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The LOM port ''(Lights Out Management port)'' is a remote access facility on a
Netra-T1 AC200 LOM Usage
Computer buses Out-of-band management Sun Microsystems hardware {{compsci-stub
Sun Microsystems
Sun Microsystems, Inc., often known as Sun for short, was an American technology company that existed from 1982 to 2010 which developed and sold computers, computer components, software, and information technology services. Sun contributed sig ...
server. When the main processor is switched off, or when it is impossible to telnet
Telnet (sometimes stylized TELNET) is a client-server application protocol that provides access to virtual terminals of remote systems on local area networks or the Internet. It is a protocol for bidirectional 8-bit communications. Its main ...
to the server, an operator would use a link to the LOM port to access the server. As long as the server has power, the LOM facility will work, regardless of whether or not the main processor is switched on.
To use the LOM port, a rollover cable
Rollover or roll over may refer to:
Arts and entertainment
* Rollover (film), ''Rollover'' (film), a 1981 American political thriller
*''Roll Over'', a 1992 album by Hound Dog (band), Hound Dog
* "Roll Over", a 2006 song by Zico Chain
* "Roll Ove ...
or nullmodem serial DB9 cable on some models is connected to the LOM port, which is located at the back of the Sun server. The other end of the cable is connected to a terminal or a PC running a terminal emulator
A terminal emulator, or terminal application, is a computer program that emulates a video terminal within some other display architecture. Though typically synonymous with a shell or text terminal, the term ''terminal'' covers all remote term ...
. The terminal or emulator must be set to a transmission rate of 9600 bits per second, and hardware flow control enabled.
Implementations
Specific implementations include: * Advanced Lights Out Management (ALOM), Sun Microsystems-specific and comes standard on newer Sun servers ( SunFire V125/V210/V215/V240/V245/V250/V440/T1000/T2000,Sun Netra The Sun Netra brand has been used for a variety of server computers from Sun Microsystems since 1994. The original Netra servers (such as the Netra ''i'' and Netra ''j'' models) were re-badged SPARCstation and Sun Ultra series systems bundled wit ...
210/240/440).
* Integrated Lights Out Management (ILOM), Sun Microsystems's ALOM replacement on Sun x64 server SunFire X4100(M2)/X4200(M2)/X4600(M2)/X4140/X4240/X4440/X4150/X4250/X4450/X4170/X4270/X2250/X2270, Sun Blade 6000 Chassis Management Module/Blade Module(X6220/X6420/X6240/X6440/X6250/X6450/X6270/X6275), Sun CMT servers/blades (Sun T5120, T5220, T5240, T6340, T6320). Not to be confused with the similar-sounding HP Integrated Lights-Out
Integrated Lights-Out (iLO) is a proprietary embedded server management technology by Hewlett Packard Enterprise which provides out-of-band management facilities. The physical connection is an Ethernet port that can be found on most ProLiant serv ...
management technology.
* Lomlite and Lomlite2 Single-chip implementations on the Netra T1 and possibly others. In the cases of the T1-200 and X1, the OpenBoot firmware implements lom@ and lom! commands allowing access to the registers representing temperature, voltage, etc.
See also
*Out-of-band management
In systems management, out-of-band management (OOB; also lights-out management or LOM) is a process for accessing and managing devices and infrastructure at remote locations through a separate management plane from the production network. OOB all ...
* Power distribution unit
A power distribution unit (PDU) is a device fitted with multiple outputs designed to distribute electric power, especially to racks of computers and networking equipment located within a data center. Data centers face challenges in power protec ...
References
External links
Netra-T1 AC200 LOM Usage
Computer buses Out-of-band management Sun Microsystems hardware {{compsci-stub