Intermittent or Failed Ethernet Connectivity on Primary and Secondary Ports on Dell Pro Rugged Systems

Summary: This article provides guidance on resolving Ethernet port connectivity issues on Dell Pro Rugged systems.

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.

Symptoms

The primary and secondary Ethernet ports may experience the following issues when the network resumes from power-saving mode:

  • Webpages are loading slowly.
  • The file transfer is incomplete.
  • The Internet connection is intermittent lost.

Main Ethernet port: The Intel I219-LM Ethernet experiences connection delays when exiting low-power mode.

Device Name: Intel(R) Ethernet Connection (18) I219-LM

 

Intel(R) Ethernet Connection (18) I219-LM

 

Second Ethernet port: The Realtek USB Ethernet adapter experiences Request timed out, or Destination host unreachable while in Idle Power-Saving mode.

Device Name: Realtek USB GbE Family Controller

 

Realtek USB GbE Family Controller

 

Affected Platforms:

  • Dell Pro Rugged 13 RA13250
  • Dell Pro Rugged 14 RB14250

 

Cause

Packet errors may occur due to clock misalignment causing intermittent connection lag.

 

Resolution

Note: Do not create a work order for any hardware replacement for this issue.

 

Main Ethernet port: Intel(R) Ethernet Connection (18) I219-LM

  • Update Intel LAN driver to version 20.0.3.24 or newer.

Second Ethernet port: Realtek USB GbE Family Controller.
Update the firmware using the Realtek LAN RX Parameter Modification Tool v2.0.29

  1. Download the One-Click Tool from the Dell Drivers Site and extract file.

    unzip file

  2. Launch PatchTool.exe and click Patch button.

    PatchTool

  3. Click OK button.

    OK button

  4. Click OK button.

    OK button

 

Affected Products

Dell Pro Rugged 13 RA13250, Dell Pro Rugged 14 RB14250
Article Properties
Article Number: 000470363
Article Type: Solution
Last Modified: 03 Jul 2026
Version:  3
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