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2funky_105078's avatar
2funky_105078
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Apr 22, 2014
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GTM: avoiding flapping DNS answers with RTT method

I am in the need to understand how GTM metrics work for GTM LDNS probes.   1) how they can be logged the decision? I am using 11.2 but moving fast to 11.4.1.. :)   2) Lets make an example. if...
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  • Cory_50405's avatar
    Cory_50405
    Apr 23, 2014

    The only solution I could see in your situation is to break your single pool into three pools, and either stick with RTT and enable persistence at the wide IP, or switch to topology. Either one should get you some more consistency.

     

2funky_105078's avatar
2funky_105078
Icon for Cirrus rankCirrus
Apr 23, 2014

Thanks Cory.

 

Can topologic based load balancing work in conjunction with RTT, or it is either one or the other way?

 

Can we use standard RTT and "correct" the anomaly values with the information coming from the topology?

 

For exmaple, if we get `back USA DC VIP for 100 times and for just 1 time we get Australia VIP because the RTT came lower there just one time, then can we ask GTM to have a look also at topology based info to check if it really needs to flap to another DC VIP?