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Dazzla_20011's avatar
Dazzla_20011
Icon for Nimbostratus rankNimbostratus
Nov 30, 2012

GTMs Reporting Time difference between themselves

Hi,

 

One of our GTMs has the following log entries.

 

Time difference between GTM f5-gtm1 and me is 77 seconds -- Make sure NTP is running and GTM times are in sync

 

NTP is configured but how can I check its functioning, has anyone else seen this problem and come across any fixes?

 

Thanks

 

 

 

 

config
design

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  • What_Lies_Bene1's avatar
    What_Lies_Bene1
    Icon for Cirrostratus rankCirrostratus
    Nov 30, 2012

    There's a couple of things you can do;

     

     

    1) Use tcpdump

     

    2) Use ntpq, then command associations, check 'reach' is yes, use the peers command to check your servers etc. etc.

     

  • Dazzla_20011's avatar
    Dazzla_20011
    Icon for Nimbostratus rankNimbostratus
    Nov 30, 2012
    Think I will try restarting the ntpq service, any potential impact when doing this? Also will the BIG-IP use the management interface or TMM interface to communicate with the NTP servers.
  • What_Lies_Bene1's avatar
    What_Lies_Bene1
    Icon for Cirrostratus rankCirrostratus
    Nov 30, 2012
    The service is ntpd (the tool is ntpq). I don't believe it'll have an affect but I'm not too familiar with GTM so couldn't say for sure. The interface used will depend on the routing you have setup. If you don't want it going out the management interface you'll need to setup a specific static route to use whatever interface is required.