WS-3850 / Replace default PWR-C1-1100WAC with PWR-C1-715WAC, possible ?

[Elrick Landon]

Hi to all,

I didn't mean to have PWR-C1-1100WAC as default module into my switch (WS-C3850-48F-S), so i would like to know if i can replace this module with PWR-C1-715WAC ?

My current 1100W module is noisy (fan noise) and i thinks that it will reduce the power consumption of my switch and it will be more efficient, because i have only 4 POE device on it.

Does it can be possible to replace it on my device ?

Best Regards.

[MUHAMMAD TAYYAB MUNIR]

Hi Elrick, 

Yes, its possible and should works fine without any issue. I have attached the picture of the power supply. FYI

Regards,

Tayyab

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[balaji.bandi]

yes it is possible, if you do not required higher capacity, make sure you save configuration and copy the configuration outof box for safe side, change in maintenance window.

look at PSU installation guide.

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/hardware/installation/guide/b_c3850_hig/b_c3850_hig_chapter_0100.html

[Elrick Landon]

This is not plug n play ? I need to change something ?

I didn't see any command line to execute into your web link :(

What i need to do please ?

[balaji.bandi]

I know this is plug and play, if you have other PSU as resilience, if you have only 1, the switch will go down..so i suggested safe menthod

[Elrick Landon]

Sorry, xould like to be sure.

The target is to replace 1100W by 750W, so only one slot will be used.

1100W will be sale after.

In this case, does the 750W will work with my switch (not go down) ? or does i need to pass specific command line ?

[MUHAMMAD TAYYAB MUNIR · Accepted solution]

I shared the snapshot of PS from removing the working switch and tested
myself,so go ahead and replace the PS.

[MUHAMMAD TAYYAB MUNIR]

Hi 

I have tested for your satisfaction so now without any hesitation you can go ahead and replace the PS :)

Find an attached snapshot of testing :D

AS-3850-614-01-01#show environment all
Switch 1 FAN 1 is OK
Switch 1 FAN 2 is OK
Switch 1 FAN 3 is OK
FAN PS-1 is OK
FAN PS-2 is OK
Switch 1: SYSTEM TEMPERATURE is OK
SW PID Serial# Status Sys Pwr PoE Pwr Watts
-- ------------------ ---------- --------------- ------- ------- -----
1A PWR-C1-715WAC DCA2026G45U OK Good Good 715
1B PWR-C1-1100WAC DTN2023V365 OK Good Good 1100

AS-3850-614-01-01#ter
*Jan 20 21:57:58.504: %NGWC_PLATFORM_FEP-1-FRU_PS_SIGNAL_FAULTY: Switch 1: signal on power supply A is faulty mon
% Console already monitors
AS-3850-614-01-01#show environment all
Switch 1 FAN 1 is OK
Switch 1 FAN 2 is OK
Switch 1 FAN 3 is OK
FAN PS-1 is OK
FAN PS-2 is OK
Switch 1: SYSTEM TEMPERATURE is OK
SW PID Serial# Status Sys Pwr PoE Pwr Watts
-- ------------------ ---------- --------------- ------- ------- -----
1A PWR-C1-715WAC DCA2026G45U No Input Power Bad Bad 715
1B PWR-C1-1100WAC DTN2023V365 OK Good Good 1100

AS-3850-614-01-01#
*Jan 20 21:58:14.888: %NGWC_PLATFORM_FEP-6-FRU_PS_OIR: Switch 1: FRU power supply A removed
*Jan 20 21:58:37.648: %NGWC_PLATFORM_FEP-6-FRU_PS_OIR: Switch 1: FRU power supply A inserted
*Jan 20 21:58:51.116: %NGWC_PLATFORM_FEP-1-FRU_PS_SIGNAL_OK: Switch 1: signal on power supply A is restored
AS-3850-614-01-01#show environment all
Switch 1 FAN 1 is OK
Switch 1 FAN 2 is OK
Switch 1 FAN 3 is OK
FAN PS-1 is OK
FAN PS-2 is OK
Switch 1: SYSTEM TEMPERATURE is OK
SW PID Serial# Status Sys Pwr PoE Pwr Watts
-- ------------------ ---------- --------------- ------- ------- -----
1A PWR-C1-715WAC DCA2026G45U OK Good Good 715
1B PWR-C1-1100WAC DTN2023V365 OK Good Good 1100

AS-3850-614-01-01#