Introduction
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supplies power to the Midplane via a special power harness, and provides connectivity to the
Midplane and the fan units (sFU-40H).
Air Flow Cooling System
The Grid Director 4700 uses front-to-back air flow cooling and provides full internal
redundancy, monitored fans. Fan speed is dynamically controlled as a function of temperature.
The air cooling system includes a horizontal fan unit (sFU-40H), containing eight fans and A
vertical fan unit (sFU-40V) containing five fans.
LED indicators on the horizontal fan unit sFU-40H provide an on-site report on the operating
conditions of the air cooling system modules, and provide an alarm indicator in the event of a
high temperature condition.
InfiniBand Switch Silicon Firmware
Each Line Board and Fabric Board incorporates InfiniBand 36-port switch (ASIC) devices
with locally attached memory containing firmware that controls basic functionality of the
devices. The firmware controls low level link and physical layers functionality and may be
upgraded via Ethernet or RS-232 on the Management Board or in-band via any of the
InfiniBand Line Board ports.
InfiniBand products are RoHS-6 compliant.
Management
The Grid Director 4700 provides a command line interface (CLI) interface for flexible access
the switch comprehensive management capabilities.
Device Management (DM)
Control a device (e.g., a switch) or a device cluster
Remote management, upgrades, logs/alarms
Management Board
The Grid Director supports either one or two hot-swappable Management Boards.
Power Supplies (sPSU-S)
Mellanox Grid Director switches support multiple power supply modules (sPSU-S)
configured in redundant, hot-swap, current sharing mode for N:1 or N:N redundancy,
depending on the configuration, and suitable for 100-240 VAC mains voltage (auto-sense).
The Grid Director supports up to six power supply modules.
1.3.2
Reset Buttons
In the rare event of a 4700 system lock-up, the Reset button can be used to reset the system.
The system has two Reset buttons: one is located on the front panel of the sFU-40H fan
assembly horizontal fan unit, a second one is on the sMB-CM Management Board front panel.
Management Reset
To reset the Grid Director 4700, push any of the reset buttons using a thick wire or tip of a pen.
Pressing the Reset button for one second resets the sMB-CM Management Board only;
pressing the Reset button for at least six seconds resets the entire chassis.