Request times out when pinging 127.0.0.1

[nepenthe42]

This has probably already been answered here somewhere, but I can't find the correct thread in any of my searches.

Here's my setup:

Toshiba cable modem (PCX2000)
Netgear wireless router (MR814)
Connected to two machines
The first computer, running Windows XP Pro, is connected to the router by a cable going into a USB/Network adapter (Linksys USB200M).
The second computer, running Windows XP Home, is connected to the router by a Netgear Wireless USB adapter (MA101).

Pinging 127.0.0.1 on the second computer returns four replies. On the first computer, all four requests time out.

The second computer can also successfully ping its IP Address and Gateway/DHCP Server. The first computer can successfully ping the Gateway/DHCP Server, but not its IP address.

The only difference I can see in the ipconfig /all is that the second computer's Node Type is Hybrid, while the first's is Unknown. I don't know how to change this.

The network properties on both computers are the same: Client for Microsoft Networks, File and Printer Sharing, QoS Packet Scheduler, and Internet Protocol (TCP/IP).

The internet connection through the router is working fine on both computers. My connection speeds are between 700 and 900 kbps.

If this has already been answered on this site, I apologize for repeating the question and ask for a link in the right direction.

Thanks a lot.

Dan

 

[tcambridge]

Dan,

If you can't ping your loopback (127.0.0.1), that means you have a problem with your protocol stack (TCP/IP). Uninstall it, reboot, and reinstall it and give it another try.

Tim Cambridge
A+, CCNA, MCSA, MCSE (W2K)

 

[bcastner]

As both computers can see each other and access the internet, it seems the only concern is that you cannot ping the loopback address.

If I had to guess it is due to your USB adapter. I am not a big fan of these devices I must admit upfront.

You might try going to Add/Remove programs in Control Panel, Windows Components, Networking, and check to install the Microsoft Loopback adapter.

Or, you just might leave everything alone!