Microsoft loopback adapter

[saleen31]

I am trying to set up a computer for someone to access our school network. The laptop has a microsoft loopback adapter installed and it is set to obtain an ip and dns server address automatically. The problem is that the adapter will not pull an IP address from the network. When I run ipconfig, it says the autoconfiguration ip is: 169.x.x.x. 169 is not what the network uses. I try to release the ip and it does not release, it stays at 169.x.x.x. So i try to renew, and it says: unable to contact your DHCP server. Request timed out. I have no clue on how to get this thing to pull an ip. I'm not sure, but I don't think that this loopback adapter is an actual nic. Is it like drivers that are added to some nic? I really don't know. This is an onboard nic and the laptop is a Toshiba Satellite 1715XCDS with XP pro, 600mhz and of 64megs ram. Any help on this is appreciated.
Thanks
Bob

[cat5e]

The Microsoft Loop back adapter is a tool for testing in a virtual network environment where access to a network is not feasible. I.e. there is no real physical connection.

169. xxx.xxx.xxx means that the computer does not have a connection to DHCP server and thus can not obtain an IP. You should check with the IT people to find out how their system is set.

[Midknyte]

169.254.x.x is APIPA. that means your tcpip stack is working properly. your problem is your physical connection to the network, or that there is no dhcp server on the network.

[saleen31]

ok so since the only adapter present in the device manager is the loopback adapter does that mean the nic is not installed properly?

[Midknyte]

if you don't have a nic installed, then that's probably the problem. :rolleyes:

loopback is just to test the functionality of the port.

[kwebb]

Unless you've done something very funky, the loopback adapter will have a 127.X.X.X address. It wouldn't use a APIPA IP. What OS are you using?

[Midknyte]

that's what I was thinking too. loopback in windows is usually 127.0.0.1. there is a loopback device installed instead of a regular nic, so that needs to be fixed. I don't think it's a TCPIP stack issue.

[cat5e]

I Guess is the word Virtual in my previous post that sticks out?

Quote from: How can I install the Microsoft Loopback adapter in Windows XP? (http://www.winnetmag.com/Article/ArticleID/37773/37773.html)

"The Loopback adapter is a useful tool for testing the configuration of network protocols such as TCP/IP on a local system when you don't have a network card. To install the Loopback adapter, perform the following steps".


saleen31 if this is the only adapter in your computer it means that either the computer do not an Actual Network Card, Or the Card is Broken, or Badly misconfigured.

:t