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Beijer

Member Since 19 Sep 2010
Offline Last Active Dec 02 2011 07:25 PM

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Posts I've Made

In Topic: Common solution to current limitations?

01 May 2011 - 06:14 AM

I don't have any good knowledge about elctronics but i'm learning.
Maybe this two are something you can use (There were someone on this forum that posted them):
http://digital-diy.c...-n-channel.html
http://digital-diy.c...-p-channel.html

Maybe they are something you can use.

In Topic: Where to buy?

08 November 2010 - 04:21 PM

Hi... I live in the US, so I bought mine from MakerShed... but, I stumbled across this site while looking.

http://www.coolcompo...products_id=559

It's UK based, and seems to have a fair price.

As it is now, i can't recomend there site.
I live in Sweden and they sent me one at october the 11th and it have not arrived yet.

In Topic: DHCP - getting different IP address each time I restart

07 November 2010 - 08:35 AM

I have tried to forge custom packets for the whole DORA process using Wincap and a library called scarpcap to make it work in c# and I can tell you there are alot of things in the packets to make sure that they are not manipulated

Thats why I like Wireshark so much for packet capturing becouse it tells me if the packet is malformed and what is wrong.

In Topic: DHCP - getting different IP address each time I restart

06 November 2010 - 11:38 AM

Hi,

maybe I found the problem. When switching on the Netduino Plus I get following DHCP request:

1) DISCOVER with YourIP 0.0.0.0
2) Reply from my DHCP server with OFFER and IP address 192.168.178.96
3) REQUEST with YourIP still 0.0.0.0 instead of the offered IP 192.168.178.96
4) Reply with ACK

When comparing i.e. with Thaoe-II I have a difference with the step 3, the YourIP and ServerIP is filled correct instead of using 0.0.0.0.

I have attached the capture of both requests.

Michael

I don't really know how to tell this but I will give it a try.

The step 3 when it sends out a request should be 0.0.0.0 for a device that have never got an ip adress before. It will send it as a broadcast so that all the dhcp servers on the network will know about it.

The reason why the Thaoe will send it it's ip adress I don't know but as far as i know the whole DORA process is with Boradcast (Except when there is only a renew, and not a release renew)

I would really like to see the captures with wireshark though.