Knowledge Base

Title Authors Category Updated
SATA_Use_Cases_Presentation IOL

SATA uses in the enterprise
SATA uses in personal computing
Device form factors
ODDD, HDD and SSD Devices
Port Multipliers.

Tutorials September 23, 2014
SCSI Command Overview IOL

Overview of the basic SCSI information needed to identify each command.

Tutorials September 23, 2014
Seconds per... Jeff Laird

A spreadsheet to help one develop a sense of time scales

White Papers May 9, 2012
Simulating Gaussian Crosstalk for DSL Testing Timothy R. Clark

The presence of crosstalk is a major detriment to the performance of Digital Subscriber Line (DSL) transceivers. It is therefore important to test performance under a wide variety of crosstalk scenarios. This thesis presents the development of a crosstalk noise generation system as a tool for DSL performance testing. Where many commercially available solutions are limited to specific testing needs, the system presented here is universal and can simulate virtually any noise scenario conceivable for DSL deployment.
Several requirements for the accurate frequency domain modeling of DSL crosstalk are presented. The time domain properties of crosstalk were also studied with particular attention paid to the amplitude distribution. The importance of a Gaussian amplitude distribution and the limiting effect of a finite-length pseudo-random crosstalk sequence on the "tail" of the Gaussian distribution were investigated. A method of forcing finite-length crosstalk sequences to have a "near-Gaussian" amplitude distribution is proposed.

Theses June 27, 2012
SIP Trunk Interworking: How the SIP Forum is Improving Interoperability between SIP-PBXs and Service Providers James Swan (UNH-IOL), John Berg (CableLabs), David Hancock (CableLabs)

Interworking issues continue to be an obstacle to achieving scale on SIP Trunk deployments. Due to variances in the SIP profiles supported by different SIP Trunk products, Service Providers and vendors are forced to spend significant time and people resources to identify and resolve interworking issues for each new SIP-PBX/SSP-network combination. The SIP Forum has been actively working on multiple fronts to resolve this interworking roadblock, and to move the rollout of SIP Trunking service toward more of a plug-and-play deployment model.

This session provides a status update on two important SIP Forum initiatives in this area:

1. The SIPconnect 1.1 Recommendation: This recommendation defines a SIP profile for the SIP Trunk interface between a SIP-PBX and Service Provider network. It defines procedures to resolve common interworking issues at the SIP Trunk interface for capabilities such as security, PBX registration, and call features.

2. The SIPconnect 1.1 Interop and Compliance Program: The focus of this program is to encourage the adoption of SIPconnect 1.1 through a series on interop events, and ultimately to develop a rigorous test-platform-based compliance program that will enable vendors to indicate product compliance with SIPconnect 1.1.

External Links July 3, 2012
Software Defined Radio (SDR) Based Implementation of IEEE 802.11 WLAN Basedband Protocols Shravan Surineni

The IEEE 802.11 family of wireless LAN protocols defines multiple physical layers implementations of which direct sequence spread spectrum (DSSS, 802.11b) and orthogonal frequency division multiplexing (OFDM, 802.11a/g) are currently the most popular. Market pressures are forcing the convergence of multiple wireless protocols into the same access device, and shortened product design cycles dictate rapid prototyping of new or enhanced protocols. The computationally intensive signal processing algorithms and high data rates associated with these protocols necessitate dedicated hardware implementation of some portions of the signal processing chain, yet allocating separate hardware resources for each of the standards would make the "universal access device" bulky and inefficient. Re-using the same software-reconfigurable hardware to handle different processing algorithms would enable an efficient, flexible alternative to current prototyping and implementation methods. In this thesis, the feasibility of using Software Defined Radio architectures as a prototyping tool for wireless LAN baseband signal processor implementations is explored. Signal processing architectures and algorithms for DSSS and OFDM protocols were developed in the Simulink and Matlab environments, and were then translated to VHDL hardware descriptions. A reference design for a OFDM transmitter was synthesized for implementation on a Xilinx Virtex II FPGA, and functional and timing simulations verified the design correctness.

