This is applicable only for VSP4K. A bit array that contains the value of port LED status. One octet is used for each port. Each octet contains two nibbles (two 4 bits). From left to right, the first nibble (high order 4 bits) of the octet represent the Speed/InUse LED, and the second nibble (lower order 4 bits) of the octet represent the Link/Activity LED. Use the ifIndex position. Start from 192th octet. Such 192th octet for 1/1, 193 for 1/2, so on so forth. The following shows the meaning for each bit (bit 0 is most significant bit): bit meaning for Speed. 0 reserved 1 blinking (POE delievring power) 2 amber (100 Mbps) 3 green (1000 Mbps) is green. bit meaning for activity 4 reserved 5 blink (Green blink fast, Data activity. Green blick slow, port disabled) 6 amber 7 green (link Up. No Data activity)