Prober Pools in GTM

I suggest you read through this GTM doc : https://support.f5.com/kb/en-us/products/big-ip_gtm/manuals/product/gtm-concepts-11-5-0/4.html In a nutshell, they are pool of F5 devices that will monitor VS for availability. You decide who probes what and where if you have preference for specific DC or devices (called Servers in GTM configuration). Salim