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Elvis_Chong_343's avatar
Elvis_Chong_343
Icon for Nimbostratus rankNimbostratus
May 24, 2018

Host health monitor with UDP + ICMP

Hi F5 expert,

 

I have previously used to monitor 1 of the host with the UDP port, however if the server goes offline, F5 still mark the host up. Upon checking, I found UDP monitor operation can't detect the host goes offline but only detect the host service port availability. https://support.f5.com/csp/article/K6143

 

I am thinking to add the monitoring from UDP conjunction with ICMP monitor. But i puzzled with multiple monitoring, if i have 2 monitoring added to monitor the host. F5 will mark the host down either 1 of the monitoring failed or it will only mark the host down when both of the monitoring failed?

 

application delivery
BIG-IP
LTM

1 Reply

  • Samir_Jha_52506's avatar
    Samir_Jha_52506
    Icon for Noctilucent rankNoctilucent
    May 25, 2018

    As per above case, I would recommend you to add two monitor in pool to check the pool status. While adding monitor to pool, Go go to advance setting(

    Configuration
    ) and apply minimum 2 Monitors.

    It will check both monitor. if any one fails, LB will make pool member down. Hope it will help you..