SAA and RTTMON:
The SAA and RTTMON MIB are Cisco IOS software features available in versions 12.0 (5)T and higher. These features enable you to test and collect delay, jitter, and packet loss statistics on the data network. Internetwork Performance Monitor (IPM) is a Cisco network management application that can configure the features and monitor the SAA and RTTMON data. The SAA and RTTMON features can be used to measure delay, jitter, and packet loss by deploying small Cisco IOS routers as agents to simulate customer end stations. The routers are referred to as delay and jitter probes. Additionally, the delay and jitter probes can be configured with the remote monitoring (RMON) alarm and event triggers once baseline values have been determined. This allows the delay and jitter probes to monitor the network for predetermined delay and jitter service levels and alert network management system (NMS) stations when a threshold is exceeded.
This URL should help you:
http://www.cisco.com/en/US/tech/tk869/tk769/technologies_white_paper09186a00801b1a1e.shtml#topic1
