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|Sun Network QDR InfiniBand Gateway Switch HTML Document Collection for Firmware Version 2.0|
Global unique identifiers (GUIDs) are unique 64-bit strings that identify nodes such as switches and channel adapters. For the Sun Datacenter InfiniBand switches and this gateway, GUIDs are modified to identify the node’s role and location. This table describes the GUID’s structure.
The five fields of the GUID are described as follows:
MAC – Bits 63 through 16 are the Machine Allocation Code (MAC) address. A standard for network components, the MAC address is typically provided by manufacturers in a 6-byte, colon delimited string. For example, 00:11:22:33:44:55.
Type – Bits 15 through 12 is the type of board on which the node resides.
Pos – Bits 11 through 8 identify the position of the board within the gateway.
Device – Bits 7 through 4 identify which device on the board has that node.
Num – Bits 3 through 0 are numbers reserved for the programs which modify the GUID. In most occurrences, the value is 0x2.
This table provides values for Type, Pos, Device.
For example, given this output from the ibnodes command:
Ca : 0x0021283bad45c000 ports 2 "SUN IB QDR GW switch gw-2 Bridge 0"
The GUID is 0x0021283bad45c000 or 0021283BAD45 C 0 0 0. Using the information provided in this topic:
The MAC address is 0x0021283BAD45 or 00:21:28:3B:AD:45.
The type is 0xC, or a gateway.
The position is 0x0.
The device is 0x0, or BridgeX chip 0.
The number is 0.