Secured transport on Layer 2

[Sreenath]

Hi Experts, I have a challenge where i would like some suggestions and inputs to help me design this right with security in mind.

I have two microwave connections landing on switchs with two separate cables (Gi 0/0 and Gi0/1) configured as Trunk.

I would like to ensure Secure connectivity between the two switches and not have data compromised.

Since there is going to be no IP communications (other challenges on why this cannot be Layer3) i would like some suggestions on how to make this connection secure. 

I would have used IPSec Tunnel if Layer 3. What would be other suggestions?

Two switches are 3560 with 16.x code.

[balaji.bandi]

Look at some good thread

https://community.cisco.com/t5/routing/switch-to-switch-encryption/td-p/2994678

[Rob Ingram]

Hi,
As the devices in question are switches, you cannot configure an IPSec Tunnel. So as previously indicated you can use, MACSec to encrypt the traffic. However it depends on which exact model 3560 you have and the license (not supported on LAN base).

HTH