NIST Net WAN Emulation Software does not work correctly

Unanswered Question
May 2nd, 2007
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Hi everyone,

I downloaded NIST Net WAN Emulation Software below from CCO (

to measure WAAS performance in our lab.


NIST Net ISO, kernel 2.6.9-22. Added support of GigE and other HW. 4.0

And I installed NIST Net WAN Emulation Software into brand new DELL PowerEdge 1950 according to

the following document.

NIST Net WAN Emulation Software Installation and Configuration Note

Installation has finished successfully but NIST Net does not work correctly with the following message

displayed continuously.

fast_rtc: lost around 26 interrupts at 8192Hz


fast_rtc: lost around 0 interrupts at 8192Hz

Why there is a differentiation as 26 or 0 is that it seems to depend select entry on the menu

that displayed by executing "./nistnet" command.

And I have to execute system restart (CNTL + ALT + DEL) to stop the message from being displayed


I can not resolve this problem, so would you please let me know how I can resolve it to get NIST Net

work properly.

Your information would be appreciated.

Best regards,

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mmellet Tue, 05/08/2007 - 05:57
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The only workaround available currently is what you have done " Reloading the Device "

snakayama Tue, 05/08/2007 - 16:54
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Thank you very much for your reply.

I understand it.

Hi snakayama,

I too downloaded the Cisco-NISTnet3-disc1-v4 and extract it into an CD.  But is there any other steps i need to do??

Coz when i boot the CD, it doesn't boot.

Do i need to put certain files into specific location?? Or is there any speical instruction i need to do??

Would appreciated any help on this as i have spent hours on this but it still couldn't boot up.



snakayama Sun, 05/30/2010 - 19:01
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Hi Hunt,

Unfortunately I wouldn't be able to answer your question clearly but I would like you to give the information that might help you.

NIST NET Home Page

How to install the  emulation package, version 2.0.12
(It is for version 2.0.12 not 4.0, however I think the basic procedure might be the same ...)

I hope this information help you.




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