Use of Traffic Emulation in Interoperability Testing Mark

Use of Traffic Emulation in Interoperability Testing Mark Lambe Product Marketing Manager Shenick Network Systems 1 www. shenick. com

Overview Telepresence is the delivery of high performance voice and video which plays a critical role in service differentiation. A clear understanding of quality and performance limitations under a variety of operational conditions, including interoperability, is imperative to success. Today’s discussion covers the benefits of adopting real-time, per end point user emulation and analysis to deliver a highly credible and pragmatic quality test program. 2 www. shenick. com

Define Interoperability means different things to different people at each stage Ø The Telepresence deployment will function correctly i. e. each component in the system can communicate and operate with each other. Ø The Telepresence deployment operates correctly on the proposed infrastructure with minimum disruption. Ø The Telepresence deployment will operate alongside other services (video, voice, data) without impacting Qo. E/Qo. S. Ø The use of different Vendor end-point systems/components. Telepresence has unified the way we communicate Ø Therefore a unified test solution covering all aspects of Interoperability is required. Vendor Interoperability 3 www. shenick. com

System Functionality Emulate the most realistic components, therefore giving the most accurate results Ø A Complete test process - examine performance from end-point boot-up to call ended Performance test configuration/management server responses Ø Ability of end-points to connect to management servers Ø Time to download end-point firmware settings, upgrades, etc Ø Time to register through to time to join calls Participate in real/live Telepresence calls Ø Measure actual video/audio quality Security Testing Ø Attempt registration with un-assigned MAC addresses 4 www. shenick. com

Operational Functionality Preliminary testing Ø Network Performance Connectability – End-points can communicate with management servers – What impact will firewalls have on Telepresence traffic flows coming from unsecure to secure networks Test Telepresence management servers under varying network and load conditions – If a DDo. S attack occurs at the firewall, what impact has this on the Telepresence conference Ø Hardware Performance Determine latency measurements CPU Processing performance limitations Ø Quality Test end-to-end video/audio quality using perceptive analysis tools Test bandwidth performance use various video grades (low, medium, high resolutions) Classification Testing Ø Qo. S Testing Are Telepresence flows identified and handled correctly False negative tests – test with flows of similar nature ( e. g. P 2 P) False positive tests – a Telepresence flow is identified and handled incorrectly 5 www. shenick. com

Meeting Functionality Flow Control Testing Ø Video Switching – test video switching policies who has the floor testing Who is shouting the loudest to win control of the screen Sporadic Interruption through dynamic behaviour or un-muting of a participant Ø Audio – test the capability to deliver every end-points audio flows a heated discussion Security feature Testing Ø Assess muted room appearance functionality Ø Attempt to join conference with unknown/un-invited numbers 6 www. shenick. com

Emulated Telepresence Activity Per Flow Emulation & Performance Analysis Ø Emulate real stateful end-points, with real user activity Register with Telepresence Management Servers Participate in real calls Ø Accurate representations of real world devices Per end-point unique MAC address assignment Static and Dynamic IP address allocation IPv 4 and IPv 6 capabilities diversif. Eye’s flexibility enables users configure device properties easily, matching those in the Telepresence device management database 7 www. shenick. com

Real User Activity Participation with as close to real activity is key in performance testing Telepresence systems and deployments, dynamic behavior adds a level of un-predictability to the likely results outcome Ø Unique video and audio per emulated Telepresence end-point Ø Ability to vary codecs for video and audio Ø Auxiliary inputs e. g. Videos, Presentations Ø Dynamic behaviour to emulated end-points Loudness (peak level, duration, etc) Mute / Un-mute calls in live tests Shenick’s diversif. Eye enables users set various levels of loudness per emulated Telepresence end-points Mute / Un-mute calls during live tests 8 www. shenick. com

Sample Performance Analysis Measure performance on each and every individual emulated Telepresence end-point Ø In multi-point calls determine how varying network architectures/settings impact call performance Sample Performance Metrics per unique Telepresence end-point Ø Video Quality – Use perceptive analysis tools to deliver MOS scores Ø Audio Quality – Use perceptive analysis tools to deliver MOS scores Ø RTP Bandwidth – bits or packets per second Ø SSRC rate – Sent / received Ø RTP packet metrics – Dropped/Duplicate Ø RTP Video frame count / Video frame jitter Ø Out Calls Attempted / Established / Rejected Shenick’s diversif. Eye delivers real-time results analysis, on a per emulated Telepresence end-point basis. Examine during live tests the impact of different traffic volumes and application types 9 www. shenick. com

Open Test Strategy Telepresence will run in parallel to other services such as voice, video and data. Ø It’s essential to determine the impact Telepresence deployments have on existing services Ø It’s also important to understand how Telepresence is impacted by adding other traffic sources and varying these flows loads. Ø Test with both legitimate and illegal traffic flows, spam, virus, worms, DDOS, etc In the following open test scenario Ø What’s a relevant / realistic MOS score for Telepresence in live networks? Ø Who would you perceive as the happiest customer? Telepresence MOS (video / audio) HTTP Downloads (seconds) P 2 P traffic flows (present) Vo. IP Mo. S Email send time (ms) Enterprise A 4. 5 / 4. 5 25 3 950 Enterprise B 3. 9 / 4. 0 1 4. 6 5, 000 Enterprise C 4. 2 / 4. 4 10 4. 5 2, 000 10 www. shenick. com

diversif. Eye emulates stateful clients with real world functionality and features for Telepresence diversif. Eye provides stateful traffic emulation of many common applications and traffic flow types: IGMP / MLD, Vo. D (RTSP), Vo. IP, Dual Hosted Vo. IP, RTP, PPPo. E, HTTP, P 2 P, VLAN, DHCP, P 2 P TCP Playback, SMTP, POP 3, FTP, TWAMP, SSL/TLS Mix legal and illegal flows: include DDo. S type attacks, emails with vrius, spam attacks, etc diversif. Eye may support a mix of client and/or server applications using IPv 4 and/or IPv 6 on a single test interface port. Support for IPv 6 transition protocols: Dual-Stack Lite, 6 rd / 6 to 4 diversif. Eye is used in ‘Per flow’ application emulation and performance analysis of multiple environments including : x. DSL, x. PON, IMS, CABLE, Wi. MAX & LTE Capture and replay TCP, UDP (files >1 Gb) Fully compliant TCP stack 11 www. shenick. com

servic. Eye Spider Remote Network Test with centralized management and control Tap into the power of a sophisticated lab tester from multiple remote network sites 12 www. shenick. com

Thank You! Questions & Answers email : mark. lambe@shenick. com Shenick Network Systems 13 www. shenick. com