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Go to StarTech.comUSB 2.0 to Gigabit Ethernet NIC Network Adapter
Add Gigabit Ethernet to any USB 2.0 compatible PC or Laptop computer
Product ID: USB21000S2
- USB to RJ45 adapter supports Gigabit networking over USB 2.0 with up to 480 Mbps of bandwidth
- IEEE 802.3, 802.3u and 802.3ab (10BASE-T, 100BASE-TX, and 1000BASE-T) compatible
- Powered directly from the USB ports
- Jumbo Frame support up to 9 KB
- Supports Microsoft NDIS 6.2 Checksum Offload (IPv4, IPv6, TCP, UDP) and Large send Offload
- Crossover Detection & Auto-Correction (Auto MDIX)
- IEEE 802.1Q VLAN Tagging support
- Embedded 20KB SRAM for packet buffering
- Activity and Gigabit Link LED indicators
- Compact, lightweight design for maximum portability
Overview
The USB21000S2 USB 2.0 to Gigabit Ethernet Adapter offers a reliable USB Ethernet connection, adding a single RJ45 Ethernet port to a USB-enabled computer system, with support for connecting to Gigabit networks.
Backward compatible with older USB 1.x computer systems, this compact and portable USB Gigabit network adapter offers an ideal desktop replacement network adapter or laptop accessory. With support for features such as Jumbo Frames and VLAN tagging, the adapter is suitable for home and business users alike.
The USB21000S2 USB Gigabit network adapter is backed by a StarTech.com 2-year warranty and free lifetime technical support.
The StarTech.com Advantage
- Compatible with Gigabit Ethernet networks and powered via USB for versatility and portability as an add-on or replacement
- The Gigabit USB adapter helps conserve system resources, using built-in NDIS6 Checksum and Large Send Offload support and Jumbo Frames
- The USB Gigabit Ethernet adapter is backed by a StarTech.com 2-year warranty and free lifetime technical support, ensuring reliability
Applications
Add gigabit Ethernet capabilities to a desktop or laptop without opening the computer or taking up an available expansion slot
Replace a failed integrated network adapter with an external, USB Ethernet connection, instead of having to open a desktop or laptop computer case
Connects your laptop PC to a Gigabit network or backbone - perfect for small or home offices, departmental network applications and network gaming
Technical Specifications
Product Numbers | ||
---|---|---|
UPC Code | 065030847445 |
Warranty Information | ||
---|---|---|
Warranty | 2 Years | |
Hardware | ||
Bus Type | USB 2.0 | |
Chipset ID | SMSC - LAN7500 | |
Industry Standards | IEEE 802.3/ 802.3u/ 802.3ab | |
Interface | RJ45 (Gigabit Ethernet) | |
Ports | 1 | |
Performance | ||
Auto MDIX | Yes | |
Buffer Size | 20 KB | |
Compatible Networks | 10/100/1000 Mbps | |
Full Duplex Support | Yes | |
Maximum Data Transfer Rate | 480 Mbps (USB 2.0) | |
MTBF | 70,000 hours | |
Type and Rate | USB 2.0 - 480 Mbit/s | |
Connector(s) | ||
Connector Type(s) | 1 - RJ-45 Female | |
1 - USB Type-A (4 pin) USB 2.0 Male | ||
Software | ||
OS Compatibility | Windows® XP, Vista, 7, 8, 8.1, 10 Windows Server® 2003, 2008 R2, 2012, 2012 R2 Mac OS X® 10.6 to 10.9 Linux 2.6.x to 4.4.x LTS Versions only |
|
Special Notes / Requirements | ||
System and Cable Requirements | Available USB port | |
Indicators | ||
LED Indicators | 1 - Activity | |
1 - Gigabit Link | ||
Power | ||
Power Source | USB-Powered | |
Environmental | ||
Humidity | 5% ~ 95% RH | |
Operating Temperature | 0°C to 70°C (32°F to 158°F) | |
Storage Temperature | -20°C to 75°C (-4°F to 168°F) | |
Physical Characteristics | ||
Color | Black | |
Enclosure Type | Plastic | |
Form Factor | Attached Cable | |
Product Height | 0.8 in [20 mm] | |
Product Length | 10.6 in [270 mm] | |
Product Weight | 1.4 oz [39 g] | |
Product Width | 1.2 in [30 mm] | |
Packaging Information | ||
Package Quantity | 1 | |
Shipping (Package) Weight | 4.5 oz [128 g] | |
What's in the Box | ||
Included in Package | 1 - USB Gigabit Adapter | |
1 - Driver CD | ||
1 - Instruction Manual |
Compatibility






Windows Server® 2003, 2008 R2, 2012, 2012 R2
Mac OS X® 10.6 to 10.9
Linux 2.6.x to 4.4.x LTS Versions only
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Product Support
Drivers & Downloads
Driver(s):
Manual(s):
-
USB21000S2.pdf
English
Compliance Letter(s):
Data Sheet(s)
- USB21000S2_Datasheet.pdf
English
Frequently Asked Questions
Installation
Prior to installing this device, ensure that your operating system is up to date (for example, you have installed the most recent service pack).
