I am going to be upgrading vcenter from 5.1 to 5.5. I have some clusters that use nexus 1000v. Are there any precautions I need to take for the nexus 1000v?
Please check if Cisco VSM and VEM are compatible with 5.5
Cisco N1K Compatibility Guide - Nexus 1000V and ESX Upgrade Utility
Cisco N1k Release Notes information - Cisco Nexus 1000V Switch for VMware vSphere - Compatibility Information - Cisco