Useful tools for the WiFi Network
From DD-WRT Wiki
Cacti
Cacti is a complete network graphing solution designed to harness the power of RRDTool's data storage and graphing functionality. Cacti provides a fast poller, advanced graph templating, multiple data acquisition methods, and user management features out of the box. All of this is wrapped in an intuitive, easy to use interface that makes sense for LAN-sized installations up to complex networks with hundreds of devices.
http://www.cacti.net/screenshots.php
Linux - http://www.cacti.net
Windows (Easy installer) http://forums.cacti.net/about14946.html
If you are interested in graphing latency, etc grab this plugin for Cacti. It will allow you to graph latency (ping spikes) against router cpu and bandwidth
http://forums.cacti.net/about10049.html
ManageEngine NEtflow tool
NetFlow Analyzer is a netflow monitoring tool which collects NetFlow packets or other supported flows exported from enterprise routers and switches, generating network traffic reports that help understand the nature of the network traffic and the bandwidth utilization, thus helpful in traffic analysis and bandwidth monitoring. NetFlow monitoring acheives a new level when a solution such as ManageEngine NetFlow Analyzer is aligned to Cisco technologies such as NetFlow, NBAR and CBQoS.
NetFlow monitoring software is not only about monitoring the network traffic but also a tool to help network administrators to troubleshoot faster. The ability to drill down the interfaces and the seeing the traffic, application, source, destination, conversation etc, helps a network administrator to gain an indepth visibility into the network traffic. More use cases on troubleshooting.
Sample reports
http://www.manageengine.com/products/netflow/bandwidth-reports.html
IPERF
Iperf is a commonly used network testing tool that can create TCP and UDP data streams and measure the throughput of a network that is carrying them. Iperf is a modern tool for network performance measurement written in C++.
Iperf allows the user to set various parameters that can be used for testing a network, or alternately for optimizing or tuning a network. Iperf has a client and server functionality, and can measure the throughput between the two ends, either unidirectonally or bi-directionally. It is open source software and runs on various platforms including Linux, Unix and Windows. It is supported by the National Laboratory for Applied Network Research
http://www.noc.ucf.edu/Tools/Iperf/
If you really want to get fancy - consider adding Nagios
Capabilities to monitor applications, services, operating systems, network protocols, system metrics and infrastructure components with a single tool Powerful script APIs allow easy monitoring of in-house and custom applications, services, and systems
You can setup some cool tests - sky is the limit.
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