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.
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

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

Affected Platforms:
Dell Pro Rugged 13 RA13250Dell Pro Rugged 14 RB14250
Cause
Packet errors may occur due to clock misalignment causing intermittent connection lag.
Resolution
Main Ethernet port: Intel(R) Ethernet Connection (18) I219-LM
- Update Intel LAN driver to version
20.0.3.24or newer.
Second Ethernet port: Realtek USB GbE Family Controller.
Update the firmware using the Realtek LAN RX Parameter Modification Tool v2.0.29
- Download the One-Click Tool from the Dell Drivers Site and extract file.

- Launch PatchTool.exe and click Patch button.

- Click OK button.

- Click OK button.
