ORACLE 11g R2: RMAN y NetBackup

If you realize the backups using Netbackup, then so that you could be execute from RMAN, in spite of having the client installed in the host where from you will proceed to execute RMAN, it is not sufficient. You need to link to library of the client Netbackup with this command

ln -sf /usr/openv/netbackup/bin/libobk.so64 $ORACLE_HOME/lib/libobk.so

This is valid for all the oracle versions. But also, specially for the version Oracle 11G, it is necessary to install a patch in Netbackup

NB_6.5.5_ET1940073_1_347227.zip

As soon as the client NetBackup was installed, linked the Oracle library and installed the NetBackup patch we can already proceed to realize backups of Oracle using  RMAN.