Which is the best recommendation to ensure a short downtime for the users during upgrading the access layer switches?

An administrator of a company has concerns about upgrading the access layer switches. The users rely heavily on wireless and VoIP telephony.

Which is the best recommendation to ensure a short downtime for the users during upgrading the access layer switches?
A . Install the in-service software upgrade (ISSU) feature with clustering enabled
B. Install AOS-CX 6300 or 6400 switches with always-on POE
C. Implement VSF on the AOS-CX access switches
D. Implement VSX on the AOS-CX access switches

View Answer

Answer: B

Explanation:

The key is to reduce the impact. VSF or not will have same impact when the switch reboots. But if the switch support always on poe then at least the POE clients will be ready before the switch finish booting up. If you dont have always on POE, then the poe clients will reboot AFTER the switch boots up.