It is this simple: you waive your rights to your separations package if you decide to lawyer up. You are armed with a slingshot, and you are running uphill towards the Cisco castle -- alone. Its lawyers man the towers, the gates, and the keep. Until hundreds of your countryman decide to find one or more mercenaries (er lawyers) whose expertise is anti-age discrimination siege tactics, you won't make it out of the tree-line. Cisco has a legal army with years of training and funding. They will bog you down in court, and deplete your time, energy and funds.
Make the smart move, take the package, waive your right to petition. Live to fight another day. You can win in another company which will appreciate your contributions and reward you accordingly. And who knows, you may find yourself in a decision-making role, where vendors like Cisco won't be able to even compete. #Slay the Cisco Dragon!