Very horizontal. Often socialise with the higher-ups either over video conferencing or locally. Drinks typically involved.
Cisco has a very positive work culture and a don't say no attitude. All employees are very helpful and will always direct your questions to the right places if they don't know the answer. When you're in the grad program you will work with peers of the same age range and generally have a great working rapport as well as after work drinks etc. on Friday night.