Perform pvc source redirect manually or based on
cross-net updates:
'redirecttoprimary(2)' will force to switch to primary;
'redirecttobackup(3)' will force to switch to backup;
'switchondemand(4)' will switch based on cross-net
status of the primary to and from primary;
'swondemandtoprimary(5)' will switch to primary from
backup iff cross-net of primary became active;
'swondemandtobackup(6)' will switch to backup from
primary iff cross-net of primary became inactive.