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Extreme Engineering Solutions Products By Category Accessories Carriers Development Systems FPGA Modules I/O Modules Mezzanine Modules Networking Power Supplies Processor Boards Rackmount Servers Rear Transition Modules Routers Rugged Systems Single Board Computers Solid-State Storage (SSD) Switches Capabilities Technologies Technologies Intel® Processor Technology NXP Processor Technology AMD (formerly Xilinx) FPGA Technology SecureCOTS™ VPX™ & OpenVPX™ Technology FPGA-Based VME Bridge IPMI for VPX Systems Cisco IOS-XE® Embedded Services Routing OS & Board Support Built-In Test (BIT) coreboot & FSP for Intel Green Hills INTEGRITY Linux NXP Hypervisor U-Boot Bootloader Unified Extensible Firmware Interface (UEFI) Wind River VxWorks Windows X-ES Enterprise Linux (XEL) Industries Military & Aerospace Custom Solutions Commercial & Industrial Communications Support Returns and RMAs Configuration Management Access SupportNet Technical Support About News & Media Partners What Customers Are Saying Careers Management Team Sales Contact Us Embedded Computing Applications X-ES provides a comprehensive line of 3U VPX and 6U VPX embedded computing products, including Intel® VPX, PowerPC VPX, and QorIQ VPX Single Board Computers (SBCs), carriers, switches, and I/O cards for embedded computing applications.Since the environmental and SWaP constraints associated with rugged, deployed solutions complicate the design and integration of these systems, X-ES provides system-level components such as backplanes, power modules, development platforms, and rugged, deployable systems.Explore Products 3U VPX FPGAsX-ES provides a high-performance FPGA processing module in the industry-standard 3U VPX form factor. This configurable module includes features such as FMC sites and daughter cards to simplify I/O compatibility for many different applications.View 3U VPX FPGAs VPX Rugged SystemsX-ES provides a line of high-performance, rapid-development 3U VPX Rugged COTS-Based Systems. These forced-air-cooled, fully ruggedized chassis are designed to meet the rigorous standards of MIL-STD-810 F/G and DO-160 while integrating the latest power-saving and performance-enhancing technology.View VPX Rugged Systems VPX Development SystemsX-ES provides a line of high-performance, flexible 3U VPX VITA 67 Development Systems. These conduction- and air-cooled, rapid-development platforms are designed to simplify development while integrating the latest power-saving and performance-enhancing technology.View VPX Development Systems 3U VPX SwitchesX-ES provides 3U VPX Gigabit and 10 Gigabit Ethernet switch modules. These boards are designed for maximum port density and performance, and are

Tested for use within extreme environments. They can be configured as a fully-managed Layer 2 switch, and can support compliance to the VICTORY specification as an Infrastructure Switch and Router.View 3U VPX Switches 6U VPX SwitchesX-ES provides a 6U VPX 10 Gigabit Ethernet switch module that supports various configurations of up to twenty-two 10 Gigabit Ethernet ports, twelve 10/100/1000BASE-T Ethernet ports, and eighty-eight 1000BASE-X Ethernet ports. It can be configured as a fully-managed Layer 2 switch or optionally as a Layer 3 Router, and can support compliance to the VICTORY specification as an Infrastructure Switch and Router.View 6U VPX Switches 3U VPX Power SuppliesHigh-performance and extremely rugged 3U VPX power supplies from X-ES enable integrators to reduce the SWaP, cost, and complexity from their system. These power supplies have been designed and tested to a number of Military standards, including MIL-STD-704, MIL-STD-1275, MIL-STD-461, and MIL-STD-810. X-ES power supplies can also be integrated into our rugged systems and development systems.View 3U VPX Power Supplies 3U VPX CarriersX-ES provides a 3U VPX-REDI Carrier card solution, the XChange3000. It can support a single-width XMC or PrPMC card. The XChange3000 provides easy integration of standard mezzanine cards into modern VPX backplanes.X-ES offers a wide variety of XMC/PMC mezzanine boards to pair with our 3U VPX carrier.View 3U VPX Carriers 3U VPX StorageX-ES provides 3U VPX-REDI Solid-State Drive (SSD) Storage solutions. They are capable of operating within the demanding environments of MIL-STD-810F including harsh temperatures from -40°C to 85°C as well as rigorous shock and vibration conditions.X-ES 3U VPX SSD Storage can support up to a total of 2 TB of storage and utilizes solid-state NVM Express® technology to provide a high-performance, high-density, reliable memory solution.View 3U VPX Storage Modules 3U VPX RTMsX-ES provides 3U VPX Rear Transition Modules (RTMs) that enable I/O expansion and access for a variety of products, such as 3U VPX SBCs and switches. Features include access to as many as fourteen Gigabit Ethernet ports, a JTAG header, micro-DB-9 connectors, RS-232/422/485 serial, SATA, DisplayPort interfaces, and USB.X-ES 3U VPX RTMs can provide I/O expansion to our rugged systems and development systems.View

