IBA Global Address = IPv6 Address
The global IBA address that is used to address a CA port is compliant with the 128-bit address format defined in the IPv6 specification. It takes the basic format shown in Figure 8-3 on this page:
The upper 64 bits identifies the subnet within which the port resides. A detailed description of the subnet ID can be found in “Port's Subnet ID Assignment” on page 155.
The lower 64 bits uniquely identifies the port and is referred to as the port's Globally Unique ID (GUID). It consists of an identifier assigned by a central authority and guaranteed to be unique in the context of the universe. Additional information can be found in “Port's GUID(s) Assignment” on page 156 and “Multiple GUID Assignment Permits Router ...
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