The value of vRtrMldGenAdminState specifies the current administrative
state of the MLD protocol instance on this virtual router.
When vRtrMldGenAdminState is set to 'inService', the agent
attempts to enable the MLD protocol instance on this virtual router.
When vRtrMldGenAdminState is set to 'outOfService', the
agent attempts to disable the MLD protocol instance on this
router.