4500E change input voltage

[dan.letkeman]

Hello,

Just wondering if anyone has switched from 110v to 220v on a 4500 chassis without shutting it off?

Power                                             Fan      Inline
Supply  Model No          Type       Status       Sensor   Status
------  ----------------  ---------  -----------  -------  -------
PS1     PWR-C45-4200ACV   AC 4200W   good         good     good
PS1-1                         110V   good
PS1-2                         110V   good
PS2     PWR-C45-4200ACV   AC 4200W   good         good     good
PS2-1                         110V   good
PS2-2                         110V   good

Power supplies needed by system    : 1
Power supplies currently available : 2

Power Summary                      Maximum
 (in Watts)              Used     Available
----------------------   ----     ---------
System Power (12V)        877        1360
Inline Power (-50V)         0        1183
Backplane Power (3.3V)     40          40
----------------------   ----     ---------
Total                     917 (not to exceed Total Maximum Available = 2100)

Power Measurement    Inline Power (-50V)
(in Watts)             (+/- 50Watts)
------------------   -------------------
PS1                          50
PS2                           0
------------------   -------------------
Total                        50

[Reza Sharifi]

Have never done it, but as long as the power supplies are in redundant mode (default) and one power supply can run the system, you should be able to change the power source one at a time.

HTH

[dan.letkeman]

That what I though, as we just switched all of our servers over that way.  But then I read this:

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/hardware/installation/guide/78-14409-08/4500inst/01intro.html

"The 4200 W AC power supply should not be used in mixed-voltage configurations. All the inputs in a chassis must be the same voltage (110 or 220 V)."

[Reza Sharifi]

If I am reading this correctly, it is referring to two different input on the same power supply.

But if you have 2 PSUs. You disconnect all 110 inputs on one PSU and connect all 220 inputs and than do the other PSU.

HTH

[dan.letkeman]

Yes, my plan is to disconnect all 110 inputs on one PSU and then connect 220 inputs.  Turn it back on and then do the same to the other one.

^ This is what I would expect to work, but according to my previous post and the documentation.  It is stating that all inputs in a chassis must be the same voltage.

That is why I am concerned now.

[dan.letkeman]

Ok, now I just found this:

http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-4500-series-switches/q-and-a-c67-732778.html

The last Q & A states that I can do the above switch over.

That's confusing!

[Reza Sharifi]

It is confusing!!

I think its a typo in the first document, but just to be sure do it in a maintenance window.

HTH