file configures how the standard CUPS network backends (http, https, ipp, ipps, lpd, snmp, and socket) access printer information using SNMPv1 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 Community and DebugLevel directives are used by all backends. The remainder apply only to the SNMP backend -
Specifies one or more device URIs that should be used for a given make and model string.
The regular expression is used to match the detected make and model, and the device URI strings must be of the form "scheme://%s[:port]/[path]", where "%s" represents the detected address or hostname.
There are no default device URI matching rules.
Specifies whether the addresses of printers should be converted to hostnames or left as numeric IP addresses.
The default is "off".
Specifies the maximum number of seconds that the SNMP backend will scan the
network for printers.
The default is 120 seconds (2 minutes).