Hello everybody,

I currently have a problem and I think I have found the cause.
I have a stack of 2 switch cores which are connected via ports TE1 and TE2.
(The TE1 of switch1 goes to the TE1 of switch 2 and the TE2 of switch 1 goes to the TE2 of switch 2)

Here is the switch configuration, in VLAN 1 (default Vlan)

Here is the switch configuration, in VLAN 2 

 

 

Ports Te1 and Te2 are in Forbidden  and I can't switch it to Trunk... 

I don't have a LAG configured

 

Can someone help me stop pulling my hair out?