Cluster configured with two sites, you want to set up VIP for the sites. When you set up the cluster without the VIP the issue doesn't occur but when you configure VIP I get the following error:
Error: 406: PAM-CMN-5083: Unable to turn on the cluster because one or more cluster members failed cluster start checks. PAM-CMN-5146: Cluster member x.x.x.x,<PAM server> is unable to connect to the primary using address .
PAM 4.2.3
This is caused by the FQDN for the primary site VIP that's not resolvable. They have "xxx.xxx.yyy" for the primary site and "xxx.xxx.zzz" for the secondary site.
To check resolution name : Use the Tools page to see if these FQDNs can be resolved on both cluster nodes.
Another way would be to add hosts entries using the Configuration > Network > Host File Entry page. This can resolve the problem, but obviously you need to add DNS entries if missing (or maybe they need to add a DNS server on the Network > Network Settings page).