onesixtyone 0.3 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 minutes with a high degree of accuracy. Tested on Linux, FreeBSD, OpenBSD and Solaris.
You can download it from the following link: https://packetstormsecurity.com/files/download/25900/onesixtyone-0.3.tar.gz
Source: https://packetstormsecurity.com/files/25900/onesixtyone-0.3.tar.gz.html