This article describes how to troubleshoot a Symantec VIP certificate and verify that the certificate is valid using the Symantec Diagnostic Tool (SymDiag)
What is ‘Check VIP Server Connectivity’?
2. In the 'Check Symantec VIP' dialog, in the 'Server' section, leave the default public authentication server selected, or identify an alternate authentication server. In the 'Enter a VIP' section, click the ‘File…’ button to browse to and select your Symantec VIP certificate. Also, enter the password for the certificate.