---
title: "W850io Autonegotation Problem"
url: "https://maker.wiznet.io/forum/13329"
markdown_url: "https://maker.wiznet.io/forum/13329/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "Guido Jaeger"
created: "2019-05-20T05:32:27+09:00"
last_activity: "2019-05-21T00:37:43+09:00"
language: "en"
views: 463
replies: 2
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# W850io Autonegotation Problem

## Question

Asked by Guido Jaeger on 2019-05-20 in Ethernet Chips.

Hello,

not the first one with this Problem…using a Wiz850io (W5500 based ).
Based on the Schematic the Module is set to Autonegotation ON.
Using a Cisco - Switch (SG-200-26) i dont get a LinkUp until i set the used Port manuall to 100MBit.

Reading the PHYCFGR i can see that OPMD is 0 (= use HW Pins )
Manual settings this to 1 and OPMDC to 111 also gives no Change.

No way to get it working using Autonegotation. Any Ideas ?

Greetings
Guido

## Replies

### Reply 1 by Guido Jaeger, 2019-05-20

SOLVED !!
Really great if you use professional Equipment like a Cisco SG200.

Problem was only the Switch Firmware. But you cant download and update to the actuall Version,
in my Case i must update to 1.3.7.18.ros , then to 1.4.1.0.3 (actuall Version ).

Now all is working !!

Greetings

Guido

### Reply 2 by scott, 2019-05-21 (in reply to reply 1)

Good ![:grinning:](https://emoji.discourse-cdn.com/twitter/grinning.png?v=12)

Have a nice day!

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Source: https://maker.wiznet.io/forum/13329