What constitutes a ‘failed request’ in dispatcher module, in which a gateway is marked inactive?

From documentation –

ds_ping_interval

With this parameter you can define the interval for sending a request to a gateway marked as inactive upon a failed request routing to it.

ds_probing_threshold

If you want to set a gateway into inactive mode, there can be a specific number of failed requests until it will change from "active" to "inactive".

Thanks,

-dan