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Understanding Server Features 11
A logical domain is a discrete, logical grouping with its own operating system,
resources, and identity within a single computer system. Each logical domain can be
created, destroyed, reconfigured, and rebooted independently, without requiring a
power cycle of the server.
You can run a variety of applications software in different logical domains and keep
them independent for performance and security purposes.
Each logical domain can be managed as an entirely independent machine with its
own resources, such as:
■ Kernel, patches, and tuning parameters
■ User accounts and administrators
■ Network interfaces, MAC addresses, and IP addresses
Each logical domain can interact only with those server resources made available to
it. The configuration is controlled using the Logical Domains Manager.
Related Information
■ SPARC Enterprise T5120 and T5220 Servers Product Notes
■ Logical Domains (LDoms) software
documentation (http://docs.sun.com/app/docs/prod/ldoms)
Remote Manageability With ILOM
The Integrated Lights Out Manager (ILOM) feature is a service processor that is built
into the server, and enables you to remotely manage and administer the server.
The ILOM software is preinstalled as firmware, and initializes as soon as you apply
power to the system.
ILOM enables you to monitor and control your server over an Ethernet connection
(supports SSH), or by using a dedicated serial port for connection to a terminal or
terminal server. ILOM provides a command-line interface and a browser-based
interface that you can use to remotely administer geographically distributed or
physically inaccessible machines. In addition, ILOM enables you to run diagnostics
(such as POST) remotely that would otherwise require physical proximity to the
server’s serial port.
You can configure ILOM to send email alerts of hardware failures and warnings, and
other events related to the server. The ILOM circuitry runs independently of the
server, using the server’s standby power. Therefore, ILOM firmware and software
continue to function when the server operating system goes offline or when the
server is powered off. ILOM monitors the following SPARC Enterprise T5120 and
T5220 server conditions: