[FS#3987] Autonegotiation stopped working

OpenWrt Bugs openwrt-bugs at lists.openwrt.org
Sun Aug 22 04:27:46 PDT 2021


A new Flyspray task has been opened.  Details are below. 

User who did this - Technocrat (Technocrat) 

Attached to Project - OpenWrt/LEDE Project
Summary - Autonegotiation stopped working
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - Supply the following if possible:
 - Device problem occurs on ASUS RT-AC65P
 - Software versions of OpenWrt 21.02.0-rc3
 - Plug WAN port with two-pair cable of an ISP (100Mb/s)
Execute cmd:
ethtool wan 

 Speed: 1000Mb/s
 Duplex: Full
The connection is not working due to the incorrect speed.

Connect the same cable to a switch, and then the router to the same switch. Or execute the command:
ethtool -s wan speed 100 autoneg off duplex full 
After that the connection is properly established with proper speed:
ethtool wan 

 Speed: 100Mb/s
 Duplex: Full

Autonegotiation was working properly about a year and a half ago, so there was some changes made in the code that affected it. It also working with no issue with stock firmware.

More information can be found at the following URL:

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