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Forum Discussion

Andy_McGrath's avatar
Andy_McGrath
Icon for Cumulonimbus rankCumulonimbus
Jul 08, 2014

GTM Sync Group, sharing state information

Have a design where two GTMs are located in two different data centres and configured in a Sync Group. Then each Data Centre has a single LTM (currently in Pre-Production, production will have a HA p...
availability
BIG-IP DNS
design
Andy_McGrath's avatar
Andy_McGrath
Icon for Cumulonimbus rankCumulonimbus
Jul 09, 2014

Talked to F5 Support and confirmed this is by design.

 

The LTMs send (F5 Support said "broadcasts") status/monitor updates to all GTMs via iQuery, if the iQuery connection fails or is missing for the bigip monitor timeout period then the GTM will mark the LTM (server) down and all associated Virtual Servers.

 

Shaggy is correct you can use other monitoring for the Virtual Servers which can be delegated to another F5.

 

Not how I originally understood GTM sync group bigip monitor communication to work but I have been educated :)