For those considering an upgrade to 12.5, beware that there are undocumented known issues with it breaking the connectnow functionality in environments that use CDP. Network links that display network utilization and utilize CDP may stop displaying utilization and mark the network links as unavailable. All of my network maps are a mess of red dashed lines and are pretty much useless at this point. Support has acknowledged this as a known issue that is not documented, it is being tracked internally, and there will be no hotfix issued to resolve it. However, it should be resolved in the 2019.4 release. So if you upgrade and you can no longer view network utilization, basically you're out of luck until whenever 2019.4 is released.