This is the home of the opSLA space.
Cisco IP SLA Information
Cisco IP SLA is a fantastic system for generating and reporting on round trip times (RTT), there is a very long history of Cisco IP SLA and the feature has changed names many times, but right now is called Cisco IP SLA. Below are some links which provide more information and background into Cisco IP SLA.
- Cisco IOS IP SLAs Overview - IOS 12.4
- IP SLAs Overview - IOS 15M&T
- Cisco IOS IP Service Level Agreements Q&A