Cisco IOS and SNMP show wrong Power Supply information

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Feb 12th, 2010
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Hello,


We had a power supply failure and the switch is now powered through a RPS.

Anyhow, we are monitoring the switch with a Nagios plugin (check_snmp_env) which uses SNMP to check the status of the power supplies.


The plugin says, everything is alright. A manual snmp check says the same (power supply status 1; ok). Ios itself shows "Bad" but where does it get this info? From SNMP? Is this a bug in SNMP/ios? I find it very strange that there is no measure which shows a power supply failure.


Hardware: Catalyst 3750-E /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif";} (Stacked)

Full model name: WS-C3750E-48TD

IOS Version: Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(37)SE1, RELEASE SOFTWARE (fc1) /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif";}


Output of sh env:


/* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif";} gvanswdc-01# show env all
FAN is OKshow
TEMPERATURE is OK
Temperature Value: 39 Degree Celsius
Temperature State: GREEN
Yellow Threshold : 49 Degree Celsius
Red Threshold    : 59 Degree Celsius
SW  PID                 Serial#     Status           Sys Pwr  PoE Pwr  Watts
--  ------------------  ----------  ---------------  -------  -------  -----
1  C3K-PWR-265WAC      DTN1138C0T1  OK              Good     N/A      265/0
2  C3K-PWR-265WAC      DTN1138C0TA  OK              Bad      N/A      265/0


SW  Status          RPS Name          RPS Serial#  RPS Port#
--  -------------   ----------------  -----------  ---------
1   Active          CiscoRPS          CAT1142VGG1  1
2   Active          CiscoRPS          CAT1142VGG1  2


RPS Name: CiscoRPS       
  State: Active
  PID:
  Serial#: CAT1142VGG1
  Fan: Good           
  Temperature: Green        


  RPS Power Supply A: Present
    PID             : C3K-PWR-750WAC   
    Serial#         : DTN1137E0L1
    System Power    : Good
    PoE Power       : Good
    Watts           : 300/450 (System/PoE)


  RPS Power Supply B: Present
    PID             : C3K-PWR-750WAC   
    Serial#         : DTN1137E0EK
    System Power    : Good
    PoE Power       : Good
    Watts           : 300/450 (System/PoE)




SNMP Output:


snmpwalk -v 2c -c public 172.16.16.239 1.3.6.1.4.1.9.9.13.1.5
SNMPv2-SMI::enterprises.9.9.13.1.5.1.2.1059 = STRING: "Sw1, PS1 Normal, RPS NotExist"
SNMPv2-SMI::enterprises.9.9.13.1.5.1.2.2060 = STRING: "Sw2, PS1 Normal, RPS NotExist"
SNMPv2-SMI::enterprises.9.9.13.1.5.1.3.1059 = INTEGER: 1
SNMPv2-SMI::enterprises.9.9.13.1.5.1.3.2060 = INTEGER: 1
SNMPv2-SMI::enterprises.9.9.13.1.5.1.4.1059 = INTEGER: 2
SNMPv2-SMI::enterprises.9.9.13.1.5.1.4.2060 = INTEGER: 2



Thanks for any help or ideas.

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Joe Clarke Fri, 02/12/2010 - 13:29
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You are seeing CSCsk08029.  But, you could also be affected by CSCsq77660.  The fix for both is to move to 12.2(46)SE or higher.

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