Name
MRTG — http://www.mrtg.org
Platforms
Most Unix platforms, Windows NT
Pros
Free, easy to set up and use, very well documented. In addition to polling devices on your network, MRTG can receive input from non-SNMP sources.
Cons
Have to install multiple packages, which may be difficult to do on some platforms. For example, MRTG needs a specific SNMP Perl module to perform all of its polling duties. Not very scalable.
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