power supply status- N9K

[Anukalp S]

Hi. one of power supply status in nexus 9336 showing absent while another supply status is ok. Not sure what could be possible cause of it. Does it mean power supply has fail OR supply is not inserted properly into slot and not detecting.

Please clear me here.

N9K-A# sh environment
Power Supply:
Voltage: 12 Volts
Power                             Actual      Actual        Total
Supply    Model                   Output      Input      Capacity    Status
                                (Watts )    (Watts )     (Watts )
-------  -------------------  ----------  ----------  ----------  --------------
1        ------------                0 W         0 W         0 W     Absent
2        N9K-PAC-650W              180 W       194 W       649 W     Ok

Power Usage Summary:
--------------------
Power Supply redundancy mode (configured)                PS-Redundant
Power Supply redundancy mode (operational)               Non-Redundant

Total Power Capacity (based on configured mode)             649.92 W
Total Grid-A (first half of PS slots) Power Capacity          0.00 W
Total Grid-B (second half of PS slots) Power Capacity       649.92 W
Total Power of all Inputs (cumulative)                      649.92 W
Total Power Output (actual draw)                            180.00 W
Total Power Input (actual draw)                             194.00 W
Total Power Allocated (budget)                                N/A
Total Power Available for additional modules                  N/A

Clock:

[Reza Sharifi]

Hi,

Usually that means no PSU inserted.  Try "sh env power" to get more details.

HTH

[Anukalp S]

Thanks Reza, please see below required output..

N9K-A# sh env power
Power Supply:
Voltage: 12 Volts
Power                             Actual      Actual        Total
Supply    Model                   Output      Input      Capacity    Status
                                (Watts )    (Watts )     (Watts )
-------  -------------------  ----------  ----------  ----------  --------------
1        ------------                0 W         0 W         0 W     Absent
2        N9K-PAC-650W              179 W       192 W       649 W     Ok

Power Usage Summary:
--------------------
Power Supply redundancy mode (configured)                PS-Redundant
Power Supply redundancy mode (operational)               Non-Redundant

Total Power Capacity (based on configured mode)             649.92 W
Total Grid-A (first half of PS slots) Power Capacity          0.00 W
Total Grid-B (second half of PS slots) Power Capacity       649.92 W
Total Power of all Inputs (cumulative)                      649.92 W
Total Power Output (actual draw)                            179.00 W
Total Power Input (actual draw)                             192.00 W
Total Power Allocated (budget)                                N/A
Total Power Available for additional modules                  N/A

N9K-A# sh env power de
Power Supply:
Voltage: 12 Volts
Power                             Actual      Actual        Total
Supply    Model                   Output      Input      Capacity    Status
                                (Watts )    (Watts )     (Watts )
-------  -------------------  ----------  ----------  ----------  --------------
1        ------------                0 W         0 W         0 W     Absent
2        N9K-PAC-650W              182 W       197 W       649 W     Ok

Power Usage Summary:
--------------------
Power Supply redundancy mode (configured)                PS-Redundant
Power Supply redundancy mode (operational)               Non-Redundant

Total Power Capacity (based on configured mode)             649.92 W
Total Grid-A (first half of PS slots) Power Capacity          0.00 W
Total Grid-B (second half of PS slots) Power Capacity       649.92 W
Total Power of all Inputs (cumulative)                      649.92 W
Total Power Output (actual draw)                            182.00 W
Total Power Input (actual draw)                             197.00 W
Total Power Allocated (budget)                                N/A
Total Power Available for additional modules                  N/A

Power Usage details:
--------------------
Power reserved for Supervisor(s):                             N/A
Power reserved for Fabric, SC Module(s):                      N/A
Power reserved for Fan Module(s):                             N/A
Total power reserved for Sups,SCs,Fabrics,Fans:               N/A

Are all inlet chords connected: Yes

Power supply details:
---------------------
PS_2 total capacity:     649 W   Voltage:12V
Pin:197.50W  Vin:232.25V  Iin:0.85A  Pout:182.75W  Vout:12.07V  Iout:15.25A
Chord    connected to 220v AC
Software-Alarm: No
Hardware alarm_bits reg0: 2,
Reg0 bit1: A comm, memory or logic fault

[Anukalp S]

Also can you please confirm if I can remove power supply and insert it back while switch is running OR do I need to shutdown switch.

is it complete hot swappable? would it cause any issue if if do this when is switch up and running.

[Reza Sharifi]

The PSUs are hot swappable (see link below), but if you can do it during a maintenance window, it is preferable.

http://www.cisco.com/c/en/us/products/collateral/switches/nexus-9000-series-switches/datasheet-c78-729404.html

HTH

[sbhadrav@cisco.com]

Module Status
Powered-Up  value: 1
Powered-Dn  value: 2
Pwr-Denied  value: 3
Err-Pwd-Dn  value: 4
Absent  value: 5
Present  value: 6
Failure  value: 10
Pwr-Cycld  value: 8
show environment fex { all | i } [ temperature | power | fan ] [ __readonly__ fandetails fan_filter_status TABLE_faninfo fanfex fanname fanmodel fanhwver fanstatus powersup voltage_level TABLE_psinfo psfex psnum psmodel watts amps ps_status TABLE_mod_pow_info modfex modnum mod_model watts_requested amps_requested watts_alloced amps_alloced modstatus power_summary powfex ps_redun_mode tot_pow_capacity reserve_sup pow_used_by_mods available_pow TABLE_tempinfo tempfex tempmod sensor majthres minthres curtemp alarmstatus ]