82598EB Datasheet, PDF (109/596 Pages) Intel Corporation – Intel® 82598EB 10 Gigabit Ethernet Controller Datasheet

Intel^® 82598EB 10 GbE Controller - Manageability Interfaces (SMBus/NC-SI)
Note:
The official document that defines EUI-64* is: http://standards.ieee.org/regauth/oui/
tutorials/EUI64.html
For EEPROM-less configuration, the serial number capability is not supported.
3.1.2 Manageability Interfaces (SMBus/NC-SI)
The 82598 supports pass-through manageability through an on-board BMC. The BMC can be either a
stand-alone device or integrated into an Input/Output Hub (IOH). The link between the 82598 and the
BMC is NC-SI, SMBus, or a combination of both (see Table 3-33).
Table 3-33 lists the different options for the 82598 manageability links.
Table 3-33. 82598 Manageability Links
Configuration
BMC legacy
DMTF standard
NC-SI back-up
mode
Interfaces
SMBus
NC-SI
NC-SI
SMBus
Pass Through
X
X
X
-
Configuration
X
X
-
X
The 82598 supports two interfaces to an external BMC:
• SMBus
• NC-SI
Note:
Since the manageability sideband throughput is lower than the network link throughput, the
82598 allocates an 8 kB internal buffer for incoming network packets prior to being sent over
the sideband interface.
3.1.2.1 SMBus Pass-Through Interface
SMBus is the system management bus defined by Intel® Corporation in 1995. It is used in personal
computers and servers for low-speed system management communications. The SMBus interface is
one of two pass-through interfaces available in the 82598.
3.1.2.1.1 General
The SMBus sideband interface includes the standard SMBus commands used for assigning a slave
address and gathering device information for the pass-through interface.
3.1.2.1.2 Pass-Through Capabilities
When operating in SMBus mode, in addition to exposing a communication channel to the LAN for the
BMC, the 82598 provides the following manageability services to the BMC:
• ARP handling - The 82598 can be programmed to auto-ARP replying for ARP request packets to
reduce the traffic over the BMC interconnect.
• Teaming and fail-over - The 82598 can be configured to one of several teaming and fail-over
configurations:
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