User`s guide

L2 Controller
007-3938-003 3
• Provides a high-speed serial channel to communicate between the system controller
network and the hub ASIC.
• Provides a high-speed serial channel to communicate with the L1 controller as a
second brick or server. This is implemented as an RS-485 ICMB interface in the
NUMAflex cable.
• Controls Joint Test Action Group (JTAG) boundary scan.
• Logs information in Non-Volatile Random Access Memory (NVRAM).
• Provides a USB slave port to communicate with upstream system controllers.
• Provides an external high-speed serial console port.
• Provides the ability to flash the L1 firmware, which can be updated.
• Reports the population of the PCI cards and the power levels of the PCI slots.
• Powers on the PCI slots and their associated LEDs.
• Monitors the slot power for PCI boards (currently takes no action).
• Reports the power levels of the XIO slots.
• Controls the termination voltage margins of the XIO cards.
L2 Controller
The L2 controller is designed to monitor and manage the individual bricks in the Origin
3000 servers, Altix 3000 series servers, and Onyx 3000 graphics systems. It can also be
used to monitor and manage Altix 350 systems, the Origin 300 server systems, Origin 300
server systems with NUMAlink, and Onyx 300 graphics systems.
Note: The L2 controller monitoring and management functions are only available for
systems that include a hardware L2 controller.
You monitor the system with the L2 controller at a system console. You can also enter L2
controller commands to manage your system at your system console.
See Chapter 2, “Using the L1 and L2 Controllers,” for details on using the L2 controller,
and see Chapter 3, “L1 and L2 Controller Commands,” for a list of L2 controller
commands you can use to manage and monitor the different systems.