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TICKET ARCHIVE -> D-link 300t Dsl & Airport Express Problems

jmann - Aug 3, 2005 - 5:36 am

Hi, You guys are my last resort. I recently purchased a D-Link 300T modem and Airport Express so that I might have wireless at home.I have yet to get it working. I have spent 3 hours on the phone to Apple Support, made two appointments at the Genius bar at the Apple Store and spent a total of 5 hours there, 1 1/2 hour talking to D-Link, and 1 hour talking to my ISP Pipex. I am ready to give up and either get a different wireless router, or go back to hard wired DSL service.

I have followed the instructions of everyone on set up, and am an expert at the hard reset, starting over of both the Modem and the Airport Express. Both have been tested, and exchanged. Yet the error I continue to get is-

81.178.70.130 in use by 0:11:24:ea:23:82, DHCP Server 192.168.1.1

What happens is that I get kicked off line, this error comes up, then I get on again about a minute later. Very difficult to upload pictures to work when this keeps happening.

When this happens the airport express light goes from continuous green to blinking amber. Can you guys help? Thanks - Jessie

marcusr - Aug 3, 2005 - 8:40 am

Hi Jessie,

The place to start is to run through the settings and try and work out what is conflicting.

Firstly, where do you see the error that you report - is it a pop-up on the Mac, in a system log, in a router log, or somewhere else?

What's also very suspicious is that your external IP address is being reported - that's the 81.178.70.130 address.

Also, if you connect the computer directly by ethernet cable, bypassing the Airport Express, does it work?

I'll run through how it should be set up, and maybe you can spot anything different to your current setup.

The ADSL modem will connect to the PIPEX network and will have an IP address of 81.178.70.130 on the 'outside' of the network, on the telephone line side.

On your own network, you will be using a private IP address range such as 192.168.1.1.

The modem will then perform what's known as Network Address Translation (NAT), which shares the one external IP address with all your internal IP addresses, mapping between them. This is very handy to have, as it provides a strong firewall between your network and the internet, and lets you connect as many machines as you want to your network, which can all see the internet.

This is why I'm suprised to see an error referencing your external IP address - that should be hidden from any machine on the network.

On the Mac, open System Preferences and the Network option, and select each of the network types in turn (ethernet, airport). Select the TCP/IP tab, and make sure it's set to Obtain IP address by DHCP. I'm thinking perhaps you used to use a USB ADSL modem and the IP address is still in there.

If you can connect without problems when you use an ethernet cable, but the problem occurs only when using the Airport Express, we can focus there.

For that, I need to know the settings you have put into the Airport Express. Can you run the Airport admin utility and let me know the settings you have chosen? The following screenshot shows the screens of interest.

http://www.tomsnetworking.com/Review...REXPRESS-5.php

Marcus

jmann - Aug 3, 2005 - 12:30 pm

Thanks Marcus- I am going to answer your questions as much as I can, then I will head home where I can look and make your suggestions on my system.

1) That error is a pop up on my Mac PowerBook.

2) Yes, the D-Link 300T DSL works connected directly to the computer, no problem.

3) Yes, I did use a USB ADSL modem before purchasing the d-link modem.

4) I will let you know the settings from the admin utility as soon as possible.

Thanks again for all your help- You have given me a little bit of hope.

KR-
Jessie

jmann - Aug 3, 2005 - 2:26 pm

Marcus- I have the screen shots for you of my preferences. Both ethernet and Airport connect using DHCP. I have tried to use the Admin Utility, but it doesn't seem to be finding my airport. Actually it flashes there and then gone. The light is flashing amber, but I am still connected to my network according to the status bar for the airport in the upper left hand corner of the screen. Do you know what is going on?

marcusr - Aug 3, 2005 - 3:07 pm

Hi,

Can you send your screen shots to me directly - my email is

osx@marcusr.org.uk

and I'll take a look.

How long does it take after you start using the laptop does the error message appear, and is it thhe same length of time each time?

I'm sure we can get to the bottom of this!

Marcus

marcusr - Aug 3, 2005 - 3:48 pm

Hello again,

I forgot to say, I think the problem is a conflict in settings between the Airport and the ADLS modem. To get the Airport admin to run, switch off the ADSL modem and restart your Powerbook. You should then be able to run the admin utility.

Marcus

marcusr - Aug 3, 2005 - 4:15 pm

Hello,

Sorry, me again :-)

Could you run Terminal (in Finder, Shift-Apple-U to open the Applications/Utilities folder, and then run Terminal)

at the command line, type:

arp -a

and could you copy and paste the output to me.

Thanks

Marcus