The set of ports configured by management in this VLAN
to which all multicast group-addressed frames are to be
forwarded. Ports entered in this list will also appear
in the complete set shown by gDot1qForwardAllPorts. This
value will be restored after the device is reset. This
only applies to ports that are members of the VLAN,
defined by gDot1qVlanCurrentEgressPorts. A port may not
be added in this set if it is already a member of the
set of ports in gDot1qForwardAllForbiddenPorts. The
default value is a string of ones of appropriate length,
to indicate standard non-EFS behaviour, i.e. forward
all multicasts to all ports.