MRTG is one of those tools a Network Engineer has on his/her toolbelt. MRTG allows the graphing of trending network activity for a wide range of devices. It uses SNMP to query a host and poll it’s network information and statistics. It can be used with Routers, Switches, Linux Hosts, etc.
I’m going to run MRTG against a Linux Router(running IPtables), a HP PowerConnect Switch, a Cisco Router, and an ESXi host. Anyway….Let’s get started.