They value people and it's an overall good place to work
Pros
Good salaries and bonuses, good environment to work, managers will let you be independent and create new projects to help out the team, which sometimes results in a good innovation spread among the whole business unit or maybe even the company. Good resources to learn about the technologies employed there and they always have people to lend a helping hand and events to share knowledge about what's happening inside the walls of Cisco and around the Networking world.
Cons
Slow innovation cycle due to the huge nature of the company which means that sometimes you can't change work processes or culture already in place. Too much corporate culture and seems like independent business units are always competing too much and not in a good way. Small teams could be smaller sometimes and get more ownership of components to feel they are changing things from the inside in a way that creates more impact.