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ac89live's avatar
ac89live
Icon for Altocumulus rankAltocumulus
Jan 09, 2023

GTM marking data virtual server down after establishing sync group

Hi We have two GTM-Virtual in sync group in two different data centers If we disable the group sync, all virtual servers will be marked UP But if we establish sync between them, they'll be marked ...
security
Nikoolayy1's avatar
Nikoolayy1
Icon for MVP rankMVP
Jan 09, 2023

The workaround is really easy. Just configure a prober pool that has the GTM(DNS) that haves access to the F5 LTM devices:

https://techdocs.f5.com/kb/en-us/products/big-ip_gtm/manuals/product/gtm-implementations-11-5-0/15.html

https://support.f5.com/csp/article/K08433560

 

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BIG-IP Global Traffic Manager (GTM) performs intelligent probing of your network resources to determine whether the resources are up or down. In some circumstances, for example, if your network contains firewalls, you might want to set up device-specific probing to specify which BIG-IP systems probe specific servers for health and performance data.

 

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Also you may enable debug to better see which DNS device marks the VS as down:

https://support.f5.com/csp/article/K19451442