To install the driver:
- Download the latest drivers from the StarTech.com website (http://www.startech.com/Support). You can find the part number and product ID on the product’s packaging.
Note: Windows will typically save the files to the Downloads folder that is associated with your user account (for example, C:\Users\your_name\Downloads).
- Once the download is complete, right-click the zip folder that you downloaded, select Extract All, and follow the on-screen instructions.
- Select the appropriate folder for your operating system.
- Right-click Setup.exe.
- Click Run as Administrator.
Note: If the Run as Administrator option is not available, you might be attempting to run the installer from within the zipped file. Extract the files using the instructions in Step 2.
- Follow the on-screen prompts to install the device drivers and restart the computer when prompted.
- Your computer will automatically complete the driver installation and your device should be ready to use.
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Prior to installing this device, ensure that your operating system is up to date (for example, you have installed the most recent service pack).
To install the driver:
- Download the latest drivers from the StarTech.com website (http://www.startech.com/Support). You can find the part number and product ID on the product’s packaging.
Note: Windows will typically save the files to the Downloads folder that is associated with your user account (for example, C:\Documents and Settings\your_name\My Documents\Downloads).
- Once the download is complete, right-click the zip folder that you downloaded, select Extract All, and follow the on-screen instructions.
- Select the appropriate folder for your operating system.
- Double-click Setup.exe.
- Follow the on-screen prompts to install the device drivers and restart the computer when prompted.
- Your computer will automatically complete the driver installation and your device should be ready to use.
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Before you install the device, make sure that your operating system is current (for example, the most recent service pack is installed).
- Download the latest drivers from the StarTech.com website at http://www.startech.com/Support. The part number and product ID are on the product packaging.
Note: Windows usually saves the files to the Downloads folder that is associated with your user account (for example, C:\Users\your_name\Downloads).
- After the download is complete, right-click the zip folder that you downloaded, click Extract All, and complete the instructions.
- Press the Windows key + R, type devmgmt.msc, and press Enter to open the Device Manager.
- Right-click AX88179, which will have a “!” or “?” next to it to indicate a driver issue.
- Click Update Driver.
- Click Browse my computer for driver software.
- Select the Let me pick from a list of device drivers on my computer option.
- On the Select your device’s type from the list below screen, click Show All Devices, and click Next.
Note: The Select your device’s type from the list below screen does not appear on all systems. If you do not see this screen, skip this step.
- Select the Have Disk option.
- Browse to the AX88179\your_operating_system\Manual Drivers\ folder and open the 32-bit or the 64-bit folder, depending on your system type.
Note: To view your system type, click Start. Right-click Computer, and then click Properties.
- Click the Ax88179_178a file. Click OK, and then click Next.
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Before you install the device, make sure that your operating system is current (for example, the most recent service pack is installed).
- Download the latest drivers from the StarTech.com website at http://www.startech.com/Support. The part number and product ID are on the product packaging.
Note: Windows usually saves the files to the Downloads folder that is associated with your user account (for example, C:\Documents and Settings\your_name\My Documents\Downloads).
- After the download is complete, right-click the zip folder that you downloaded, click Extract All, and complete the instructions.
- Press the Windows key + R, type devmgmt.msc, and press Enter to open the Device Manager.
