Onesixtyone 0.2 is an efficient SNMP scanner which utilizes a sweep technique to achieve good performance. It finds SNMP devices on your network and brute-forces the community strings using a dictionary. It is possible to scan a class B network (65536 ip addresses) in under 13 seconds with a high degree of accuracy.
You can download it from the following link: https://packetstormsecurity.com/files/download/25854/onesixtyone-0.2.tar.gz
Source: https://packetstormsecurity.com/files/25854/onesixtyone-0.2.tar.gz.html