[X4U] Airport Express/iMac/iPad network issues

[Paul Moortgat]

Hi Andrew,

I need to select the Airport option in Network if I want to use Wifi  
on the iPad.  It used to work until a few days ago.  It's an iPad 3G 
+Wifi.
The Airport Extreme is a card inside the iMac.  Unfortunately I can't  
send screen dumps to this group.  I can send them to you off line.
I also use DHCP but the address starts with 169....  Renew doesn't help.
1) Where do I find the airport's WAN?
2) The airport's LAN is 00:1c:c2:a4:40:09  (or is this wrong?)
3) Yes
4) Yes

Paul Moortgat

On 12 Oct 2010, at 20:50, Andrew Lynch wrote:

> Hi Paul,
>   I'm a little confused by this statement:
>
> "I got for a few days now a "Self-assigned IP address" message when  
> I select the Airport Extreme in our iMac to use it to connect the  
> iPad 3G."
>
> My ipad connects directly to the airport extreme, without  
> interaction with my iMac.  Can you perhaps rephrase your statement?
>
> Are you setting the LAN address of the airport to 192.168.0.1, or  
> the WAN address?  You probably need to leave the WAN address alone,  
> that address should come from your internet provider.
>
> I don't have my setup in front of me, but, in a nutshell, My  
> internet service provider (ISP) uses DHCP to provide a WAN address  
> to my airport extreme.  My airport extreme in turn uses DHCP to  
> provide LAN addresses to the devices inside my network.  Each device  
> is set to use DHCP to get an ip address.
>
> So, try to answer these questions:
> 1) Where does your airport get it's WAN (outside address)?
> 2) What is your airport's LAN (inside) address?
> 3) Is your airport extreme set to provide DHCP addresses to the  
> devices inside your network?
> 3) Are your inside devices set to use DHCP to get addresses?
>
> Clue: LAN addresses usually start with 192.168. or 10.0.
> Clue2: The airport extreme has a WAN address and a LAN address. It's  
> LAN address is usually 192.168.0.1 or 10.0.0.1.  The WAN address is  
> assigned by your ISP.
> Clue3: Two devices on the same network cannot have the same  
> address.  For example, if your Airport Extreme's LAN address is  
> 192.168.0.1, your ipad and imac should use 192.168.0.2 and  
> 192.168.0.3 (or some other address on the same 192.168.0. subnet).
>
> Clear as mud I'm sure......
>
> Good Luck,
>   Drew
>
>
> -- 
> --
> Andrew T. Lynch