Link Layer Topology Discovery - Wikipedia, the free encyclopedia. Link Layer Topology Discovery (LLTD) is a proprietary Link Layer protocol for network topology discovery and quality of service diagnostics. Microsoft developed it as part of the Windows Rally set of technologies. The LLTD protocol operates over both wired (such as Ethernet (IEEE 8. IEEE 8. 02. 1. 1).
LLTD is included in Windows Vista and Windows 7. It is used by their Network Map feature to display a graphical representation of the local area network (LAN) or wireless LAN (WLAN), to which the computer is connected. Windows XP does not contain the LLTD protocol as a standard component and as a result, Windows XP computers do not appear on the Network Map unless the LLTD responder is installed on Windows XP computers. LLTD is available for download for 3. Windows XP with Service Pack 2 (as a publicly released update) and for Windows XP with Service Pack 3 (as a hotfix by request). LLTD Responder is not released for Windows XP Professional x.
Edition. A 2. 00. Xbox 3. 60 enabled support for the LLTD protocol.Being a Link Layer (or OSI Layer 2) implementation, LLTD operates strictly on a given local network segment. It cannot discover devices across routers, an operation which would require Internet Protocol level routing.
Link Layer Topology Discovery in Windows Vista consists of two components. The LLTD Mapper I/O component is the master module which controls the discovery process and generates the Network Map. Appropriate permissions for this may be configured with Group Policy settings. It can be allowed or disallowed for domains, and private and public networks.
The Mapper sends discovery command packets onto the local network segment via a raw network interface socket. The second component of LLTD are the LLTD Responders which answer Mapper requests about their host and possibly other discovered network information. In addition to illustrating the layout of a network with representative icons for the hosts and interconnecting lines, each device icon may be explored to produce a popup information box summarizing important network and host parameters, such as MAC address and IP address (both IPv.
IPv. 6). Icons are labeled with the hostnames (or first component of their fully qualified domain names), or a representative name of the function of the device, e. If the device has reported the presence of a management Web interface, clicking on the icon will open a HTTP session to the host. The LLTD responder for Windows XP only supports reporting of IPv. IPv. 6. A royalty free.
Latest Link layer topology files. the link layer topology discovery files at least. are running Windows XP. Note: Install the hotfix only. Link Layer Topology Discovery (LLTD). The LLTD responder for Windows XP only supports reporting of IPv4 addresses, but not IPv6.
Linux sample implementation of the LLTD responder is available from Microsoft as part of the Windows Rally Development Kit. Using LLTD specifications requires signing a Microsoft Windows Rally license agreement.There also exists a Perl implementation, using Net: :Frame, available via CPANSee alsoReferencesExternal links.
Installing Link Layer Topology Discovery. from the following link: Link Layer Topology Discovery. list select Windows XP. Click Ok. You can now install the. Enable or disable the LLTD Mapper I/O with. to enable or disable the Link Layer Topology Discovery. on a computer running Windows XP. After the installation you will see your Windows XP computers appear in the Vista network map. Note: You might be able to have your Windows Server 2003 servers. A full network requires that Link-Layer Topology Discovery. There is a hotfix to enable the feature in Windows XP. Several reported Link-Layer Topology.
Enable or disable the LLTD Responder with Group Policy. procedure to enable or disable the Link Layer Topology Discovery. For Windows XP with. Network Map in Windows Vista does not display computers that are running Windows XP.