Only a button clicks away through IM or video conferencing. Provide their feedback as to career progression.
Each manager is individual and your interactions unique. Each manager at Cisco has an anonymous survey completed by employees each quarter at a minimum and this becomes a basis for their reviews as a manager. Quarterly recognition at a theatre basis is completed and Cisco encourages formal mentors when you're on the grad program (an ex-grad) as well as after the program for you to have a business mentor.
Very good transparency from our leadership team. From regular catch-ups with your direct manager, to quarterly meetings with senior leadership team. Great reward and recognition program - good work does not go unnoticed :-)