Cisco 2960X - Automatic Shutdown port

[Translator]

Hello.

I have two 2960X switches in stack mode. I want to create an aggregation of two ports to two non-managable (external) switches and not Cisco. By default, by connecting both ports at the same time, the spanning-tree of the remote switches blocks both ports in the stack.
I would like to block one of the two ports as long as a port is in "up" status. If it changes to "down", I would like the second port to "up" and the other to "down". And so on.
Here is a diagram for clarity.

I was thinking of creating a Port-Channel for the link between the two ports.

Thank you.

Switch Ports Model SW Version SW Image
— — — — — — —
1 28 WS-C2960X-24PD-L 15.2(2)E6 C2960X-UNIVERSALK9-M
2 28 WS-C2960X-24PD-L 15.2(2)E6 C2960X-UNIVERSALK9-M

[Leo Laohoo]

Not going to work if the unmanaged switches do not support Etherchannel.

[Translator]

Thank you. Because switches are not managed directly by my organization, I cannot change their configurations. This is in fact an interconnection for access to external resources on which I wish to have redundancy. Is there any other way in this case, other than the Port Channel to manage this type of redundancy on the Cisco switches side?

[Translator]

The question is why remote switches in spannon tree block both ports is not normal.

You should take a snapshot of the BPU frames circulating on these links.

Check the spanning tree settings and if there is no protection mechanism on the switch ports of the other entity's stack.