GL Announces ExpertTCP™ to Ethernet/IP Test Platform

GL Communications Inc., announced today its enhanced PacketExpert™ - a Quad Port Ethernet/IP Tester. It is enhanced to support RFC 6349 frame work for TCP Throughput Testing Methodology referred to as ExpertTCP™.

Gaithersburg, MD, December 08, 2016 --( GL Communications Inc., announced today its enhanced PacketExpert™ - a Quad Port Ethernet/IP Tester. It is enhanced to support RFC 6349 frame work for TCP Throughput Testing Methodology referred to as ExpertTCP™.

Speaking to the press, Mr. Jagdish Vadalia, a Senior Manager for product development of the company said, “GL's PacketExpert™, both PacketExpert™ 1G and PacketExpert™ 10G have been enhanced to support RFC 6349 based TCP Throughput (ExpertTCP™) test functionality.

PacketExpert™ 1G has four 10/100/1000 Mbps Electrical/Optical ports and PacketExpert™ 10G has two 10 Gbps Optical ports and two 10/100/1000 Mbps Electrical/Optical ports and both are capable of Bit Error Rate Testing (BERT), Smart Loopback, RFC 2544 Testing, Record and Playback, Single Stream and Multi-stream Simulation of IP Links and Impairments (IPLinkSim™ and IPNetSim™), Multi-Stream Traffic Generation and Analysis, PacketBroker™, and Y.1564 Testing (ExpertSAM™).”

He added, “IP Network operators and Service providers need to verify that their networks are performing well and meet the Service Level Agreements (SLA) with the customers. To verify Ethernet/IP based networks, current widely used standards are RFC 2544 or Y.1564. However, both these standards are meant for testing at Layer2 or Layer3 (Ethernet or IP layers). Though these tests are necessary, they are not sufficient, because they do not cover testing at TCP layer. Most web based applications like Http, FTP, E-mail etc. run over TCP. Even many modern web applications like Facebook, YouTube and the like use TCP. Even if service provider networks are tested using RFC 2544 or Y.1564, customers may still face problems with TCP throughput.

The TCP throughput may not match the throughput at the Ethernet/IP layer. This is because TCP throughput depends on factors like the end node TCP Window Size, buffer size of intermediate network nodes etc. Also, impairments like latency and packet drops causes TCP retransmissions, severely affecting the TCP throughput. So, there is a gap in the current testing methods and to cover the gap RFC 6349 frame work has been devised.”

Mr.Vadalia further explained, “ExpertTCP™ performs bidirectional TCP throughput measurements in combination with another unit at the remote location (other end of the network), that acts as the TCP server. Many real-world networks are not symmetrical. There may be significant differences between upstream and downstream directions.”

He added, “ExpertTCP™ supports both Upstream (Client → Server) and Downstream (Server → Client) direction testing. Bidirectional simultaneous testing/unidirectional testing can be done. Results are reported for both directions.”

Important Features

.Path MTU, Baseline RTT and TCP Throughput tests supported for both directions (upstream and downstream) independently
.Supports Upstream (Local to Remote), Downstream (Remote to Local) and Bidirectional tests
.Hardware FPGA based TCP implementation supports full duplex bidirectional wirespeed TCP (up to 1 Gbps in both directions simultaneously)
.Supports multiple TCP connections (up to 16 TCP connections)
.Test asymmetrical path with separate set of configurations for Upstream and Downstream
.Complete remote control - user needs to interact only with local side - all results/statistics (both local and remote side) provided on local side
.Detailed run time statistics with graphs for easy visualizations
.RFC 6349 specified metrics - TCP Efficiency, Buffer Delay Percentage, TCP Transfer Time ratio
.Command Line Interface for automated testing and remote accessibility

About GL Communications Inc.,

GL Communications Inc, is a global provider of test and measurement solutions and has over the years worked with major telecom equipment vendors, service providers, and system integrators to meet the testing requirements arising at various stages of telecom products development life cycle.

GL offers a broad set of test solutions that help perform all types of testing on networks, from initial system design, to fine-tuning, troubleshooting, live deployment, and monitoring. The products are widely used to verify and ensure 'quality and reliability' of Wireless (4G LTE, 3G, 2G), SONET/SDH, IP, TDM, and PSTN networks.

GL core product development is backed by a strong team of R&D experts to match evolving market and technical challenges in a most cost-effective and innovative way.

Shelley Sharma
Phone: 301-670-4784
E-mail: info at
GL Communications Inc
Mr. Shelley Sharma