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Cisco SD-WAN
Product Documentation
Viptela Documentation

Network Optimization Overview

The Viptela network optimization solution includes the following:

  • CloudExpress Service
  • TCP Optimization

CloudExpress Service

Enterprise software providers deliver many applications as Software as a Service (SaaS) cloud applications, such as Dropbox, Microsoft Office365, and Salesforce. Latency and packet loss impact the performance of these applications, but in legacy networks, network administrators have little visibility into network characteristics between end users and SaaS applications. When a path is impaired in a legacy network, the manual process of shifting application traffic to an alternate path is complex, time consuming, and error prone.

CloudExpress service addresses these issues by optimizing performance for SaaS applications in the Viptela overlay network. From a central dashboard, CloudExpress service provides clear visibility into the performance of individual cloud applications and automatically chooses the best path for each one. It responds to changes in network performance in real-time, intelligently re-routing cloud application traffic onto the best available path.

CloudExpress service calculates a value called the Viptela Quality of Experience (vQoE). The vQoE value weighs loss and latency using a formula customized for each application. For example, email applications tolerate latency better than video applications, and video applications tolerate loss better than email applications. The vQoE value ranges from zero to ten, with zero being the worst quality and ten being the best. CloudExpress service computes vQoE values for applications and paths, then assigns applications to the paths that best match their vQoE value. CloudExpress service periodically recalculates vQoE values for paths to ensure ongoing optimal application performance.

TCP Optimization

TCP optimization fine-tunes the processing of TCP data traffic to decrease round-trip latency and improve throughput. You can optimize TCP traffic in service-side VPNs on vEdge routers. Optimizing TCP traffic is especially useful for improving TCP traffic performance on long-latency links, such as transcontinental links and the high-latency transport links used by VSAT satellite communications systems. TCP optimization can also improve the performance of SaaS applications.

Additional Information

Using CloudExpress Service

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