Catalyst 4948 Power Error message

[nfoxnfoxn]

Hello all

Very glad to join you here

We are running a small network business and as funs of ciscos we own a some of the 4948s.

We are facing an issue with couple of them as we get the below error message

C4K_CHASSIS-3-INSUFFICIENTPOWERSUPPLIESDETECTED:Insufficient power

supplies present for specified configuration

First thought to replace the power supply didn't actually work as we did that with no result.

Power consumption is not an issue as well because all other 4948s work fine with 1 power supply (forgot to mention is 1 power supply in all of them).

Please has any of you faced the above issue?

Any help would be very useful..!

Thank you

[glen.grant]

   Are you running phones or AP's on this device ?   Do  a show power inline and see whats available and what is being used.

[nfoxnfoxn]

Hello there

And really sorry for the late reply ... merry christmas as well

Actually we are running linux servers on the switch but command's output gives null to me like:

Interface Admin  Oper            Power(Watts)     Device              Class
                            From PS    To Device                   
--------- ------ ---------- ---------- ---------- ------------------- -----

--------- ------ ---------- ---------- ---------- ------------------- -----

Totals:          0    on    0.0        0.0

Same output I get with other 4948s without the insufficient power .... message.

Why you think is this an issue?

Thanks

[sdheer]

Hi Nelos,

In order to further look into the issue kindly give the following outputs:

>> sh ver

>> sh power

>> sh log

Regards,

Swati

[francisco_1]

what exact model is the switch?

The message indicate "The system software detected that the current chassis configuration has fewer power supplies than required for the existing configuration"

Recommended Action    "Add a power supply to meet the needs of the current chassis configuration"

issue "show power"

According to the datasheet the 4948 platform does come with a dual redundant power supplies. You mentioned there is only 1 power supply? so the that part for the power supply is PWR-C49-300AC but also you could purchase a redundant power supply also to have enough power. The part number is "PWR-C49-300DC/2"

Francisco

[nfoxnfoxn]

Hello again and thank u all for your replies

Current model of the PS is the PWR-C49-300 DC and the consumption is lower than the one provided. We have somemore 4948s with the same consumption but with no error messages.

Power                                             Fan      Inline
Supply  Model No          Type       Status       Sensor   Status
------  ----------------  ---------  -----------  -------  -------
PS1     PWR-C49-300DC     DC 300W    good         good     n.a.  
PS2     none              --         --           --       --   

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

Power Summary                      Maximum
(in Watts)              Used     Available
----------------------   ----     ---------
System Power (12V)        200         300
Inline Power (-50V)         0           0
Backplane Power (3.3V)      0           0
----------------------   ----     ---------
Total                     200         300

The sh log is full of the messages discused..

I' ve checked the docs as well but I was wondering if this is a software bug. What do u think of that?

Thank u veru much again

[Sergio Maciujec]

The 4948 is based on the 4500 series and it has two power power management modes:

1. Redundant mode—Redundant mode uses one power  supply as a primary power supply and the second power supply as a  back-up. If the primary power supply fails, the second power supply  immediately supports the switch without any disruption in the network.  Both power supplies must be the same wattage. A single power supply must  have enough power to support the switch configuration.

2. Combined mode—Combined mode uses the power from  all installed power supplies to support the switch configuration power  requirements. However, combined mode has no power redundancy. If a power  supply fails, one or more modules might shut down.

If you do a show run you will probably have "power redundancy-mode combined" on there.

So basically do this:

conf t

power redundancy-mode redundant

and this will make your error go away.

http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/25ew/configuration/guide/pwr_envr.html#wp1035503