Good Gear Guide
Seven secret weapons for network management on a b...
No list of FOSS network management tools would be complete without Wireshark. For the IT shops that can't afford dedicated hardware-based protocol analyzers or RMON probes for the organization's many network segments, it's a must-have. Many of us know how great Wireshark is and the vast number of protocols that it supports. Wireshark can even monitor the Virtual Switch Link (VSL) header (VSH) communications on a Cisco Virtual Switching System (VSS). It also has full IPv6 capabilities.
Seven secret weapons for network management on a budget