KB ID0001167
Problem
If you try and change a ports status, to make it a trunk port, you may see this error;
Petes-Switch(config-if)#switchport mode trunk
Command rejected: An interface whose trunk encapsulation is "Auto" can not be configured to "trunk" mode.
Trunk Settings
I don’t know if this is a throwback to when we had ISL trunking and 802.1q, but you need to specify the encapsulation before you can specify a trunk.
Petes-Switch(config-if)#switchport mode trunk Command rejected: An interface whose trunk encapsulation is "Auto" can not be configured to "trunk" mode. Petes-Switch(config-if)#switchport trunk encapsulation dot1q Petes-Switch(config-if)#switchport mode trunk Petes-Switch(config-if)#
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20/06/2020
gracias
01/09/2020
thanks
16/09/2020
muchas gracias
02/11/2020
Thank you !!
17/11/2020
Thank you so much. You saved me a lot of stress.
17/12/2020
Thanks A LOT
01/02/2021
Sagol kardes
01/02/2021
Rica ederim.
01/03/2021
thanks
23/04/2021
thankz
04/05/2021
Muito Obrigado!
21/05/2021
thanks a lot
27/05/2021
Tackar
21/08/2021
Muchas gracias, fue de gran ayuda.
02/09/2021
Thank you!
28/12/2021
Muchas gracias!!
18/01/2022
tq from Indonesia
23/02/2022
merci
14/07/2022
gracias
04/09/2022
Thanks
24/09/2022
muchas gracias bro
15/02/2023
Thanks I had forgotten.
04/04/2023
Thank you – I can’t believe I forgot this!
It is indeed an old ISL throughback!