Mellanox Technologies Switch-IB, User Manual

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Troubleshooting
93 Mellanox Technologies
Check that the Subnet Manager has been started.
6.3 Management Module
Issue 1.
Amber Status LED for the chassis on the management module is lit
1. Check the MLNX-OS management for confirmation and possible explanation of the alert.
2. Reset the master management module by pushing the rest button. If you have two manage-
ment modules installed this will convert the master management module to the slave and con-
vert the slave to the master.
3. Make sure the S.Fans and L.Fans LEDs are green.
4. Make sure that the spine and the leafs both have the same version of FW.
5. Reburn the FW and remove and reinstall the management module.
6. If you are running the chassis with only one management module, remove and reinstall the
management module. Make sure the mating connectors of the unit are free of any dirt and/or
obstacles. See
Section 2.7.5 on page 64 .
7. If you are running the chassis with only one management module, replace the management
module.
Issue 2.
Amber LED for the leaf fan on the management module is lit
1. Check the MLNX-OS management for confirmation and possible explanation of the alert.
2. Make sure that there is nothing blocking the front or rear of the chassis and that the fan mod-
ules and ventilation holes are not blocked (especially dust over the holes).
3. If you find dust blocking the holes it is recommended to clean the fan unit and remove the
dust from the front and rear panels of the switch using a vacuum cleaner.
4. Determine which fan module is problematic by checking the status LED on each fan module.
5. Remove and reinstall the problematic fan unit. Make sure the mating connector of the new
unit is free of any dirt and/or obstacles. See Section 2.7.4 on page 61 .
6. Replace the Leaf fan module.
Issue 3.
Amber LED for the spine fan on the management module is lit
1. Check the MLNX-OS management for confirmation and possible explanation of the alert.
If there is only one management module in the chassis all of the leafs and ports
are reset by bringing them down and powering them up when the management
module is removed.
Replace defective leaf fan modules as soon as they are identified.
Should any of the modules shut down due to over temperature, follow the procedure
starting in
Step 2