About a decacde ago, I was unfairly placed on a PIP because of a grossly incompetent manager (who was ALSO placed on a PIP). I decided to prove that it was unfairly and beat it. (Which I did.) I assumed that was the end of things.
However, the reality was I hurt myself. My raises were lower, even when evaluated as exceeding in later years. Promotions were slow and grants were definitely below what others on my team got.
After Chambers it also seemed like HR specifically started targeting successful post-PIP employees - no matter how long it had been. I assume it was so we didn't have a leg to stand on if we wanted to fight.
So, fight or don't - prove you didn't deserve this, or don't... But either way, your time enjoying working at Cisco is done. Do yourself a favor, find a place that respects you and rewards your effort. (I wish this was advice I had taken, be smarter that I was.)
Some good advice, if you ask me. Thanks for this post @X5dfXEQ-1kxj