3U VPX RTMs 6U VPX RTMsX-ES provides 3U VPX Rear Transition Modules (RTMs) that enable I/O expansion and access for a variety of products, such as 6U VPX SBCs and switches. Features include access to as many as fourteen Gigabit Ethernet ports, a JTAG header, micro-DB-9 connectors, RS-232/422/485 serial, SATA, DisplayPort interfaces, and USB.X-ES 6U VPX RTMs can provide I/O expansion to our rugged systems and development systems.View 6U VPX RTMs 3U VPX BackplanesX-ES provides 3U VPX backplanes that are designed in accordance with the OpenVPX™ system architecture specifications. These backplanes can support up to two 3U VPX centralized switches, and can support an expansion plane leaf node connection for each slot connected to the centralized switch. With support for up to six 3U VPX payload slots, DC-DC power supply support, VITA 46.10 RTM support, and more, X-ES is certain to have a backplane to support your development needs.View 3U VPX Backplanes

Compared to the execution time of 0.072 secs.4. Using the lsof CommandWe can also use the lsof utility with the -i option to verify if the port is open for connection:$ lsof -i:8001COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAMEnc 19135 shubh 3u IPv4 326527 0t0 TCP *:8001 (LISTEN)nc 19135 shubh 4u IPv4 326528 0t0 TCP localhost:8001->localhost:55368 (ESTABLISHED)nc 19138 shubh 3u IPv4 326555 0t0 TCP localhost:55368->localhost:8001 (ESTABLISHED)$Since we’re interested only in the LISTEN mode, let’s add a grep filter to our command:$ time (lsof -i:8001 | grep "LISTEN")nc 19135 shubh 3u IPv4 326527 0t0 TCP *:8001 (LISTEN)real 0m0.625suser 0m0.133ssys 0m0.492s$Notably, it takes more time than the netstat or the ss utility to display the relevant information. Here, we explicitly filtered the output using the grep command. Let’s also try to use the inbuilt flags -iTCP -sTCP:LISTEN to list the network files in LISTEN mode:$ time (lsof -iTCP:8001 -sTCP:LISTEN)COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAMEnc 19135 shubh 3u IPv4 326527 0t0 TCP *:8001 (LISTEN)real 0m0.496suser 0m0.090ssys 0m0.407sAlthough we were able to bring down the execution time, it’s still considerably large as compared to the netstat and ss utilities.5. ConclusionIn this article, we discussed ways to test if a port is open for connections in Linux.We started by discussing the solution using the netstat tool. Additionally, we also explored the various netstat options to achieve a time-efficient solution. Then, we checked the solution using the ss command.Finally, we presented techniques to test the port state using the lsof command. From our benchmarking, we can conclude that using the ss utility with the best-suited options can be an efficient way to test the port state in Linux.

Abstract Intel Omni-Path Architecture (OPA) is a family of PCIe adapters, switches, cables, and management software that provides high-performance connectivity between servers. This product guide describes the PCIe adapters, known as Omni-Path Host Fabric Adapters (HFAs).This product guide provides essential presales information to understand the OPA 100 Series Host Fabric Adapters and their key features, specifications, and compatibility. This guide is intended for technical specialists, sales specialists, sales engineers, IT architects, and other IT professionals who want to learn more about HFAs and consider their use in IT solutions. Change History Changes in the November 17, 2021 update:The following cables are withdrawn from marketing - Supported cables section: 15m Intel OPA 100 Series Active Optical QSFP28 Cable, 00WE067 20m Intel OPA 100 Series Active Optical QSFP28 Cable, 00WE071 Introduction Intel Omni-Path Architecture (OPA) is a family of PCIe adapters, switches, cables, and management software that provides high-performance connectivity between servers. It is designed for high performance computing (HPC) workloads and has the ability to scale to thousands of nodes.The PCIe adapters, known as Omni-Path Host Fabric Adapters (HFAs) use an advanced connectionless "on-load" design that uses the processing capacity of Intel Xeon processors in the server to automatically scale fabric performance as server processor core counts increase.The following figure shows the Intel OPA 100 Series Single-port PCIe 3.0 x16 HFA.Figure 1. Intel OPA 100 Series Single-port PCIe 3.0 x16 HFA Did you know? Omni-Path Architecture is a new networking topology that was designed specifically to scale cost-effectively from entry level HPC clusters to larger clusters with 10,000 nodes or more. The Intel OPA adapters, in conjunction with a switching fabric, help enable the progression towards Exascale computing while cost-effectively supporting clusters of all sizes with optimization for HPC applications at both the host and fabric levels. Part number information The following table shows the part numbers and feature codes for the Omni-Path 100 Series adapters.The part numbers include the following: One adapter with a full-height (3U) bracket attached Additional low-profile (2U) bracket included in the box Installation and warranty information Supported cables The Intel Omni-Path host fabric adapters support the copper and fiber optic cables listed in the following table. Features The Omni-Fabric Architecture 100 Series adapters have the following features:Available in PCIe x8 and PCI x16 host interfaces The PCIe 3.0 x16 adapter supports the full 100 Gb/s link speed, whereas the PCIe 3.0 x8 adapter operates at a