Cisco 6500 power supply and module (hot-swappable?)

[Fabio Bustamante]

Hi everyone!

We have currently a Cisco 6500 with 2 power supply of 3000w. We want to replace these PS for 2 new ones, which have higher wattage: 6000w. 

Can we replace them without needing to turn the 6500 off?. I mean, What happens if we insert a 6000w PS and the switch is working with one 3000w PS?

Is it possible to do this replacement "on hot"?

And second, we also have a ws-x6708-10g-3c module. Can we insert this module "on hot"? Without needing to turn the Catalyst 6500 off? 

Thanks a lot! and looking forward to an answer.

[Kelvin Willacey]

Both support online insertion and removal so yes they are hot swappable, however I would make sure one power supply can keep the chassis up and running.

[Fabio Bustamante]

Thanks!.

But, i have one question. According to Cisco documentation, when I plug in the 6000w Power Supply, it disables the 3000w one.  "With redundancy enabled, if you power up the system with two power supplies of unequal wattage, both power supplies come on line with a corresponding syslog message. The message indicates that the lower-wattage power supply will be disabled. If the active power supply fails, the lower-wattage power supply that was disabled comes on line" 

Would this cause any interruption, or can we be certain that the switch will remain powered?

[Kelvin Willacey]

Depends on your setup the table should be able to help:

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/pwr_envr.html#wp1020384

Configuration Change	Effect
Redundant to nonredundant	•System log and syslog messages are generated. •System power is increased to the combined power capability of both power supplies. •Modules marked power-deny in the show power oper state field are brought up if there is sufficient power.
Nonredundant to redundant (both power supplies must be of equal wattage)	•System log and syslog messages are generated. •System power is decreased to the power capability of one supply. •If there is not enough power for all previously powered-up modules, some modules are powered down and marked as power-deny in theshow power oper state field.
Equal wattage power supply is inserted with redundancy enabled	•System log and syslog messages are generated. •System power equals the power capability of one supply. •No change in module status because the power capability is unchanged.
Equal wattage power supply is inserted with redundancy disabled	•System log and syslog messages are generated. •System power is increased to the combined power capability of both power supplies. •Modules marked power-deny in the show power oper state field are brought up if there is sufficient power.
Higher or lower wattage power supply is inserted with redundancy enabled	•System log and syslog messages are generated. •The system does not allow you to operate a power supply of different wattage even if the wattage is higher than the installed supply. The inserted supply shuts down.
Higher or lower wattage power supply is inserted with redundancy disabled	•System log and syslog messages are generated. •System power is increased to the combined power capability of both power supplies. •Modules marked power-deny in the show power oper state field are brought up if there is sufficient power.
Power supply is removed with redundancy enabled	•System log and syslog messages are generated. •No change in module status because the power capability is unchanged.
Power supply is removed with redundancy disabled	•System log and syslog messages are generated. •System power is decreased to the power capability of one supply. •If there is not enough power for all previously powered-up modules, some modules are powered down and marked as power-deny in theshow power oper state field.
System is booted with power supplies of different wattage installed and redundancy enabled	•System log and syslog messages are generated. •The system does not allow you to have power supplies of different wattage installed in a redundant configuration. The lower wattage supply shuts down.
System is booted with power supplies of equal or different wattage installed and redundancy disabled	•System log and syslog messages are generated. •System power equals the combined power capability of both power supplies. •The system powers up as many modules as the combined capacity allows.

[Rajeev Sharma · Accepted solution]

Hey,

Just adding a few things to this post. I am hoping you have 2PS 3000W units running in redundant mode (check with show power command) then perform the following:

1. Change the power redundancy mode to combined

2. Replace the PS units

3. When both the PS slots will have 6000W power supplies, configure the power redundancy mode to redundant again.

HTH.

Regards,

RS.

[Rajeev Sharma · Accepted solution]

Also check:

https://supportforums.cisco.com/discussion/12261821/upgrade-power-supply-cat-6506-form-3000w-6000w

Regards,

RS.

[Fabio Bustamante]

Thanks to everyone!.

[Joseph W. Doherty]

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.

Posting

BTW, you didn't mention whether your 6500 chassis was the original or a later 6500E chassis.  The former cannot take all the same power supplies as the latter - but off the top of my head, I don't recall what the maximum was for the original 6500 series.