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FS#3986 - Autonegotiation stopped working #8981

openwrt-bot opened this issue Aug 22, 2021 · 0 comments

FS#3986 - Autonegotiation stopped working #8981

openwrt-bot opened this issue Aug 22, 2021 · 0 comments


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openwrt-bot commented Aug 22, 2021


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.

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