Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: A unique observation with Link Layer mapping.

16 Jun 2016   #1
slipkid

Win 7 SP1 Professional 64 bit
 
 
A unique observation with Link Layer mapping.

The conditions:
(2) Lenovo L512 computers with identical hardware running Win 7 Pro. Both are connected to the modem using CAT 5 cables.

Centurylink modem setup for IPv6.

All necessary Win 7 Services for computer discovery and for the mapping function selected and started.

What I have discovered.

In the case of my home network, if I have the Link Layer Topology Discovery Responder ("LLTDR") checked "yes" on both machines Realtek PCIe GBE Family Controller (ethernet adapter) I get NO map of my network. Instead, I get the message, "An error happened during the mapping process" on both machines.

If, I uncheck the LLTDR box on one machine, I get a map on both machines. The maps are different, and display as follows.

On the computer where I have checked the LLTDR box, I get a map that shows the proper connection of this machine to the hub and then to the router. There is NO "discovered" picture of the other computer, either in the top section or in the section at the bottom ("discovered devices that can not be placed in the map.")

On the computer with the LLTDR box unchecked, I get a map that shows the proper connection for the other computer to the hub and then to the router. As for this computer, the map shows the machine connected to the hub with an intermediate ? for this connection.

I have researched the problems others have had in getting the mapping function to work correctly, and I have found nothing that gives me an understanding of why unchecking one computer's LLTDR program allows for maps to be displayed on BOTH machines, albeit incomplete on the "unchecked" LLTDR machine.

It seems I am quite close to getting the mapping function to work correctly on both machines. Perhaps there is some sort of collision problem taking place. I would appreciate any insights into my situation.


My System SpecsSystem Spec
.
Reply

 A unique observation with Link Layer mapping.




Thread Tools Search this Thread
Search this Thread:

Advanced Search




Similar help and support threads
Thread Forum
D-Link DNS-320 Mapping Issue
I followed the cd setup .. as it is.. now everythings completed. No I'm not new at networking . I know some stuff so after I went and changed a few things .. some of which should be done 1) went to d-link website (the server config page) .. set a static IP for the server.. 2) went to my...
Network & Sharing
Link Layer Topology Discovery (LLTD) Discovery/Responder
http://i53.tinypic.com/eak41z.jpg are these needed to have internet i dont want to uninstall if internet will not work.
Network & Sharing
IE 9 observation
When i switch between open tabs (with pages loaded), "Your most popular sites" flashes briefly before rendering the actually site loaded. Anyone else noticed this?
Browsers & Mail
Link Layer Topology Discovery
Browsing the internet I found that Windows has or had a Link Layer Topology Discovery view/function(?). Does this still exist? I am not able to create a similar view. Mine is as per first image. Second image shows LLTD view. As usual I have to ask, what am I missing? Thanks and...
Network & Sharing


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 13:34.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App