---
title: "WIZ750SR only 10Mbps-half"
url: "https://maker.wiznet.io/forum/15283"
markdown_url: "https://maker.wiznet.io/forum/15283/md"
type: "Forum topic"
category: "Serial-to-Ethernet & ConfigTool"
author: "bdempsey64"
created: "2018-04-14T01:47:06+09:00"
last_activity: "2018-04-23T14:01:18+09:00"
language: "en"
views: 661
replies: 2
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# WIZ750SR only 10Mbps-half

## Question

Asked by bdempsey64 on 2018-04-14 in Serial-to-Ethernet & ConfigTool.

I’m trying to get my WIZ750SR to link up at 100Mbps/full duplex, but it only ever seems to link at 10Mbps/half. It is connected to a Cisco 2950.

Is there a command I can enter to do this, or should I try forcing the port to 100/full?

## Replies

### Reply 1 by irina, 2018-04-23

Hi bdempsey64,

![](https://avatars.discourse-cdn.com/v4/letter/b/87869e/48.png) bdempsey64:

> it only ever seems to link at 10Mbps/half.

What firmware version of the WIZ750SR are you using?

For firmware versions prior to v1.1.0, there was a bug where the Ethernet link was fixed at 10M, but it was fixed in v1.1.1. Therefore, if you use the latest firmware, it will work well.

Since the WIZ750SR has various function changes due to the version update, **if you are using v1.2.0 or earlier, please perform the firmware update through the W7500x ISP tool by the following guide below.** (have to use **WIZ750SRv1xx_incl_Boot.bin** file for **W7500x ISP tool**)

> **Guide: WIZ750SR Flash Programming using WIZISP Tool**
> <https://wizwiki.net/wiki/doku.php?id=products:wiz750sr:developers:start#flash_programming_using_wizisp_tool>

![](https://github.githubassets.com/favicons/favicon.svg) [GitHub](https://github.com/Wiznet/WIZ750SR/releases)

![](https://maker.wiznet.io/forum_uploads/wiznet/original/2X/f/fcf4a18ad49c521008b51b6779240a21f7b44cf2.png)

### [Releases · Wiznet/WIZ750SR](https://github.com/Wiznet/WIZ750SR/releases)

WIZnet Serial to Ethernet(S2E) module based on W7500 chip, WIZ107/108SR S2E compatible device - Wiznet/WIZ750SR

After the firmware update, please use the new configuration tool. New tools can be downloaded from the link below.

![](https://github.githubassets.com/favicons/favicon.svg) [GitHub](https://github.com/Wiznet/WIZnet-S2E-Tool-GUI/releases)

![](https://maker.wiznet.io/forum_uploads/wiznet/original/2X/d/d5d870137a8aa9e510fbabf6b7a04f32b3f7a2d7.png)

### [Releases · Wiznet/WIZnet-S2E-Tool-GUI](https://github.com/Wiznet/WIZnet-S2E-Tool-GUI/releases)

GUI Configuration tool for WIZnet serial to ethernet devices. - Wiznet/WIZnet-S2E-Tool-GUI

### Reply 2 by bdempsey64, 2018-04-23

That fixed it. Thanks. All working fine now.

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Source: https://maker.wiznet.io/forum/15283