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324 Port InfiniBand FDR Switch Platform Hardware Installation Guide
6
Chassis Power Up
With N+1 PSU redundancy the chassis must be started with a full complement of possible
PSUs, thereafter it can run on one less than the total number of PSUs. This final PSU is
redundant and allows for hot swapping a PSU should one fail. Connecting the PSUs to dif-
ferent AC lines provides AC failover protection.
The system should continue to run and allow a hot swap of a defective PSU. Should there
not be enough power to keep all of the leafs running, MLNX-OS may power down some
leafs. If this happens it will be necessary to reboot the chassis once the defective PSU has
been replaced.
With 1600W optional PSU supplies the chassis can run on as little as 1/2 of the full com-
plement of PSUs. N+N allows the chassis to run on 3 PSUs supplied from one power grid
while 3 are connected to a second power grid.
1. Check all FRUs for proper insertion and seating before connecting the AC power
cords.
Boards
Power supplies
Leaf fan modules
Spine fan modules
2. Insert all leafs that you plan to use, in the chassis.
3. Insert all spines in the chassis.
4. Insert thermal blanks in unused leaf slots to maintain balanced air flow.
5. Tighten all leaf and spine mounting screws.
6. Connect the power cords to the PSUs.
7. Connect the power cords to grounded electrical outlets.
Mellanox Technologies
Before starting any procedure on the SX
vention wrist strap on your wrist and connect to the SX
Populate the chassis with the leafs before you power up the chassis.
With N+1 1000 W PSU redundancy, do not power up the chassis with less than all
PSUs installed.
6518
series chassis system put an ESD pre-
6518
series chassis.
Rev 1.0
39
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