Connectrix Cisco MDS-9700: How to change power supply redundancy mode to grid redundancy

Summary: This article explains the steps involved changing power supply redundancy mode to grid redundancy on the MDS 9700 series switch.

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Instructions

Power supply modes supported on MDS 9700 series switch are:
  • Combined mode - This mode uses the combined capacity of all the power supplies. If there is a power supply failure, the entire switch can be shut down (depending on the power used) causing traffic disruption. This mode is seldom used, except in cases when the switch requires more power.
  • Input Source (grid) redundancy mode - This mode allocates half of the power supplies to the available category and the other half to the reserve category. You must use different power supplies for the available and reserve categories so that if the power supplies used for the active power fails, the power supplies used for the reserve power can provide power to the switch. If the grid-redundancy mode is lost, the power mode reverts to combined mode.
  • Power-supply (N+1) redundancy mode - This mode allocates one power supply as reserve to provide power to the switch in case an active power supply fails. The remaining power supplies are allocated for the available category. The reserve power supply must be at least as powerful as each of the power supplies used for the active power.
  • Full-redundancy mode - This mode is a combination of input-source (grid) and power-supply (N+1) redundancy modes. Similar to the input-source redundancy mode, this mode allocates half of the power supplies to the available category and the remaining power supplies to the reserve category. One of the reserve power supplies can alternatively be used to provide power if a power supply used for the active power fails.
Changing between power modes is non-disruptive and is possible only if there is enough power available in the target mode. If enough power is not available, MDS NX-OS rejects the command with "Insufficient capacity" message.
  1. Check the show running-configwith the feature power redundancy-mode to be ps-redundant.
  2. Use the below command to change to Input Source (grid) redundancy mode:
Syntax: # power redundancy-mode {combined | insrc-redundant | ps-redundant |redundant }
  1. Enter the switch configure mode:
switch(config)# power redundancy-mode insrc-redundant
switch(config)# 2024 Jan 13 12:40:22 mds9706 %PLATFORM-4-PFM_PS_RED_MODE_CHG: Power redundancy mode changed to insrc-     redundant
  1. Verify the changes by using the below command:
switch(config)# show environment power
Example:  
switch(config)# show environment power 
Voltage: 50 Volts
Power                              Actual        Total
Supply    Model                    Output     Capacity    Status
                                 (Watts )     (Watts )
-------  -------------------  -----------  -----------  --------------
1        DS-CAC97-3KW               333 W       3000 W     Ok        
2        DS-CAC97-3KW               345 W       3000 W     Ok        
3        DS-CAC97-3KW               345 W       3000 W     Ok        
4        DS-CAC97-3KW               337 W       3000 W     Ok        
                                  Actual        Power      
Module    Model                     Draw    Allocated    Status
                                 (Watts )     (Watts )     
-------  -------------------  -----------  -----------  --------------
1        DS-X9848-480K9             354 W        500 W    Powered-Up
3        DS-X97-SF1-K9              107 W        190 W    Powered-Up
4        DS-X97-SF1-K9              105 W        190 W    Powered-Up
6        DS-X9448-768K9             403 W        650 W    Powered-Up
Xb1      DS-X9706-FAB1               48 W         85 W    Powered-Up
Xb2      DS-X9706-FAB1               47 W         85 W    Powered-Up
Xb3      DS-X9706-FAB1               48 W         85 W    Powered-Up
Xb4      DS-X9706-FAB1               48 W         85 W    Powered-Up
Xb5      DS-X9706-FAB1               48 W         85 W    Powered-Up
Xb6      DS-X9706-FAB1               48 W         85 W    Powered-Up
fan1     DS-C9706-FAN                29 W        300 W    Powered-Up
fan2     DS-C9706-FAN                29 W        300 W    Powered-Up
fan3     DS-C9706-FAN                33 W        300 W    Powered-Up
N/A - Per module power not available
Power Usage Summary:
--------------------
Power Supply redundancy mode (configured)                InSrc-Redundant
Power Supply redundancy mode (operational)               InSrc-Redundant
Total Power Capacity (based on configured mode)               6000 W
Total Power of all Inputs (cumulative)                       12000 W
Total Power Output (actual draw)                              1360 W
Total Power Allocated (budget)                                3090 W
Total Power Available for additional modules                  2910 W

Additional Information

Refer to this video:

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Affected Products

Connectrix MDS-9710
Article Properties
Article Number: 000212404
Article Type: How To
Last Modified: 22 Aug 2024
Version:  3
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