The value of the object tmnxSubIpoeLinkAdminState specifies
whether hosts with matching SAP id and MAC address are groupped.
One group contains up to three hosts (DHCP lease state, DHCPv6
delegated prefix, DHCPv6 non-temporary address or SLAAC prefix).
The value of this object can only be set to 'inService'
when no IPoE hosts are present.