Cisco: 97xx: Power redundancy

Article Number: 494274 Article Version: 2 Article Type: Break Fix



Connectrix MDS-9706,Connectrix MDS-9710

Power supply appear to show failed for a 97xx switch

`show environment`

Power Supply:

Voltage: 50 Volts

Power Actual Total

Supply Model Output Capacity Status

(Watts ) (Watts )

——- ——————- ———– ———– ————–

1 DS-CAC97-3KW 399 W 3000 W Ok

2 DS-CAC97-3KW 431 W 3000 W Ok

3 DS-CAC97-3KW 428 W 3000 W Ok

4 DS-CAC97-3KW 0 W 0 W Shutdown


Actual Power

Module Model Draw Allocated Status

(Watts ) (Watts )

——- ——————- ———– ———– ————–

1 DS-X9448-768K9 403 W 650 W Powered-Up

2 DS-X9448-768K9 397 W 650 W Powered-Up

3 DS-X97-SF1-K9 109 W 190 W Powered-Up

4 DS-X97-SF1-K9 99 W 190 W Powered-Up

Xb1 DS-X9706-FAB1 48 W 85 W Powered-Up

Xb2 DS-X9706-FAB1 49 W 85 W Powered-Up

Xb3 DS-X9706-FAB1 49 W 85 W Powered-Up

Xb4 xbar N/A 85 W Absent

Xb5 xbar N/A 85 W Absent

Xb6 xbar N/A 85 W Absent

fan1 DS-C9706-FAN 21 W 300 W Powered-Up

fan2 DS-C9706-FAN 24 W 300 W Powered-Up

fan3 DS-C9706-FAN 18 W 300 W Powered-Up

This is a configured change, enacted by a command –

`show running-config all`

!Command: show running-config all

!Time: Mon Jan 9 08:55:30 2017

version 6.2(15)

power redundancy-mode ps-redundant

It seems that the logs show that the this is a configured change that has been set by default, and that the use of is in case of a problem, as seen below –

2016 Oct 12 03:14:01 myswitch %PLATFORM-5-PS_STATUS: PowerSupply 4 current-status is PS_SHUT

2016 Oct 12 03:14:01 myswitch %PLATFORM-2-PS_DETECT: Power supply 4 detected but shutdown (Serial number DTMxxxxxxxx)


Power Redundancy Mode

The recommended power redundancy mode will vary per Cisco Series chassis depending on the number of power supplies and the number of inputs and associated input voltage (110v/220v). Each redundancy mode provides different power allocations to allow the administrator to select the mode that is best suited for their installation.

The default mode is ps-redundant, which is recommended for most installations.

ps-redundant option – Power Supply Redundancy – Provides an extra power supply in the event one fails or is removed from the chassis.

The system has put the 4th PS into shutdown mode (in case of a failure)

There is no issue, this is as designed.

Related:

Smarts IP: Do Down alarms get generated if all devices in a System Redundancy Group go down?

Article Number:498150

Article Title and Link for Registered Users: Smarts IP: Do Down alarms get generated if all devices in a System Redundancy Group go down?

Affected Product(s): Smarts IP Manager

Article Summary:If there are two devices A and B in a system redundancy group and they both go down will the devices still generate device Unresponsive and device Down alarms along with System Redundnacy Group AllComponentsDown? The answer is yes. The redundant events will not suppress the device related problems/events. …

Article Last Updated:March 31, 2017

Please note that this abstract is machine-generated. Registered users should click the above link to view the entire knowledge article from Dell EMC Online Support, otherwise please contact Dell EMC Customer Service for further assistance.

Related:

Redundant Power Supply Sloshing (If sloshing is the right word)

I have a Supermicro Redundant Power Supply with two units in it. I also have two UPS units, one for each of the Power Supplys. I was watching the LCD on the UPSs for the watt usage. The total watts equal about 400 Watts. This is where it gets strange. I observed the following, something that i have not seen on any of my 30 other Supermicro Redundant Power Supply setups.

It starts with...
    UPS1 200 Watts UPS2 200 Watts.
    Stays the same for 3 seconds and then changes with in a second to...
    UPS1 0 Watts UPS2 400 Watts.
    Stays the same for 3 seconds and then changes with in a second to...
    UPS1 200 Watts UPS2 200 Watts.
    Stays the same for 3 seconds and then changes with in a second to...
    UPS1 400 Watts UPS2 0 Watts.
    Stays the same for 3 seconds and then starts the cycle over again. 

The wattage is sloshing back and forth 200 Watts at a time from one UPS to the other. I know it has been doing this for at least 6 hours now and i am not sure how if it was doing this before or not.

Does anyone have any ideas of what may be going on. Maybe some things i could try?

Related:

LDM – Volume Health state change rule

Details
Product: Windows Operating System
Event ID: 55
Source: DiskPart
Version: 5.2.3790.1830
Message: LDM – Volume Health state change rule
   
Explanation

This event occurs any time the health state of a volume changes. The possible health states are:

  • Healthy.
  • Failed.
  • Rebuilding.
  • Regenerating.
  • Failing redundancy mode.
  • Failed redundancy mode.
  • Failed redundancy failing.

Related: