This chapter provided a thorough overview of Cisco intelligent path control, which is a core pillar of the Cisco IWAN architecture and is based upon Performance Routing (PfR). The following chapters will expand upon these theories while explaining the configuration of PfR.
PfR provides the following benefits for a WAN architecture:
Maximizes WAN bandwidth utilization
Protects applications from performance degradation
Uses passive monitoring to track application performance across the WAN
Enables the Internet as a viable WAN transport
Provides multisite coordination to simplify network-wide provisioning
Provides an application-based policy-driven framework that is tightly integrated with existing Performance Monitor components
Provides a smart and scalable multisite solution to enforce application SLAs while optimizing network resource utilization
PfRv3 is the third-generation multisite-aware bandwidth and path control/optimization solution for WAN- and cloud-based applications and is available now on Cisco Integrated Services Router (ISR) Generation 2 series, ISR-4000 Series, and CSR 1000V and ASR 1000 Series routers.