I have a cisco Sf250 Switch, all are working fine except one port. I have made it to work as a access port but it keeps changing to Trunk port over time. I have switched ports but to no avail.

Any help is appreciated,

Thanks in advanced.

  • 1
    Do you have any macros assigned to that int? I have SG300s and I think no macro auto smartport kept it from doing that. If there's a phone hooked up to the int it may go into trunk mode automatically. My experience with the SG300 is little, and null for yours.
    – user208145
    Sep 6, 2018 at 8:26
  • Can you include the configuration in your question?
    – Ron Trunk
    Sep 6, 2018 at 20:01

2 Answers 2


Also try switchport nonegotiate


You can use the "no" form of the command to remove the trunk configuation. You need to configure "switchport mode access" to change it from trunk to access mode.

  • interface fa0/1

  • switchport mode access

  • no switchport trunk encapsulation -

  • dot1q

Hope this helps.

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