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Community Member

High temperature on N7K-M224XP-23L nexus module

    Hi ,

We have two nexus switches working as the core of our network , we are facing a high temperature on both of them on the  N7K-M224XP-23L  module slot 3 . Eventhough  we have the same module on slot 6 & 7 but we dont have this warning on them , the only different is that we are using the module on slot 3 for fiber connectivity but we are not using the modules on slot 6 & 7 for any thing yet .The cooling is fine in the data center and only this type of module on this slot is having a high temperature warnings . Please did any one face this problem before ?

Temperature:

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

Module   Sensor        MajorThresh   MinorThres   CurTemp     Status

                       (Celsius)     (Celsius)    (Celsius)

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

3        MAC0Sn0(s2)     115             105         44         Ok

3        MAC0Sn1(s3)     115             105         45         Ok

3        MAC0-Buf0(s4)   115             105         53         Ok

3        MAC0-Buf1(s5)   115             105         62         Ok

3        MAC0-Buf2(s6)   115             105         70         Ok

3        MAC0-Buf3(s7)   115             105         69         Ok

3        MAC1Sn0(s8)     115             105         36         Ok

3        MAC1Sn1(s9)     115             105         39         Ok

3        MAC1-Buf0(s10)  115             105         40         Ok

3        MAC1-Buf1(s11)  115             105         57         Ok

3        MAC1-Buf2(s12)  115             105         47         Ok

3        MAC1-Buf3(s13)  115             105         40         Ok

3        Fwd0Sn0(s14)    115             105         103        Ok

3        Fwd0Sn1(s15)    115             105         103        Ok

3        Fwd1Sn0(s16)    115             105         84         Ok

3        Fwd1Sn1(s17)    115             105         84         Ok

3        Fwd2Sn0(s18)    115             105         94         Ok

3        Fwd2Sn1(s19)    115             105         94         Ok

3        Fwd3Sn0(s20)    115             105         61         Ok

3        Fwd3Sn1(s21)    115             105         61         Ok

3        QEng0Sn0(s22)   115             105         99         Ok

3        QEng0Sn1(s23)   115             105         99         Ok

3        QEng1Sn0(s24)   115             105         91         Ok

3        QEng1Sn1(s25)   115             105         91         Ok

3        QEng2Sn0(s26)   115             105         83         Ok

3        QEng2Sn1(s27)   115             105         83         Ok

3        QEng3Sn0(s28)   115             105         69         Ok

3        QEng3Sn1(s29)   115             105         69         Ok

3        Crossbar(s30)   115             105         52         Ok

    

Mod  Ports  Module-Type                         Model              Status

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

1    0      Supervisor module-2                 N7K-SUP2           active *

2    0      Supervisor module-2                 N7K-SUP2           ha-standby

3    24     10 Gbps Ethernet Module             N7K-M224XP-23L     ok

4    48     10/100/1000 Mbps Ethernet XL Module N7K-M148GT-11L     ok

5    48     10/100/1000 Mbps Ethernet XL Module N7K-M148GT-11L     ok

6    24     10 Gbps Ethernet Module             N7K-M224XP-23L     ok

7    24     10 Gbps Ethernet Module             N7K-M224XP-23L     ok

Hardware

  cisco Nexus7000 C7009 (9 Slot) Chassis ("Supervisor module-2")

  Intel(R) Xeon(R) CPU         with 12225160 kB of memory.

  Processor Board ID JAF1646ALCH

   

Software

  BIOS:      version 2.8.0

  kickstart: version 6.1(2)

  system:    version 6.1(2)

  BIOS compile time:       06/09/12

  kickstart image file is: bootflash:///n7000-s2-kickstart.6.1.2.bin

  kickstart compile time:  12/25/2020 12:00:00 [10/26/2012 07:38:27]

  system image file is:    bootflash:///n7000-s2-dk9.6.1.2.bin

  system compile time:     9/7/2012 13:00:00 [10/26/2012 08:44:25]

2 ACCEPTED SOLUTIONS

Accepted Solutions

High temperature on N7K-M224XP-23L nexus module

I would not take temperature within your data centre as the only measure.

