Scotts Valley, CA (PRWEB) September 26, 2012
In the new cloud based network computing paradigm, networked applications and devices may not perform in the cloud as they perform in the local area network. Evaluating this performance prior to deployment is essential to guarantee the success of a cloud based initiative. The question is -- how does the IT staff evaluate the performance?
Field trials provide limited information because the full range of possible adverse network conditions are typically not encountered (e.g. network congestion, outages). Network emulators introducing packets drops, delays, etc. provide some useful data, but their lack of true Internet/WAN fidelity means the results are neither reliable nor repeatable.
With the introduction of Maxwell Network Emulator in 2003, an accurate emulation of Internet/WAN fidelity became possible in the lab. For the first time, non-Internet traffic could be removed from the stream, allowing IT staff to evaluate performance and get the required data. For the first time, bi-directional traffic could be incorporated in the emulation.
Now, the ITU has recognized these same fidelity issues and codified the principles for accurate emulation in the latest version of the ITU Recommendation.
The newest version of the ITU-T G.1050 (March 2011) specifies capabilities available in the Maxwell Network Emulator since its inception.
Updates from the previous edition include:
--Providing realistic mechanism modeling
--Adopting easier extension of mathematical models to other scenarios
--Simulating discrete events
--Supporting a true bidirectional model
--Dropping the "likelihood of occurrence" concept
--Updating impairment levels
--Reducing the number of standard test cases
--Customizing test cases
Examples of how the ITU-T G.1050 is used:
•Simulation of real-world IP network impairments;
For example, Maxwell Pro simulates airline pilot to ground traffic control based communications.
•Testing any type of IP stream under simulated network conditions using pcap files and evaluating the IP stream using standard test cases or user-defined simulated network conditions;
For example, Maxwell Pro simulates an overloaded BACnet/IP (Building Automation Control Network) to replicate poor performance.
•Testing any type of IP stream using hardware emulation of simulated network models using standard test cases or user-defined simulated network conditions;
For example, Maxwell Pro simulates audio interaction over the Internet for gaming applications.
Maxwell Offers Additional Internet Performance Tests
In addition to the G.1050 March 2011 network model tests, Maxwell also includes a set of rigorous tests for validating the correct implementation of:
•Session Initiation Protocol (SIP) that is widely used to set up calls in VoIP and Video network devices
•Secure Shell / Transport Layer Security Protocol (SSH/TLS) for securing data exchange between client-server applications
•Transmission Control Protocol (TCP) and Internet Protocol (IPv4 and IPv6) for finding and fixing bugs (compliance to standards)
•Geosynchronous Satellite Link Emulation for pre-deployment testing of satellite applications
•Bandwidth Limited and Rate Limited Scenarios
About InterWorking Labs
InterWorking Labs optimizes application performance in mobile, cloud, and wide area networks. The Company's products and services help customers diagnose, replicate, and remediate the performance of embedded systems and network applications.
InterWorking Labs empowers its global customers to develop and deploy the highest quality and most reliable network devices while maximizing the most utility from their networks. Notable clients include Alcatel-Lucent, Apple, AT&T, Boeing, Cisco Systems, Ericsson, Hewlett Packard, Intel, Juniper Networks, Microsoft, Motorola, Nokia, Oracle, Samsung, the U.S. Government, and Xerox.
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