This object specifies the current speed group
configuration on the given interface.
'notApplicable' - the interface speed group configuration on
this interface is not applicable. It is a
read-only value.
'10G' - the interface speed group configuration on
this interface as 10G.
'1G-2G-4G-8G' - the interface speed group configuration
on this interface as 1G-2G-4G-8G.
'2G-4G-8G-16G' - the interface speed group configuration
on this interface as 2G-4G-8G-16G.