---
title: "عدم تشخیص قطع ارتباط توسط w5500"
url: "https://maker.wiznet.io/forum/14092"
markdown_url: "https://maker.wiznet.io/forum/14092/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "mbg"
created: "2020-12-16T19:09:28+09:00"
last_activity: "2020-12-18T00:12:31+09:00"
language: "en"
views: 414
replies: 3
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# عدم تشخیص قطع ارتباط توسط w5500

## Question

Asked by mbg on 2020-12-16 in Ethernet Chips.

سلام.من w5500 را بعنوان یک سرور پیکربندی کرده ام و از طریق یک کلاینت به ان متصل میشوم .مشگل من این هست که در صورت قطع کابل شبکه ,w5500 قادر به تشخیص ان نیست و در حالت stablished می ماند …لطفا راهنمایی کنید

## Replies

### Reply 1 by irina, 2020-12-17

Could you ask the question again using English, please?

### Reply 2 by mbg, 2020-12-17 (in reply to reply 1)

Hi
I configured socket number 2 of w5500 as tcp/ip server and connected with a windows client to it. The connection is well established and it works well. However when the session is disconnected for every reason such as cable disconnecting, w5500 can not recognize it and the connection remains established. Therefore server can not understand the connection request of client again. i would highly appreciate you if you help me solve this problem

### Reply 3 by irina, 2020-12-18

I think you posed the same question one more time. Please refer to the answer link.

[W5500 can not recognize session has been disconnected in the server mode](https://forum.wiznet.io/t/topic/8250/2) [W5500](https://maker.wiznet.io/c/tcp-ip-chip/w5500/18)

> W5500 already has timeout mechanism. timeout is occur by RTR/RCR register. At the TCP packet retransmission timeout, W5500 transmits TCP packets(SYS, Data packets) and wait for ACK during the configured RTR and RCR time. If it is no ACK from the peer, a temporary timeout occurs and the TCP packet is retransmitted. [image] Therefore, when the network is disconnected for every reason such as cable disconnecting, W5500 will close the socket by timeout.

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Source: https://maker.wiznet.io/forum/14092