Suppress this event completely:
suppress gen_id 1, sig_id 1852:
Suppress this event from this IP:
suppress gen_id 1, sig_id 1852, track by_src, ip 10.1.1.54
Suppress this event to this CIDR block:
suppress gen_id 1, sig_id 1852, track by_dst, ip 10.1.1.0/24