This object specifies the priority to be used for the
virtual router master election process. Higher values
imply higher priority.
A priority of '0', although not settable, is sent by
the master router to indicate that this router has
ceased to participate in VRRP and a backup virtual
router should transition to become a new master.
A priority of 255 is used for the router that owns the
associated IP address(es) for VRRP over IPv4 and hence
not settable.