---
title: "Auto Negotiation not working correctly"
url: "https://maker.wiznet.io/forum/13666"
markdown_url: "https://maker.wiznet.io/forum/13666/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "Jimbee"
created: "2020-01-21T17:05:16+09:00"
last_activity: "2020-10-08T12:39:11+09:00"
language: "en"
views: 1488
replies: 2
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# Auto Negotiation not working correctly

## Question

Asked by Jimbee on 2020-01-21 in Ethernet Chips.

Hello,

I am using the Adafruit Ethernet FeatherWing board using your W5500 chip. The board is connected to my network via a NetGear Gigabit Hub. I am having issues with the auto-negotiation not working correctly all the time. It sometimes negotiates at 100Mb but most of the time it negotiates at 10Mb. I am using the LED’s on the Hub for the speed negotiated with the hub.

Thanks,
Jim

## Replies

### Reply 1 by Eugeny, 2020-01-22

Look into the logs of the hub if it has these. Change cable. Change hub. Change Ethernet board. If problem remains then configuration of W5500 or hub/switch is incorrect. If problem will disappear then most probably last changed device is the problem.

### Reply 2 by ZsZs, 2020-10-08

Did you connect the RST pin of your FeatgerWing board to your MCU?
Check the datasheet of W5500 how to **properly reset** W5500 after power on.

In case you did proper reset then this could help: [W5500 No PHY Link - #22 by ZsZs](https://forum.wiznet.io/t/topic/2614/22)

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Source: https://maker.wiznet.io/forum/13666