- Right-click AX88179, which will have “!” or “?” next to it to indicate a driver issue.
- Click Update Driver.
- On the Hardware Update Wizard screen, click Install from a list or specific location (Advanced), and then click Next.
- Select the Don’t search, I will choose the driver to install option, and then click Next.
- On the Hardware Type screen, click Show All Devices, and then click Next.
Note: The Hardware Type screen does not appear on all systems. If you do not see this screen, skip this step.
- On the Select the Device Driver you want to install for this hardware screen, select the Have Disk option.
- In the Install from Disk dialog box, click Browse.
- Browse to the AX88179\your_operating_system\Manual Drivers\ folder and open the 32-bit or the 64-bit folder, depending on your system type.
Note: To view your system type, click Start. Right-click Computer, and then click Properties.
- Click the Ax88179_178a file. Click OK, and then click Next.
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-
Download the latest drivers from the StarTech.com website at www.startech.com/Support. The part number and product ID are on the product packaging.
Note: Mac OS X usually saves the files to the Downloads folder that is associated with your user account and is located on the drive where Mac OS X is installed (for example, Macintosh HD\Users\your_name\Downloads).
- Double-click the [ASIX88179] Mac USB Network Adapter.zip file.
- Press and hold the Control key and click the dmg file.
- To mount a drive on the desktop, click Open.
- Double-click the drive that you just mounted on the desktop.
- Press and hold the Control key and click the setup file.
- Click Open.
- Complete the instructions to install the device drivers, and restart your computer when prompted to.
- After your computer restarts, connect the device to your computer.
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How to
StarTech.com does not support a Preboot Execution Environment (PXE) as this requires third-party software. However, our devices can be used as long as the following conditions are met:
- The BIOS must support PXE.
- The BIOS must see the card.
- The environment must have drivers for the chipset used in the card.
- If using a USB networking card, the environment must have support for USB devices as well.
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Virtual local area network (VLAN) tagging requires that the network interface card (NIC) and the router or switch that you use support protocol IEEE 802.1q.
Depending on the NIC, you can set your VLAN ID in Device Manager. Not all NICs that support VLAN tagging have this option.
Setting your VLAN ID in Device Manager
Note: Log in as the local administrator before continuing.
To open Device Manager:
- Press Windows key + R
- Type devmgmt.msc
- Click OK.
- In Device Manager, open Network adapters.
- Right-click on the NIC and choose Properties.
- Click the Advanced tab.
- Scroll down to VLAN ID.
- Set the ID that you would like the NIC to have and click OK.
Setting up your VLAN Tagging and Setting a VLAN ID
How you perform this task depends on your router or switch. Consult the manual or manufacturer of your router or switch for more details.
In your router or switch, you can VLAN tag a device by the VLAN ID if you set one previously, or by the MAC address of the computer. Your router or switch will list all IP devices by MAC address.
For products related to this article, click here.
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To confirm that Windows detects your USB device, complete the following:
- Press the Windows key+R, type devmgmt.msc, and press Enter.
- In Device Manager, under the appropriate heading, confirm that your expansion card is listed and that there isn't an exclamation mark next to it. For example, a USB controller card would be under Universal Serial Bus controllers.
Your USB device is listed according to the name of the chipset. To determine the name of the chipset of your USB device, navigate to www.StarTech.com and look on the Technical Specifications tab for your product.
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To confirm that the Mac OS detects your USB device, complete the following:
- Click the Apple icon.
- Click About This Mac.
- Click More Info or System Report.
- Under the appropriate heading, confirm that your USB device is listed and that there isn't an error. For example, a network card would be under Ethernet Cards.
You may need to refresh the System Information page after you plug in your device. To do so, press Command + R with the System Information page open.
Your USB device is listed according to the name of the chipset. To determine the name of the chipset of your USB device, navigate to www.StarTech.com and look on the Technical Specifications tab for your product.
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Troubleshooting
When you troubleshoot issues with a network adapter, there are some quick tests that you can complete to rule out potential problems. You can test to make sure that the following components are working correctly and are not the source of the issue:
- Ethernet cables
- Network devices
- Computer system
To test your setup components, try the following:
- Use the Ethernet cables, network devices, and computer system in another setup to see if the problem is with the components or the setup.
