下記CLIコマンドにて確認可能です。
> debug user-id dump probing-stats
[表示例]
> debug user-id dump probing-stats
vsys: vsys1
num initial probing running : 0
num initial probing to be finished : 0
periodic probing running : no
last round of probing : 70 secs ago(took 0 secs)
next round of probing : In 110 secs
num of IPs probed in last round : 0
periodic probe starter jobid : 0
num periodic probing running : 0
num periodic probing to be finished : 0
num of initial probe made : 2710
num of initial probe succeeded : 6
num of initial probe failed : 2704
num of periodic probe made : 16
num of periodic probe succeeded : 16
num of periodic probe failed : 0