The port list in the trunk group. The ports are presented
in bitmap format.
in receiving order:
OCTET 1 OCTET 2 .....
xxxxxxxx xxxxxxxx .....
|| || |_ port 8
|| ||
|| ||___ port 7
|| |____ port 6
|| . . .
||_________ port 1
|__________ reserved
where x : 1 - The represented port belongs to the trunk group
0 - The represented port does not belong to the trunk group