Link to home
Start Free TrialLog in
Avatar of Richard Christensen
Richard Christensen

asked on

unable to get an IP address with D-Link wireless router

I have configured the D-Link wireless DI-524 router according to the directions.  It is a DSL modem so I have selected PPPoE.  Also, I have configured the laptop for encryption using WEP.  All of the wiring is as directed.  The phone line connects to the DSL modem.  ethernet runs between the DSL modem and the router.  The standalone desktop computer is connected to the router by ethernet.  The ISP connection is working because the stand-alone computer accesses internet OK when it is connected directly to the DSL modem.  For some strange reason, the laptop cannot get an IP address.  I have configured the wireless card in the laptop.  Any ideas would be appreciated.  I have the same router working successfully in my office at home.  Thanks,
capreol
ASKER CERTIFIED SOLUTION
Avatar of CKWT
CKWT
Flag of Honduras image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Is your DSL modem in Bridged mode? I mean, who gets the dynamic ip from the ISP? DSL Modem or Router. Make it to router and you're all set.

Cheers,
Rajesh
Avatar of Rob Williams
Rather than re-doing the WEP configuration, remove all wireless encryption and filtering. Best to set up the wireless this way, keeping it simple, and then gradually add security features. If your desktop computer gets an address with DHCP the wireless will likely too, but encryption, non standard channels etc., may be blocking it.
If it is not a problem with the wireless coniguration. then try to reset, turn off all devices then turn them on starting with the modem then with d-link router, MAKE SURE TO WAIT TILL IT GETS ITS CONFIG. then connect the desktop computer into d-link then try wireless. also make sure the router is configured to be the gateway and the dhcp is enabled.

hope this helps!
Avatar of hfern
hfern

> The ISP connection is working because the stand-alone computer accesses internet OK when it is connected directly to the DSL modem.
So you do have an Internet connection when you hook up the ADSL modem directly to the Internet.. But do you have a connection if you have the connection from the computer via the router to the Internet? If this works then you have just a problem in the wireless side. In that case I agree with RobWill: remove the WEP encryption and filtering and see if it works. Then slowly add the security filters. Typically if the WEP key is wrong or the MAC filter does not match, you will see a connection from the laptop, but the laptop will not be able to obtain an IP address.

If the PC also does not connect via the router then we need to further breakdown the problem:
1. Do you have a connection from the router to the Internet: login into the router and see if you the WAN connection is operational
2. Is DHCP enabled on the router? Do you see the lease of the PC?
3. Is MAC address filtering enabled? You may want to turn this off until you have a proper connection working.

Hope this helps.



Well, if things do not work out for you, I have detailed a troubleshooting approach to see if you get connectivity when setting a static ip address as opposed to a Dynamic one (DHCP), and turning off any WEP Securtiy for the sake of testing. Once you can verify conenctivity then you should optimize your security / ip address allocation.

1. Look at the TCP/IP Settings on the computer connected to your router via Ethernet (hard wired). To view it type the following command:

(Windows) Start menu --> Run --> cmd --> ipconfig/all

It will retuern youtr TCP/IP info.
The key information you will want to record is:
(These numbers are made up but you should see the pattern)
IP Address: 10.1.1.2
Subnet Mask: 255.255.255.0
DNS: 10.1.1.1
GateWay: 10.1.1.1


Now you know the address details to get connectivity to the router, you can make some changes, with a small bit of knowledge that I will give you now.

IP Address / Subnet Combo.
Notice the IP Address has the same sets as the subnet mask; four sets of numbers. The 255 in the subnet mask represents what part of the ip address is the Network ID, and the 0 represents the Host ID.

DNS.
Humans remember computer addresses on the internet by domain names. Computers use ip addresses. When you enter a domain name into Internet Explorer for example, your computer will contact a DNS server on the internet and ask "what is the ip address of expertexchange.com, the DNS server will respond, you can get to it by going to 64.156.132.140

Gateway.
The Gateway is used to find ip addresses that are not on your network. So when you enter experts-exchange.com into Internet Explorer, you receive an ip address from the DNS server, then your computer compare that address to your own and in this case, send the request to be handled by the default Gateway; i.e. NAT usually.


Now with the ip address scheme that was returned by the hardwired computer.

IP Address: 10.1.1.2
Subnet Mask: 255.255.255.0
DNS: 10.1.1.1
GateWay: 10.1.1.1

We can put the same settings into the wireless card of the laptop but change the host id of the ip address. So if we gave it the host id of 10, we would get the following.

IP Address: 10.1.1.10
Subnet Mask: 255.255.255.0
DNS: 10.1.1.1
GateWay: 10.1.1.1

And would allow connectivity. Once you can connect to the internet, then do your optimisations with WEP and DHCP; it can be a good idea with DHCP to organise what they a reservation, so the laptop always gets the same ip address, this can be handy if you have ports mapped to your computer for certain programs.


A computers network settings can usually be adjusted via (Windows) Control Panel --> Network Connections. Record current settings before making changes to the ip address settings. If you do not get it complete in one night, set your laptop back to settings that will connect you to the office again.
capreol,
any feedback
First of all, make sure you laptop's wireless is turn on. Most people including myself forget there's a on/off switch on the laptop. Then on view all available wireless network to look for your SSID then enter your WEP key.