Aug 172011
 

When you try to configure trunk port you might see following error

An interface whose trunk encapsulation is Auto can not be configured to trunk mode

To fix this you need set encapsulation to 802.1q using the following command

conf t

int gi4/10

switchport trunk encapsulation dot1q

This should fix your issue

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 Posted by at 4:15 pm

  One Response to “How to fix “An interface whose trunk encapsulation is Auto can not be configured to trunk mode” in cisco switch”

  1. thankz

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