Ops Manager 1.11.x, 1.12.0
If you are running any version of Ops Manager 1.11.x or 1.12.0, you will see the following error when trying to Apply Changes
Due to hardening that was performed on the Ops Manager VM, access to the `
ping` command by the Ops Manager UI is no longer allowed. This causes the ICMP check to always fail on Ops Manager. This failure happens regardless of the network and it's support for ICMP.
The workaround is to go to Ops Manager Director / Settings / Create Network / Verification Settings and disable Enable ICMP checks by unchecking the box.
Pivotal has a story to investigate further and fix this issue in a future release.