Hi ,   First thing if you are going to take the redundant internet link from the same ISP then you can go in the way Pawan has mention and can use local preference for the outgoing traffic and AS prepend for the incoming traffic from the internet and...

Do you have any other platform to configure your Lab ? , because it should work ideally and configuration is fine. However to complete your Lab you already have the workaround.. I'm suspecting this issue is something related to the hardware you are u...

now you can try to add the sticky keyword with you port security configuration and delete the static mac entry and then give it a shot . Please rate the helpful comment.

Hi Nelson, Remove "spanning-tree portfast" from the config and then check We use "spanning-tree portfast" on access ports and not on trunks

Try to add the mac of your machine as static on the interface and then check switch port-security mac-address < System Mac>