along with untagged or is the going to discard the vlan10 tagged packets?

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I know what how native vlans work; I am just trying to figure out if a vlan is only tag or untagged, or whether native vlan allows for both tag and untag of that specific vlan.

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Thanks