value is 0 which means to match the value of the link monitor
interval.
+prio
+ Slave priority. A higher number means higher priority.
+ The primary slave has the highest priority. This option also
+ follows the primary_reselect rules.
+
+ This option could only be configured via netlink, and is only valid
+ for active-backup(1), balance-tlb (5) and balance-alb (6) mode.
+ The valid value range is a signed 32 bit integer.
+
+ The default value is 0.
+
primary
A string (eth0, eth2, etc) specifying which slave is the