Theses May 17, 2019
Space-Time Diagrams (PPT) Jeff Laird

used at UNH-IOL for training and discussion

White Papers December 6, 2012
Super Demo 2004 MFA and MSF

SuperDemo 2004 was the product of a partnering of the Multiservice Switching Forum (MSF) with the MPLS & FR alliance. Eleven companies participated in expanded testing including advanced service provider applications. The collaboration of the MSF and the MFA took the meaning of success to another level in the industry. The Multi-Vendor MPLS infrastructure was constructed for stability and reliability. The Demonstration of VoIP services across this network clearly conveyed a feeling of resilience.

White Papers June 28, 2004
SuperDemo 2003 MFA

SuperDemo 2003 was the worlds most advanced and comprehensive live test of multiple MPLS services operating concurrently across a multi-vendor MPLS network. The MPLS/FR Alliance SuperDemo included 14 different companies showcasing MPLS services and features such as VPLS, ATM/FR/Ethernet over MPLS, BGP MPLS VPNs and Fast re-route.

White Papers June 9, 2003
TCP Testing Requirements (Test Plan Supplement) UNH-IOL

The purpose of this document is to specify requirements to perform the Transmission Control Protocol Test Specification.

Tutorials March 12, 2007
Technical Report - TR0101 Ashish Palekar

Design and Implementation of a SCSI Target for Storage Area Networks.

Theses June 29, 2012
Technical Report - TR0106 Anshul Chadda

Design, Implementation, and Performance Analysis of Session Layer Protocols for SCSI over TCP/IP.

Theses June 29, 2012
Testing & Interoperability: How the UNH-IOL Continues to Impact NBASE-T Success Mike Klempa

Join us for this 20-minute webinar discussing:

  • Mission and focus of the UNH-IOL in the technology industry
  • The UNH-IOL contributions to the NBASE-T Alliance in leading multi-vendor interoperability events, and demonstrating NBASE-T capabilities and benefits such as 6-around-1 cable testing and Downshift
  • The importance of electrical conformance testing offered for NBASE-T products 
  • Strategies to develop the next generation of networking engineers
Tutorials August 9, 2018
Testing Home Routers for World IPv6 Launch Timothy Winters

The University of New Hampshire InterOperability Laboratory (UNH-IOL) hosted its fourth IPv6 Customer Edge (CE) Router Interoperability Test Event the week of April 16 - April 20, 2012 at its 32,000+ square-foot facility in Durham, New Hampshire. The test event brought together both users and suppliers of CE routers, also known as home router equipment. The purpose of the test event was to gain a perspective on the current status of IPv6 interoperability against the Internet Engineering Task Force (IETF) Basic Requirements for IPv6 Customer Edge Routers and support the Internet Society (ISOC) World IPv6 Launch. The eight participating vendor companies tested a total of ten distinct home router implementations throughout the week using publicly routable IPv6 addresses. Participants included Broadcom, CHT-TL IPv6 Testing Lab, D-Link, NDM Systems, Motorola Mobility LLC, Netgear, Time Warner and ZyXEL.

Observations discussed in this paper include:
* DHCP Solicits Frequency
* Renumbering
* No Default Route
* Forwarding before Address Acquisition
* DHCPv6 IA_PD & IA_NA Interactions

White Papers August 31, 2012
Testing TRILL (TRansparent Interconnect for Lots of Links) Christina Dube

The University of New Hampshire InterOperability Laboratory (UNH-IOL) hosted its second TRansparent Interconnect of Lots of Links (TRILL) Interoperability Test Event the week of November 26 – December 1, 2012 at its 32,000+ square-foot facility in Durham, New Hampshire. The test event brought together implementers of TRILL as well as test equipment manufacturers that support TRILL. The purpose of the test event was to gain a perspective on the current status of TRILL implementation and interoperability. Participants included Hewlett-Packard Networking, Extreme Networks, Ixia and Spirent Communications.

White Papers February 18, 2013
Testing Triple Play Services and Security in Enterprise Networks Wireless, Bridge Functions, and VoX Consortiums

Testing scenarios, caveats and issues encountered in testing converged or "triple play" (voice, video, data) services and security in converged enterprise-class deployment scenarios.

