Support for Linux kernel versions including or later than 2. Visit the Control Panel or Network Preferences section of your system to assign static IP addresses or for other advanced configuration options. The yellow "Link" light should stay lit continuously when plugged into Ethernet. The green "Activity" light should flash slightly during data transfers - it almost appears solid green so look closely for flashing.
Should the yellow link fail to light or the green activity light fail to flash to indicate traffic, you might have a faulty device or a software issue. If so, please connect support plugable. We're here to help! Please reach out to us at support plugable. Computer networking is a complex topic. In this article, we'll be taking a deep dive on the nuances of network performance for those who need some additional explanation while striving to be concise, and to educate users of various experience levels relating computer hardware and computer networking.
Your LAN is essentially the network inside your home or business. In some cases, especially in businesses, you may have a separate modem and router, along with other equipment connecting to the router such as a network switch. Your modem, and the connection it establishes to your ISP—whether through coaxial cable, fiber, phone lines, or long-range wireless—essentially marks the point between the WAN and the LAN.
Almost every type of connection your computer makes to any piece of hardware will have a link rate of some kind. The link rate establishes how fast data can possibly be transferred across any given connection , but it does not guarantee how fast the hardware on either end of the connection will actually transfer data.
The concept of link rates, and their related bottlenecks, is likely best conveyed by giving an example of what connections might be involved in transferring a file from one computer on your LAN to another.
Following this chain, we see that Mbps is the slowest link rate established. This means that, regardless of the link rates established elsewhere, the absolute maximum the data can possibly be transferred is Mbps. A network interface represents connections, whether wired or wireless, that are made to form a network between devices. Some may refer to physical hardware connections as "ports". For the purposes of networking, ports are logical constructs that can also be referred to as "network ports".
Each network interface has 65, of these logical ports. Each port on a network interface is a separate data connection. Websites like speedtest. Transferring files from one computer to another on your LAN is typically not the best way to benchmark a network adapter. File transfers are bottlenecked by a number of things, including performance limitations of the disk the data is on, and often times a lack of establishing parallel network connections to perform the task.
One of the most accurate ways to benchmark network performance on a LAN is by using iPerf. To more effectively benchmark network adapter performance, it is best to establish a point-to-point connection between two PCs, rather than connecting through a router or switch.
To test a connection using iPerf, you'll need at least two network interfaces, and preferably two computers. You'll also need to know the IP Internet Protocol address assigned to each network interface. One network interface will function as an iPerf server, and the other network interface will function as an iPerf client.
Lastly, you'll need to download the version of iPerf 3. Additionally, we'll run the test for 30 seconds using -t 30 and with four parallel connections using -P 4. Running 4 parallel connections is optimal for saturating a network link.
This alleviates potential bottlenecks generated by storage devices, and allows you to explicitly control how many parallel connections are being used to transfer data rather than being unsure if parallel network connections are being used by other means. For situations where low latency is vital such as cluster or grid computing, the algorithm can reduce latency even more when InterruptThrottleRate is set to mode 1.
In simplified mode the interrupt rate is based on the ratio of TX and RX traffic. If the bytes per second rate is approximately equal, the interrupt rate will drop as low as interrupts per second. If the traffic is mostly transmit or mostly receive, the interrupt rate could be as high as Setting InterruptThrottleRate to 0 turns off any interrupt moderation and may improve small packet latency, but is generally not suitable for bulk throughput traffic.
In addition, the controller is automatically reset, restoring the network connection. To eliminate the potential for the hang, ensure that InterruptThrottleRate is set no greater than 75, and is not set to 0.
When e is loaded with default settings and multiple adapters are in use simultaneously, the CPU utilization may increase non- linearly.
In order to limit the CPU utilization without impacting the overall throughput, we recommend that you load the driver as follows:. The range of to interrupts per second works on a majority of systems and is a good starting point, but the optimal value will be platform-specific. This value specifies the number of receive buffer descriptors allocated by the driver.
Increasing this value allows the driver to buffer more incoming packets, at the expense of increased system memory utilization. Each descriptor is 16 bytes. A receive buffer is also allocated for each descriptor and can be either , , , or bytes, depending on the MTU setting.
The maximum MTU size is MTU designates the frame size. It only needs to be set for Jumbo Frames. Depending on the available system resources, the request for a higher number of receive descriptors may be denied. In this case, use a lower number. This value delays the generation of receive interrupts in units of 1. Receive interrupt reduction can improve CPU efficiency if properly tuned for specific network traffic. Increasing this value adds extra latency to frame reception and can end up decreasing the throughput of TCP traffic.
If the system is reporting dropped receives, this value may be set too high, causing the driver to run out of available receive descriptors. When setting RxIntDelay to a value other than 0, adapters may hang stop transmitting under certain network conditions. To eliminate the potential for the hang ensure that RxIntDelay is set to 0.
This value, in units of 1. Useful only if RxIntDelay is non-zero, this value ensures that an interrupt is generated after the initial packet is received within the set amount of time.
Proper tuning, along with RxIntDelay, may improve traffic throughput in specific network conditions. Speed forces the line speed to the specified value in megabits per second Mbps.
If this parameter is not specified or is set to 0 and the link partner is set to auto-negotiate, the board will auto-detect the correct speed. Duplex should also be set when Speed is set to either 10 or To remove the driver packages from a Linux Platform use the rpm -e command:. If your system uses the Microsoft Windows Server you must download and install the e device driver to install it. Download the driver from one of the following web site:. Click on the following exe files to install the driver:.
Follow the instructions in the install wizard. The autorun automatically runs after you have extracted the files. When the confirmation dialog displays, click OK. All rights reserved. Note - If the version number is 5. See Patch Requirements.
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