Prober Pools in GTM

you can find the information covered well here: https://support.f5.com/kb/en-us/products/big-ip_gtm/manuals/product/gtm-concepts-11-3-0/4.html

Here is how I use them: I have three datacenters, three gtm(one in each DC), and three prober pools(one for each data center). The prober pools include all three GTM, in each of the dcs, and are set to use Global availability. In the Prober Pool, the Local data center GTM is listed as the first prober.

Primarily, this was done to have deterministic probing. I don't like not knowing where a monitor might be sourced from. So when all is healthy, the objects that need to be monitored by the GTM, are monitored by the GTM within that data center. Until it fails, and one of the other GTM will pick it up. This creates prober redundancy, and maintains the deterministic nature of the architecture. This is just one scenario,.. There are many ways to use Prober Pools.

Hope it helps! Good Luck!

David