Cacti is a complete network graphing solution designed to harness the power of RRDTool's data storage and graphing functionality. It 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 thousands of devices.

The primary features of Cacti include:

Unlimited graph items
Auto-padding support for graphs
Graph data manipulation
Flexible data sources
Data gathering on a non-standard timespan
Custom data-gathering scripts
Built-in SNMP support
Graph templates
Data source templates
Device templates
Tree, list, and preview views of graph data
User and user group based management and security
Remote data collection
Graph aggregation
Device, graph and tree automation
Network discovery

Graph sequencing can also be accomplished through the application, allowing you to create a custom monitoring zone for easy viewing.

Cacti has built-in SNMP support, and it uses a combination of php-snmp, ucd-snmp and net-snmp to gather your network device information.