- Use different Ethernet cables, network devices, and a different computer system in your setup to see if the problem persists. Ideally, you should test a component that you know works in another setup.
When you test your cables, it is recommended that you do the following:
- Test each cable individually.
- Use short cables when you are testing.
When you test the Ethernet cables, network devices, and computer system, it is recommended that you do the following:
- In Device Manager, check under Network Adapters. To open Device Manager, press the Windows key + R, type devmgmt.msc, and press Enter.
- If you are using a USB network adapter and you do not see the network adapter listed in Device Manager, refer to the following FAQ: https://www.startech.com/support/faqs/technical-support?topic=expansion-cards#usb-cannot-detect-windows.
- If you are using a PCI/PCIe network adapter and you do not see the network adapter listed in Device Manager, refer to the following FAQ: https://www.startech.com/support/faqs/technical-support?topic=expansion-cards#pci-pcie-cannot-boot-os-or-detect-windows.
- If you are using a CardBus/ExpressCard adapter and you do not see the network adapter listed in Device Manager, refer to the following FAQ: https://www.startech.com/support/faqs/technical-support?topic=expansion-cards#cb-ec-cannot-detect-windows.
- If the device is listed with an error, follow the instructions on the product page to reinstall the drivers.
- Check to see if your network devices (for example, a network switch, router, and so on) use compatible protocols (for example, 10/100, Gigabit, and so on).
- Make sure that the link LEDs on the adapter are illuminated when it is plugged into a network device. If the link LEDs are illuminated, it means that a good electrical connection exists between the devices.
- If you use a wall jack with an Ethernet cable, make sure that the jack is patched in properly.
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If you are experiencing speed or connectivity issues, it is best to set a specific speed at half or full duplex in your settings. You can set your network adapter to perform at a certain speed, but the device that the adapter is connected to (whether it is a router, switch, or computer) must also be able to perform at the same speed.
Note: You must log in as the local administrator before you continue.
To open Device Manager:
- Press Windows key + R.
- Type devmgmt.msc.
- Click OK.
- Open the Networking adapters section.
- Right-click the network adapter that you want to change and select Properties.
- Click the Advanced tab.
- Scroll down to Speed & Duplex. By default, it is set to Auto-Negotiate. Select any of the speeds that you see in the list.
- Click OK and restart your computer.
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If the USB device does not work after your computer has been in extended hibernation, it is likely that Windows has automatically turned off the USB Root hub to save power.
The steps below outline how to configure the USB root hub to stay on during hibernation, to prevent this from happening.
Windows 10 / 8
- On your keyboard, press the Windows key + X and select Control Panel.
- Click Hardware and Sound, then click Power Options.
- Click Change plan settings for the plan you want to change.
- Click Change advanced power settings.
- Click the plus sign (+) next to “USB settings” and “USB selective suspend setting” to expand the options and change the setting to Disabled.
- Click OK to apply the setting.
Note: You may need to disconnect and re-connect your USB device after applying these settings to re-establish the connection.
Windows 7 / Vista
- Click the Start button and select Control Panel.
- Click Hardware and Sound, then click Power Options.
- Click Change plan settings for the plan you want to change.
- Click Change advanced power settings.
- Click the plus sign (+) next to “USB settings” and “USB selective suspend setting” to expand the options and change the setting to Disabled.
- Click OK to apply the setting.
Note: You may need to disconnect and re-connect your USB device after applying these settings to re-establish the connection.
Windows XP
- On your desktop, right-click the My Computer icon and select Properties.
- Click the Device Manager tab.
- Expand Universal Serial Bus controllers by clicking the arrow to the left of it.
- Right-click the first USB Root Hub device and select Properties.
- Click the Power Management tab.
- Clear the box next to Allow the computer to turn off this device to save power.
- Click OK to apply the setting.
- Repeat steps 4-7 for any remaining devices in the Universal Serial Bus Controllers section with “Root Hub” in the name.
Note: You may need to disconnect and re-connect your USB device after applying these settings to re-establish the connection.
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* Product appearance and specifications are subject to change without notice.
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