hwBoardIndex 1.3.6.1.4.1.2011.6.157.2.1.1.1

Index: reserved/shelf/frame/slot. The index is format by 4 bytes(8bit for 1 byte): reservedByte(0xFF), shelfID, frameID, slotID. e.g. shlef=1, frame=2, slot=17, the index is 0xFF010211(66065). If no shelfID or frameID, the corresponding byte is set to be 0xFF. e.g. no shlefID, no frameID, slot=17, the index is 0xFFFFFF11(4294967057).