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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
shaggy's avatar
shaggy
Icon for Nimbostratus rankNimbostratus
Jul 08, 2014

You generally want all GTMs communicating with each other and all LTMs (not just local) via iquery. The GTM will delegate monitoring of virtual servers to the device that it thinks is best - in the case of virtual servers, it will delegate monitoring to the LTM on which they are configured.

 

http://support.f5.com/kb/en-us/products/big-ip_gtm/manuals/product/gtm-implementations-11-4-0/1.html

 

From my experience, it is best to allow all GTMs to talk to all LTMs in order to have resilient monitoring. If my GTM in DC1 fails, I don't necessarily want all applications to fail to DC2.