The hpVgGrpPortsTrained is a bit map which indicates
which ports in this group are currently online. The
object has a one bit for each port for which meets
the following conditions:
1. The value of the corresponding instance of the
ifVgPortAdminStatus object is equal to
'enabled(1)'.
2. The value of the corresponding instance of the
icfVgPortStatus object is equal to 'active(1)'.
The object has a zero bit for each port which does
not meet the above conditions.
The bits are placed into the OCTET STRING in the
following order:
octet 0 octet 1 octet 2 ...
bits 7-0 bits 7-0 bits 7-0 ...
ports 1-8 ports 9-16 ports 17-24 ...
Values of unused bits in the last octet are
undefined.