It depends on what other switches and devices are next to your Nexus racks and how the air flow works.

Air flow on the N7K9s are side-to-side:

http://www.cisco.com/en/US/docs/switches/datacenter/hw/nexus7000/installation/guide/n7k_sys_specs.html#wp1039703

The same guide also makes recommendations as to how the switches should be mounted within the rack in order to allow for sufficient clearance.

I have seen a data centre where there were a number of N7Ks in the same row. So in effect hot air was being blown out of one switch and being sucked into the next.

Don't forget to rate all posts that are helpful.

Cisco Employee

Re: High temperature on N7K-M224XP-23L nexus module

Moahmmed,

Kindly check if there is any airblocking the module which is seeing high temperature issue.....

We have seen that airflow getting block to specific module i nthe data center the way they have been placed or someone just put somthing in front of it whic avoid the airflow.

Regards

Inayath

7 REPLIES
Community Member

High temperature on N7K-M224XP-23L nexus module

I forgot to post also that we have changed these modules with new ones but still the problem is appearing on slot 3 !!

High temperature on N7K-M224XP-23L nexus module

I would not take temperature within your data centre as the only measure.

It depends on what other switches and devices are next to your Nexus racks and how the air flow works.

Air flow on the N7K9s are side-to-side:

http://www.cisco.com/en/US/docs/switches/datacenter/hw/nexus7000/installation/guide/n7k_sys_specs.html#wp1039703

The same guide also makes recommendations as to how the switches should be mounted within the rack in order to allow for sufficient clearance.

I have seen a data centre where there were a number of N7Ks in the same row. So in effect hot air was being blown out of one switch and being sucked into the next.

Don't forget to rate all posts that are helpful.

Community Member

Re: High temperature on N7K-M224XP-23L nexus module

I agree with your recommendations but the strange thing is why it is happening only on slot3 and it is not showing on the rest of the slots !! If you see for example the temperature in slot 4 it seems fine

SWI700902# sh environment temperature module 4

Temperature:

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

Module   Sensor        MajorThresh   MinorThres   CurTemp     Status

                       (Celsius)     (Celsius)    (Celsius)

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

4        CPU     (s4)    115             95          47         Ok

4        Crossbar(s5)    105             95          49         Ok

4        CTSdev4 (s9)    115             105         61         Ok

4        CTSdev5 (s10)   115             105         60         Ok

4        CTSdev7 (s12)   115             105         57         Ok

4        CTSdev9 (s14)   115             105         54         Ok

4        CTSdev10(s15)   115             105         54         Ok

4        CTSdev11(s16)   115             105         50         Ok

4        CTSdev12(s17)   115             105         50         Ok

4        QEng1Sn1(s18)   115             105         55         Ok

4        QEng1Sn2(s19)   115             105         54         Ok

4        QEng1Sn3(s20)   115             105         52         Ok

4        QEng1Sn4(s21)   115             105         52         Ok

4        L2Lookup(s22)   120             110         53         Ok

4        L3Lookup(s23)   120             110         58         Ok

Cisco Employee

Re: High temperature on N7K-M224XP-23L nexus module

Moahmmed,

Kindly check if there is any airblocking the module which is seeing high temperature issue.....

We have seen that airflow getting block to specific module i nthe data center the way they have been placed or someone just put somthing in front of it whic avoid the airflow.

Regards

Inayath

Community Member

Re: High temperature on N7K-M224XP-23L nexus module

Actually our nexus switches are mounted in server racks which means that the switch side and the server side are very close and according to cisco recommendations i think we need to keep some space in this area . Do you agree with me ?

Cisco Employee

Re: High temperature on N7K-M224XP-23L nexus module

There you go. Yes totally agree with you.

HTH

REgards

Inayath

*Plz rate all usefull posts /.

High temperature on N7K-M224XP-23L nexus module

Have a look at the Cisco power calculator for the N7K at http://tools.cisco.com/cpc/

You will find that the N7K-M224XP-23L generates twice the heat and consumes twice the power of the N7K-M148GT-11L.

This will help to explain why this blade is so hot in comparison to the others.

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