Each bit in this octet string indicates that the correspondig port's ifOperStatus is ON if set. The mapping of port number to bits in this octet string is as follows: The port with the L2 interface number 1 is mapped to the least significant bit of the 1st octet, the port with L2 ifNumber 2 to the next significant bit in the 1st octet, port 8 to the most-significant bit of the in the 1st octet, port 9 to the least significant bit of the 2nd octet, etc. and in general, port n to bit corresponding to 2**((n mod 8) -1) in byte n/8 + 1