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Fozail_183609's avatar
Fozail_183609
Icon for Nimbostratus rankNimbostratus
Jan 02, 2018

BIG-IP DNS monitor

I am little bit confused regarding BIG-IP DNS monitor:-

 

Let's assume that I have two conditions:-

 

Condition 1:-

 

While adding BIG-IP LTM, disabled auto-discovery. Added virtual server manually and called a monitor (HTTP), to monitor the status of VIP of BIG-IP LTM. what does exactly take place in this situation (gtmd, big3d communication would come into picture or not?

 

Condition 2:-

 

While adding BIG-IP LTM, enabled auto-discovery but no monitor has been associated with auto discovered virtual server. At what frequency BIG-IP LTM would update BIG-IP DNS regarding the status of VIP? will there be any probe sent out by BIG-IP DNS?

 

Please suggest

 

application delivery
BIG-IP DNS
security
  • crodriguez's avatar
    crodriguez
    Ret. Employee
    Jan 02, 2018

    I'm simplifying here a bit, but in general, it is best to let BIG-IP LTM monitor its resources and then use iQuery to communicate virtual server status to BIG-IP DNS systems. It does not matter if you add the virtual server to the BIG-IP DNS system manually or using auto discovery. If the virtual server is being monitored on the BIG-IP LTM system (through its pool members), then it is not necessary to have additional monitors defined on the virtual server on BIG-IP DNS - especially if the monitor tests are essentially the same on both BIG-IP DNS and BIG-IP LTM, such as might be the case with an HTTP monitor.