The main board identifier, which can uniquely identify a board type. It is an encoded octet string with the following meaning: octet 0 - octet string format version, which identifies the format of this string. If format version octet has the value 1, the octets after the version octet have the following meaning: octet 1 - product type, FIWG=0x57, FIBB=0x42, FIMLS=0x4D NI=0x4E, TI=0x54, TIRT=0x52 octet 2 - board type, POWERPC=1, ALPHA=2 The length of the octet string is 27. If format version octet has the value 2, the octets after the version octet have the following meaning: octet 1 - product type: BI_WG 0x57 BI_BB 0x42 BI_NI 0x4E NI_M4 0x4D BI_SLB 0x53 octet 2 - module type: MASTER_FIBER_8G 0x0 MASTER_FIBER_4G 0x1 MASTER_COPPER_16 0x2 FI_MASTER_FIBER_2G 0x4 FI_MASTER_FIBER_4G 0x5 MASTER_COPPER_8G 0x6 FI_MASTER_FIBER_8G 0x7 MASTER_COPPER_12_2 0x9 MASTER_FIBER_2G 0x12 MASTER_FIBER_0G 0x14 FI_MASTER_COPPER_8G 0x1D FI_MASTER_COPPER_4G 0x1F FI_MASTER_COPPER_2G 0x20 MASTER_COPPER_4G 0x21 MASTER_COPPER_2G 0x22 MASTER_M4_8G 0x23 MASTER_M4_4G 0x24 MASTER_M4_0G 0x26 The length of the octet string is 28. Both format version 1 and 2: octet 3 - processor type, PVR_M603=3, PVR_M604=4, PVR_M603E=6, PVR_M603EV=7, PVR_M604E=9 octet 4 to octet 5 - processor speed in MHz octet 6 - MAC type: MAC_NONE=0, MAC_SEEQ_10_100=1, MAC_DEC_10_100=2, MAC_SEEQ_1000=5, MAC_GMAC_1000=6, MAC_VLSI_1000=7 octet 7 - PHY type, PHY_NONE=0, PHY_QSI=1, PHY_BROADCOM=2, PHY_ICS=3, PHY_NATIONAL=4, PHY_LEVEL1=6, PHY_LEVEL16=7, PHY_LEVEL24=8 octet 8 - port type, COPPER=0, FIBER=1 octet 9 - fiber port type, NONFIBER=0, SX_FIBER=1, LX_FIBER=2, LHX_FIBER=3, LX_SX_FIBER=4, LHB_FIBER=5 octet 10 to octet 13 - DRAM size in KBytes octet 14 to octet 17 - boot flash size in KBytes octet 18 to octet 21 - code flash size in KBytes octet 22 to octet 27 - serial number. Format version 1 only: octet 28 - chassis backplane type. chassis4000 = 0x00 chassis8000 = 0x04 chassis15000 = 0x05 Turbo8 = 0x07 (stack2) FastIron2 = 0x06 (stack1)