We want to upgrade firmware on our cisco DS-C9513 and DS-C9509 switches.
Current firmware is 3.3(1c).
I have few questions regarding this as I have never performed an upgrade before.
1) How do I find current firmware release date?
2) The latest firmware that we can install and its release date.
3) whether Online upgrade is available?
4) Switch outage required?
Thanks in advance.