Config access mode and trunk mode at the same port

[bennylam]

I would like to know, if I didn't know the end device type, how can I configure the switch port to ensure the port traffic is good?

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switchport mode trunk? switchport trunk native vlan?

switchport nonegotiate?

I am just a junior engineer and finding some answer in the internet forum. Thanks for group discussion.

[Seb Rupik]

Hi there,

Providing the switchport is not in mode access, the switchport will send DTP frames. By configuring switchport nonegotiate the switchport will not reply to received DTP frames.

switchport mode dynamic desirable will form a trunk if the other side it set to trunk, desirable or auto.

switchport mode dynamic auto will form a trunk if the other side is set to trunk or desirable

...in all cases where DTP fails to negotiate the switchport will default to mode access.

cheers,

Seb.