error 21 / 25 by a RMAN Online Backup
I have a problem with some RMAN Online Backups.
In the Netbackup Activity Monitor i get some errors "socket open failed (21)" and "cannot connect on socket (25)", but i can restore the database!
What is the reason? The network between my backup servers and the Oracle clients runs...and runs....and runs.
Attached a pic from my Activity Monitor.