The snmp.conf file configures the CUPS SNMP printer
discovery backend and is normally located in the /etc/cups
directory. Each line in the file can be a configuration
directive, a blank line, or a comment. Comment lines start with
the # character.
The SNMP backend uses the SNMPv1 protocol to discover network
printers, collecting information from the Host MIB along with
intelligent port probes to determine the correct device URI and
make and model for each printer. Future versions of CUPS will
likely support the new Port Monitor MIB as well.