174 IBM Power 720 and 740 Technical Overview and Introduction
Service processor
The service processor is a controller that is running its own operating system. It is a
component of the service interface card.
The service processor operating system has specific programs and device drivers for the
service processor hardware. The host interface is a processor support interface that is
connected to the POWER processor. The service processor is always working, regardless of
the main system unit’s state. The system unit can be in the following states:
Standby (power off)
Operating, ready to start partitions
Operating with running logical partitions
The service processor is used to monitor and manage the system hardware resources and
devices. The service processor checks the system for errors, ensuring that the connection to
the management console for manageability purposes and accepting Advanced System
Management Interface (ASMI) Secure Sockets Layer (SSL) network connections. The service
processor provides the ability to view and manage the machine-wide settings by using the
ASMI, and enables complete system and partition management from the management
console.
The service processor uses two Ethernet ports running at 100 Mbps speed. Consider the
following information:
Both Ethernet ports are only visible to the service processor and can be used to attach the
server to an HMC or to access the ASMI. The ASMI options can be accessed through an
HTTP server that is integrated into the service processor operating environment.
Both Ethernet ports support only auto-negotiation. Customer selectable media speed and
duplex settings are not available.
Both Ethernet ports have a default IP address, as follows:
– Service processor eth0 (HMC1 port) is configured as 169.254.2.147.
– Service processor eth1 (HMC2 port) is configured as 169.254.3.147.
The following functions are available through service processor:
Call home
Advanced System Management Interface (ASMI)
Error Information (error code, part number, location codes) menu
View of guarded components
Limited repair procedures
Generate dump
LED Management menu
Remote view of ASMI menus
Firmware update through USB key
Advanced System Management Interface
Advanced System Management Interface (ASMI) is the interface to the service processor that
enables you to manage the operation of the server, such as auto-power restart, and to view
information about the server, such as the error log and vital product data. Various repair
procedures require connection to the ASMI.
Analyze system that does not boot: The service processor enables a system that does
not boot to be analyzed. The error log analysis can be done from either the ASMI or the
management console.
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