---
title: "Sn_IR_SENDOK received but data not sent immediately"
url: "https://maker.wiznet.io/forum/14114"
markdown_url: "https://maker.wiznet.io/forum/14114/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "johnthesoftware"
created: "2021-01-08T13:43:35+09:00"
last_activity: "2021-01-08T13:43:35+09:00"
language: "en"
views: 325
replies: 0
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# Sn_IR_SENDOK received but data not sent immediately

## Question

Asked by johnthesoftware on 2021-01-08 in Ethernet Chips.

Hi,
I’m putting together an Arduino DHCP bootloader for the 5500. It works fine but on boot the initial DISCOVER packet is not sent immediately after the Sn_IR_SENDOK is received. It’s sent after about 10 seconds and I can see that the Link Status bit changes from 0 to 1 at about 5 seconds but even then it takes a while for the packet to be seen on Wireshark. After this everything clicks into place.

Is this behaviour expected? I have explicitly set OPMDC to 100T/Full/Auto-Disabled.

Thanks

John

---

Source: https://maker.wiznet.io/forum/14114