I have encounter issue after i migrate the backup from master 1 to master 2
c:\Program Files\Veritas\NetBackup\bin\admincmd>bptestbpcd.exe -client sample.client.com
<16>bptestbpcd main: Function ConnectToBPCD(sample.client.com) failed: 7660
<16>bptestbpcd main: The peer proxy cannot find usable certificates for the certificate protocol
The peer proxy cannot find usable certificates for the certificate protocol
Does the client have the CA certificate from the new master?
Are you 100% sure forward and reverse lookups of the client name/IP and master clustername/VIP are correct? From both ends.
The get certificate is failing with a timeout - are there any firewalls in play that may be blocking the connections.
The only port that should be required is 1556. This needs to be open bidirectionally between master and client (you indicate this is so).
Does the client require a token to get a certificate from the new master?
Have you updated the clients SERVER list to put the new master at the top (this is the default server where certificate requests are sent, otherwise use the '-server <master>' option in your nbcertcmd command.