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New Member

high cpu in Dyn DNS client

Dear

We have very high cpu usage in cisco router 2821 which is casued by dyn DNS client service (consumed about 97%)

what do you suggest to reslove this issue identify why it happens

Thanks

Abdul Elah Al Tayeb

2 REPLIES
Cisco Employee

Re: high cpu in Dyn DNS client

Hey Abdul,

Can you post a 'show tech' from this device along with 'show stack 51'?  This problem can sometimes be caused if 'update dns' is configured and the server is updating at a more frequent pace than the client has requested.  In some instances, configuring the following can eliminate the problem -

no ip dhcp update dns

This may require a reload after the command is configured to clear the condition.  Thanks.

Brandon

New Member

Re: high cpu in Dyn DNS client

Thanks for this information and I have used show stack command and it provide me with  below output

This is output :-

      Process 51:  Dyn DNS Client

  Stack segment 0x4399EBA8 - 0x439A0ED0

  FP: 0x439A0C38, RA: 0x413A5D10

  FP: 0x439A0C60, RA: 0x40B24554

  FP: 0x439A0E98, RA: 0x41397304

  FP: 0x439A0EB0, RA: 0x413972E8

What does this imply?

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