White Papers May 4, 2005
The Ethernet Effect: Collaboration, Interoperability, and Adoption of New Technologies Seamus Crehan, George Kimura, Eric Lynskey and Chris Volpe

Representing the first public summary of objective, multi-vendor Ethernet conformance and interoperability testing conducted over an extended period. This whitepaper summarizes seven years of Fast and Gigabit Ethernet testing data gathered through the end of 2005, including test reports from 900 individual products representing several hundred companies.

White Papers January 1, 2006
The Extended Sockets Interface for Accessing RDMA Hardware Dr. Robert Russell

The Extended Sockets API (ES-API) is a specification published by the OpenGroup that defines extensions to the
traditional socket API which include two major new features: asynchronous I/O, and memory registration. These
features enable programmers to take advantage of today's
multi-core processors and Remote Direct Memory Access
(RDMA) network hardware, such as iWARP and InfiniBand interfaces, in a convenient yet efficient manner.
This paper describes the UNH EXS interface, an implementation of the ES-API that provides additional API
facilities which enable a programmer to utilize RDMA network hardware while selectively choosing those features of
this interface that are most germane to the particular application. In addition, the UNH EXS interface is implemented
entirely in user space on the Linux operating system. This
provides easy porting, modification and adoption of UNH EXS, since it requires no changes to existing Linux kernels.
Preliminary results demonstrate that applications based on
EXS can achieve high bandwidth utilization and low CPU
overhead.

White Papers December 7, 2012
The History of BASE-T Ethernet Curtis Donahue, Michael Klempa

Learn about the history of BASE-T Ethernet and how the technology evolved over time including adjustments to technology, all in this downloadable info graphic. 

Tutorials September 14, 2017
The OCP NIC 3.0 Fixture & What is Means for Datacenters

The Open Compute Project (OCP) in conjunction with the UNH-IOL, has projects underway to integrate and validate new form factors for using PCIe in servers to address server needs. Let’s now review the limitations typically faced by server manufacturers, such as thermal considerations, connector size, and data rates, and solutions to these limitations in this interview with David Woolf and Mike Klempa at the lab.

External Links December 12, 2019
Time Sensitive Networking (TSN) Overview Bob Noseworthy

Not familiar with TSN? Refer to the following overview summarizing activities and materials from Michael Johas Teener (IEEE 802.1 TSN Chair), Dr Edward Lee (UC Berkley), and numerous other parties, conferences and events.

Get involved!

Tutorials January 13, 2016
Timing Challenges in the Smart Grid Jason Allnutt, Dhananjay Anand, Douglas Arnold, Allen Goldstein, Ya-Shian Li-Boboud, Aaron Martin, Cuong Nguyen, Bob Noseworthy, Ravi Subramaniam, Marc Weiss

Correct time and timing is one of the foundational elements in enabling the communication and orchestration of technologies for accurate and optimal wide area monitoring, protection and control (WAMPAC) in the power industry. The National Institute of Standards and Technology (NIST) and the International Electrical and Electronic Engineer-Standard Association (IEEE-SA) conducted a workshop to gather inputs from stakeholders to identify, analyze, and provide guidance on technologies, standards and methodologies for addressing the practical timing challenges that are currently being experienced in wide area time synchronization. 

External Links March 20, 2017
TR-069 - A Crash Course Jason Walls, Tim Sheehan

A detailed overview of the CPE WAN Management Protocol as specified in Broadband Forum Technical Report 069 and related documents

Tutorials December 21, 2009
Transparent Interconnection of Lots of Links (TRILL) Deployment Nears UNH-IOL

An exciting milestone on the road to TRILL deployment occurred from August 3rd to 5th 2010 at the University of New Hampshire InterOperability Laboratory (UNH-IOL), as a group of companies attended the first multi-vendor TRILL plugfest. The plugfest was successful in demonstrating interoperability between TRILL devices. It was a first step towards wide deployment of TRILL and valuable knowledge for increasing TRILL interoperability was gained through the event.

White Papers June 26, 2012
Transparent Interconnection of Lots of Links (TRILL): An Overview and Research Opportunities David Bond

This presentation provides a high level overview and introduction to TRILL, and related technologies.

Tutorials June 26, 2012