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Jumbo Frame Support in CalDigit USB-C Dock

Jumbo Frame Support in CalDigit USB-C Dock

Products Affected:

USB-C Dock

Jumbo Frames are Ethernet frames that can carry more than 1500 bytes of payload. CalDigit USB-C Dock can support two jumbo frame configurations – 2 KB and 4 KB.

To enable Jumbo Frames for the USB-C Dock in macOS:

  1. From the Apple menu, choose System Preferences.
  2. Click Network.
  3. In the left sidebar, select “CYUSB3610” for your CalDigit USB-C Dock.
  4. If you see a lock icon in the bottom left corner, click the lock icon and enter your administrator password.
  5. Click the “Advanced…” button.
  6. Click the Hardware tab.
  7. From the Configure: pop-up menu, choose “Manually”.
  8. From the MTU pop-up menu, choose “Custom” then enter 4088.
  9. Click OK, then click Apply to save your changes.

To test Jumbo Frame in macOS:

  1. Go to Terminal Application.
  2. Type in the command: ping -D -s 4060 [Your destination IP] , then hit enter. You will see around 4000 bytes back from destination machine.

To enable Jumbo Frames in Windows:

  1. From Windows Device Manager, choose Network Adapters.
  2. Right-click on Cypress GX3 SuperSpeed to Gigabit Ethernet Bridge Controller and select Properties.
  3. Click on the Advanced tab. Under Property drop-down list, select Jumbo Packet.
  4. Select the Jumbo frame size value from the drop-down list (Disabled, 2KB, or 4KB).

Note: Your Gigabit Ethernet Switch, Destination Machine and OS must support jumbo frames.

Additional Information: Jumbo Frame Support in CalDigit Thunderbolt Docks

Wikipedia: Jumbo Frame

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