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Table of Contents
? Check Network Adapter and Switch Compatibility
?? Enable Jumbo Frames via Device Manager
? Verify Jumbo Frames Are Working
? Notes and Best Practices
Home System Tutorial Windows Series How to enable jumbo frames for a network adapter in Windows

How to enable jumbo frames for a network adapter in Windows

Aug 03, 2025 pm 01:03 PM
network adapter 巨型幀

To enable the jumbo frame of the Windows Network Adapter, you must first confirm the hardware support, and then set up and verify the configuration in Device Manager. 1. Make sure that both the network adapter and switch support jumbo frames and configure the same MTU (such as 9014 bytes), otherwise it may lead to packet loss or performance degradation. 2. Right-click the network adapter properties in Device Manager, go to Advanced Options, find Jumbo Packet, Jumbo Frame, or similar options, and set its value to 9014 or 9088 (for Gigabit Networks). 3. After setting, the connection may be temporarily disconnected, and then run the command prompt through the administrator permissions to execute netsh interface ipv4 show subinterfaces to check whether the MTU is effective. 4. Use the ping -f -l 8972 target IP command to test. If successful, it means that the jumbo frame is working normally. If it prompts "Shaving is required but DF is set", there are devices in the path that do not support large packets. 5. Pay attention to updating the network card driver to ensure that this function is supported. Wi-Fi usually does not support it. In the virtualized environment, it is necessary to ensure that the virtual switch also enables jumbo frames, and all MTUs in the same layer one and second network should be consistent, ultimately achieving the purpose of reducing CPU overhead and improving throughput performance.

How to enable jumpo frames for a network adapter in Windows

Enabling jumbo frames on a network adapter in Windows can improve network performance by allowing larger packet sizes, which reduces CPU overhead and increase throughput—especially useful in high-performance networks like file servers, NAS, or virtualization environments. However, all devices on the same network path (switches, routers, other adapters) must support and be configured for jumbo frames , or you'll experience connectivity issues or fragmentation.

How to enable jumpo frames for a network adapter in Windows

Here's how to enable jumpo frames:


? Check Network Adapter and Switch Compatibility

Before making changes:

How to enable jumpo frames for a network adapter in Windows
  • Confirm your network adapter supports jumbo frames (most modern Gigabit and 10-Gigabit NICs do).
  • Verify your network switch or router supports jumbo frames and is configured for the same MTU (eg, 9014 bytes).
  • Mismatched MTU settings can cause black-hole packet loss or severe performance degradation.

Example: If your PC has jumbo frames enabled but the switch doesn't, large packets get dropped silently.


?? Enable Jumbo Frames via Device Manager

  1. Press Win X and select Device Manager .
  2. Expand Network adapters .
  3. Right-click your network adapter (eg, "Intel(R) Ethernet Connection I219-V") → Properties .
  4. Go to the Advanced tab.
  5. Look for a property named:
    • Jumbo Packet
    • Jumbo Frame
    • Jumbo MTU
    • Large Packet Receive (Name varies by manufacturer)
  6. Select it, then choose a value from the Value dropdown:
    • Common options: 1514 , 4074 , 4088 , 4096 , 9014 , 9088 bytes
    • For Gigabit Ethernet, 9014 or 9088 is typical.
    • Avoid setting higher than your switch supports.
  7. Click OK .

?? You may lose connection briefly as the adapter resets.

How to enable jumpo frames for a network adapter in Windows

? Verify Jumbo Frames Are Working

Open Command Prompt as Administrator and run:

 netsh interface ipv4 show subinterfaces

Look for your network interface. The MTU column should reflect your setting (eg, 9000). If it still shows 1500, the adapter or driver doesn't support it, or the setting didn't apply.

You can also test with a ping using a large packet:

 ping -f -l 8972 192.168.1.100
  • -f = Don't fragment flag
  • -l 8972 = Payload size (8972 28 header = ~9000 total)
  • Replace 192.168.1.100 with a known jumbo-frame-enabled device.

If the ping successes, jumpo frames are working. If you get "Packet needs to be fragmented but DF set," something in the path is blocking large packets.


? Notes and Best Practices

  • Driver matters : Outdated drivers may not expose jumpo frame options. Update your NIC driver from the manufacturer.
  • Wi-Fi adapters typically don't support jumpo frames.
  • Virtual machines : If using VMs, ensure virtual switches (eg, in Hyper-V or VMware) also supports and pass through jumpo frames.
  • MTU consistency : All devices on the same Layer 2 segment should use the same MTU.

Basically, enabling jumbo frames is straightforward in Windows—if your hardware supports it. Just go to the adapter's advanced properties, set the jumbo frame size, and verify with ping tests. The key is ensuring end-to-end compatibility.

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