I was LR'd at 18 year mark.
I disagree that the company was a horrible place to work. It was a great place. It was also however like a warm blanket for a long nap. Do NOT get complacent.
You may think you are super well positioned and a high-value employee - DO NOT count on it. Two quarters earlier from my LR, I received a big award. Two quarters later - OUT. I don't regret the time I spent at Cisco at all, but DO NOT underestimate that you can easily be OUT, just a few short months after even your best performance. I was amazed at the opportunities and awesome jobs out there. DO NOT get too comfortable - COMPLACENCY will cost you in the long run.
If you do remain up to speed and relevant, everything will be OK. If you spend your time NOT pushing yourself, you will pay for it later. USE your time for YOUR advantage. PUSH YOURSELF ALWAYS.