Virtualized Networks: What About Performance Assurance?

Posted by Mae Kowalke on Tuesday, October 10, 2017 with No comments

Around the globe, pretty much every telecom service provider is either running a network functions virtualization (NFV) proof-of-concept, or has already virtualized some areas of their network. In doing so, a major concern they have is how to effectively perform test and measurement (T&M) of these dynamic network environments which, if not properly assured, threaten carriers’ main competitive advantage: network reliability. Here, Accedian’s VP of International Sales, David Dial, explains what it takes to fully assure virtual networks, and how our solutions uniquely address this need.

What’s required to fully assure performance and user experience in a virtualized environment?

DD: Network performance assurance for virtualized networks goes far beyond traditional T&M. Essentially, what’s needed is an advanced operations support system (OSS) designed for an IP world, capable of providing real-time performance information at a very granular level to meet the challenges of quality of service (QoS) assurance in complex network environments.

That’s what Accedian provides in our software-based SkyLIGHT solution that covers Layer 2 and Layer 3 performance monitoring, service activation testing (SAT), bandwidth utilization monitoring, and distributed packet capture information—unified in a single platform for multi-service network environments.

How does the convergence of mobile and fixed networks affect performance assurance?
DD: As networks converge to serve wireless, business, and residential customers—and performance parameters for IP-based services become less tolerant of faults—QoS assurance is becoming increasingly challenging. It’s not viable to continue spending significant CapEx and OpEx for costly handheld test gear to attempt identifying network issues during scheduled maintenance windows. Nor is it cost-effective to continued placing hardware in a network that is increasingly more distributed and multi-vendor.

The pressure on service providers to provide a high quality customer experience is growing, and network quality is becoming a differentiator in ‘quality wars’ heating up around the globe, as well as a requirement to realize objectives for costly LTE investments.

The use of NFV need not be synonymous with loss of quality management. Accedian’s virtualized performance monitoring and assurance solution is typically placed in a service provider’s data center environment to provide microsecond-accuracy for TWAMP sessions created for different classes of service as well as different packet sizes. Further enhancing this setup, our “smart SFP” modules can originate test sessions in a distributed fashion and support a full or partial mesh quality testing environment depending on the operator’s QoS requirements.

The SkyLIGHT solution is deployed at scale by major Tier 1 operators globally, with several of them planning to move to a completely virtualized version of the platform.

What else makes Accedian’s approach to virtualized performance assurance unique?
DD: In head-to-head competition with traditional handheld test sets, as well as hardware-based solutions, SkyLIGHT has been proven by major Tier 1 operators to be superior in multi-service, NFV network environments—no degradation in performance metric accuracy!

In short, SkyLIGHT provides real-time network state visibility for NFV environments. It serves as the virtualized instrumentation feedback loop required for software defined-networking (SDN) control and NFV orchestration based on OSS policy.