MRTG snmp device grapher under Alpine userspace
The Multi Router Traffic Grapher (MRTG) is a tool to monitor the traffic load on network links. MRTG generates HTML pages containing PNG images which provide a LIVE visual representation of this traffic. Check http://www.stat.ee.ethz.ch/mrtg/ to see what it does.
Go to http://oss.oetiker.ch/mrtg for all the details about mrtg.