...then just leave! But it's not that simple. I've a wife and kids and a mortgage to consider.
That WHY you should just leave! It's easier to find a job WHEN YOU HAVE A JOB. Leave on your terms and on your schedule. There's no guarantee that the package will carry you over until you find a replacement job.
Things to consider:
1) You'll be facing higher competition for what ever local jobs there are immediately after an LR than if you look for a job between the LR's. All those other guys who got LR'd want that job too. Are you really better than them? Even if you are, do you look better on paper?
2) You carry the stigma of being considered unnecessary when prospective employers look at you. Were you an underperforming worker? Were you difficult to work with your peers? Did your management not respect your work/skills/performance?
3) Will there be jobs available when the LR occurs?
4) Can you land one of those jobs before your severance package runs out? Remember, Cisco will withhold a crap load of taxes out of all lump sum payments, so you'll only see about 50-60% of the money they say they're giving you. Hopefully you'll see the bulk of the withheld taxes back early next year when you file your taxes.
5) If you can't switch to your spouse's employer's insurance, COBRA is expensive!
Save up your PTO, find a job you like on your terms, and give your notice so that you end at Cisco just before starting at the new job. No break in pay, no large sums of money held by Uncle Sam, get a smaller lump sum payment for your unused PTO, and best of all, it leave Cisco to have to scramble to find a replacement worker instead of you scrambling to find a job.
I've been blindsided by several lay-offs when a company suddenly decided to close a business unit or sell it off, or worse, let a small group of people go early so they could get under the WARN requirements for closing an office 6 months later and, of course, caught by Cisco. In almost every case, the job I took immediately after a lay-off was not a great job but it paid the bills. I'd get dissatisfied and then start looking for better opportunities and find a great job where I'd be for 3-5 years until the next blindside.
Good luck with whatever you decide to do.