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Dan_Pacheco's avatar
Dan_Pacheco
Icon for Cirrus rankCirrus
Nov 17, 2017

In an HA pair, which device sends monitor traffic?

HA pair setup with fast failover, aka ha-group running v12.1.2 hf1. Single traffic group.

 

I expected both the active and standby LTM devices to send monitor traffic to nodes but when I tcpdump on both devices I see health check traffic sourcing only from the active device. Thinking it was an issue with that ha pair I checked a different ha pair and saw the same thing. So I am looking for confirmation....

 

Which device sends monitoring traffic, active, standby or both?

 

application delivery
LTM

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  • Lee_Sutcliffe's avatar
    Lee_Sutcliffe
    Icon for Nacreous rankNacreous
    Nov 17, 2017

    Both devices should be sending monitors, this is required so that the standby device can go active and start serving traffic.

     

    Is your configuration synchronised and can you ping/curl the pool members from each device out of the equivalent network?