Cisco Uplinks connected to F5

With both links connected, do a show interface te1/1/1 and show interface 2/1/1. Do both ports show up or a different status?

Do a "terminal monitor" if you are logged in via VTY.

Pull Te1/1/1, what does Te2/1/1 now say? Did any information regarding Te2/1/1 show during the process of the F5 flipping.

Shutdown Te2/1/1 and re-enable the port with Te1/1/1 still disconnected. Does Te2/1/1 status show up? Does this port work? If not, move Te2/1/1 cable to the port on the F5 that Te1/1/1 was plugged into, does it work now?

Move Te2/1/1 back to the original F5 port is was on, plug Te1/1/1 back in. Verify F5 port configuration on Te2/1/1 peer is properly configured.