In my current network environment, I have 1 Catalyst 6509 as my core device. I have a secondary Sup 720 Module that I'm installing so that I can configure NSF with SSO for my network. Is it best to schedule downtime for my Core Switch or can I hot install my secondary Sup Module.
The supervisor modules are hot-swappable.
However, if you hot insert a second supervisor engine, the second module will communicate with the active supervisor engine after completing its initial module-level diagnostics. Because the active supervisor engine is already switching traffic on the backplane, no switching-bus diagnostics are run for the second supervisor engine because running diagnostics can disrupt the normal traffic. The second supervisor engine immediately enters standby mode. The active supervisor engine downloads the software image and configuration to the standby supervisor engine, if necessary.