Network Simulation Tools

PacketStorm Communications, Inc. was founded in November 1998 by a group of engineers fromthe prestigious Bell Laboratories.PacketStorm develops, manufactures, and supports high end testing solutions for the InternetProtocol (IP) communications market. PacketStorm is the market leader for advanced IP NetworkEmulators with dynamic and traffic conditioning emulation. PacketStorm sells test solutionsthrough a global network of independent representatives and international distributors.EmploymentJoin a fast growing , pre-IPO high tech company near the New Jersey shore. You will have anopportunity to work with the very best in the industry, and be well rewarded as the companygrows.PacketStorm provides very competitive compensation including full benefits, profit sharing, andstock options. We are located five minutes from the beach, one hour from New York city, and oneand a half hours from Philadelphia.

The Internet, private wide area networks, and cloud services represent some of the aspects thatconnect the user to their application. As users demand faster response and more complex datafrom their applications, the networks carrying this data are under greater pressure to meet theseexpectations. To truly test out applications before rolling it out to the users, network emulationmust be used. Network emulation is also referred to as wan emulation.Network emulation is used by manufacturers, service providers, and applications developers toverify the robustness of their network product or application. A wan emulator recreates the realworld effects seen in the network. Standard features of network emulators include filtering,impairments, modifiers, and routing.Filtering allows the wan emulator to separate traffic into different groups to represent differentnetworks. Therefore, a network emulator emulates multiple network scenarios between twoemulator ports. Even though end devices are only feet apart and connected to the same serverthrough the emulator, device “A” and device “B” could be viewed to be on different sides of theworld by the server.Impairments are a core component of a network emulator. Standard impairments include: delay,jitter, packet loss, fragment, and bandwidth restriction. However, with the vast majority of trafficbecoming video, video specific impairments such as FEC, Active Video, or Over-The-Top dynamicimpairments have become essential.

PacketStorm has developed products to address the video application test requirements. Productsprovide network simulation (network emulation), capture video files, replay video files, andreplicate video streams. These products have a number of unique video application features suchas: DASH dynamic network emulation, FEC Aware network emulation, Hitless network emulation,large capture and replay files, and video server farm stream emulation. Dash Dynamic Adaptive Streaming over HTTP (DASH) is also referred to as Over The Top (OTT). OTT examples include: Netflix, Redbox, HULU, and YouTube. Other video clients besides DASH are Silverlight, HLS, and Flash.Hitless / Seamless Protection FEC TestingHitless or also called Seamless Protection is a Forward Error Correction (FEC) is a method tomethod to transport video between two transmit additional packets (FEC Row and Columnpoints without any loss. packets) to overcome packet loss. SMPTE 2022 1/2 and SMPTE 2022 5/6 are standards that specify the transmission specifications. FEC testing includes Active Video, burst loss, and FEC aware tests.

Voice over Internet Protocol (VoIP) has made great strides in recent years, and VoIP networks,public and private, are becoming more and more common. However, IP, by its very nature, is anunreliable networking protocol. In its most basic form, IP makes no delivery, reliability, flowcontrol, or error recovery guarantees. As a result, IP may have changing delays, packet loss, ordeliver packets out of order. When attempting to understand and predict the VoIP user experiencein pre-deployment planning requires that real world and worst-case network conditions beconsidered. The PacketStorm family of network emulators addresses these concerns in three ways:product evaluation, pre-deployment testing, and troubleshooting. The above figure illustrates a typical carrier class VoIP system. A traditional phone system and PBX resides on the customer premise, connected to the PSTN with standard analog or T-1 tie lines. However, once the call is delivered to the PSTN, rather than using traditional circuit switching to connect the call to the distant end, the media gateway is responsible for packetizing the voice into RTP data packets, while thesignaling gateways and/or softswitches are responsible for translating phone numbers and IPaddresses back and forth and routing the call properly.

Features 20 Gbps Architecture 10 Gbps Module 1 Gbps Module Easy-to-use GUI Impairments Packet Filtering Impair IP and non-IP traffic Mesh Network EmulationApplications The PacketStorm4XG IP network emulator provides WAN emulation for multiple 1Gbps and 10Gbps ports.The Storage PacketStorm4XG has over 32 million packets per second Video throughout. Up to two 10Gbps or sixteen 1Gbps ports can be efense installed in one chassis. The PacketStorm4XG impairs IP and Network Security non-IP traffic. Carriers Manufacturers

There’s been an incredible growth in storage requirements in recent years by new dataapplications, e-mail, the Internet, and new government regulations. In the past, corporations woulduse direct attached storage, islands of storage for each server. In recent years, corporations areconsolidating their data center storage to create a Storage Area Network (SAN). SANs enablemultiple servers to gain access to the same storage. SAN’s are typically based on fiber channel.Fiber channel is a protocol designed for high performance block data transfer with very lowlatencies. Today, more companies want to extend the benefits of SANs over Internet Protocol (IP)networks to enable more users to access data. Network Attached Storage (NAS) devices allow companies to attach scalable storage directly to existing LAN network infrastructure providing lower cost and easier maintenance. Two methods are Fiber Channel over IP (FCIP) and Internet SCSI (iSCSI). Both standards are targeted at moving block-level data over IP networks, while also leveraging the large installed base of IP networking infrastructures for remote data access.iSCSI defines the encapsulation of SCSI packets in TCP, which are routed using IP. This technologyallows block-level storage data to be transported over widely used IP networks, enabling end usersto access the storage network from anywhere in the enterprise.

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