Fan Redundancy; Table 4: Power Supply Opn - Mellanox Technologies Switch-IB User Manual

The chassis PSUs are fed from two power grids for high availability. The second power grid
can be supplied by any of the following:
• a backup power supply grid
• a generator
• a battery backup system
• any combination of the above
Connecting 3 power supplies to one power supply grid and the remaining 3 power supplies to a
secondary power supply grid will create N+N redundancy. This is high availability. Under
these conditions should a power grid fail (an electric company power failure or blackout for
example) power grid High Availability will continue to keep the chassis running at full capacity
through the secondary or backup power supply grid.
The system cannot run with less than 3 PSUs, thus if one of the power grids is down
there is no power or PSU redundancy in the system.
When the power drops below the required minimum due to power supply failure, MLNX-OS®
may power down some leafs. If this happens it may be necessary to reboot the chassis once the
defective PSU has been replaced. Two ways to reboot are to use the reboot command in the CLI
or reboot through the WebUI.
Table 4 - Power Supply OPN
PSU OPN
MTDF-PS-A 2500W
1.5

Fan Redundancy

Whether it is a chassis, or a spine fan unit, Mellanox's EDR director switch chassis supports sin-
gle fan failure without performance degradation.
When a fan unit fails, it must remain in the chassis until a replacement is available. At that point,
the failed fan unit must be promptly replaced so that the chassis remains with an empty slot for as
little time as possible.
Mellanox Technologies
Wattage
Supplies N+N redundancy for all switch chassis at 220 Volts
Description
Overview
18