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jkramer9's avatar
jkramer9
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Apr 06, 2020

Default Health Monitor - GSLB

Hi all,   I have a scenario and would like to get some input on it.   Configuration: FQDN 1 GSLB Pool 2 Pool Members Load Balancing Method - Global Availability Both Pool Members are Ena...
application delivery
BIG-IP DNS
Simon_Blakely's avatar
Simon_Blakely
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Apr 07, 2020

The bigip server monitor for LTMs reports the status of the LTM virtual server to the GTM via iQuery.

When the LTM pool members go down due to failing monitors, the status of the virtual server changes on the LTM, and the GTM is alerted via iQuery.

 

Other GTM monitors probing the GTM pools are in addition to the server object level bigip monitor.

jkramer9's avatar
jkramer9
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Apr 09, 2020

Thanks, this is what I originally suspected.

 

I tried searching around and couldn't find an answer which explains how the bigip server monitor functions. Does the GTM simply do a ping request to the LTM Virtual Servers every 30 seconds to check availability status and is the hold down timer 90 seconds before it's marked as Down?