---
title: "WIZ811MJ (W5100) - implement TCP on software layer using IPRAW Socket mode"
url: "https://maker.wiznet.io/forum/13111"
markdown_url: "https://maker.wiznet.io/forum/13111/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "zbigelpl"
created: "2018-11-12T00:02:40+09:00"
last_activity: "2018-11-12T19:53:35+09:00"
language: "en"
views: 483
replies: 2
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# WIZ811MJ (W5100) - implement TCP on software layer using IPRAW Socket mode

## Question

Asked by zbigelpl on 2018-11-12 in Ethernet Chips.

Hi,

Is it possible to handle TCP stack on sotfware/firwmware layer (outside the W5100) in case enabling IPRAW mode for socket in W5100? Does TCP stack implemeted on W5100 is deactivated in case IPRAW mode enabled?

## Replies

### Reply 1 by becky, 2018-11-12

Hello,

In case that in open socket in IPRAW mode,
socket doesn’t handle the TCP stack.
It is handled by your SW.

### Reply 2 by zbigelpl, 2018-11-12 (in reply to reply 1)

Thanks. This what I wanted to hear;).

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Source: https://maker.wiznet.io/forum/13111