Specifies the operational mode of the port group.
other - none of the following. This value is a
read-only value and can not be set on
any instance of this object.
tenGigabitEthernet - this port group is operated with
10 Gigibit Ethernet port mode.
forthGigabitEthernet - this port group is operated with
40 Gigabit Ethernet port mode.
Modification on the instance value of this object may cause
the corresponding module to be reset.