When LLTD is invoked, it provides metadata about the device that contains static or state information, such as the MAC address, IPv4/IPv6 address, signal strength, and so on, as well as a scaleable icon that represents the industrial design or form factor of the device.
#Windows network topology mapper windows#
Devices can also implement LLTD-and those that do so can report rich configuration information about themselves that appears in the various network map views available in Windows Vista, regardless of any IP configuration issues on the network. In every version of Windows Vista, LLTD is on and enabled by default.
Exploring the Network: Link Layer Topology Discovery
Applications can dynamically adapt to changing network characteristics if devices support LLTD QoS Extensions. In addition, LLTD provides QoS Extensions that enable stream prioritization and quality media streaming experiences even on networks with limited and changing bandwidth. As the protocol name suggests, LLTD enables device discovery via the data-link layer (Layer 2) and determines the topology of a network. The specification for Link Layer Topology Discovery describes how the LLTD protocol operates over wired (802.3 Ethernet) and wireless (802.11) media. Specification link: Link Layer Topology Discovery Protocol Specification Network Topology and QoS Extensions: LLTD Implement LLTD with a custom icon to ensure that your product’s industrial design or form factor is graphically depicted. Devices that provide audio or video playback or that are bandwidth sensitive can implement the QoS Extension portions of the protocol to ensure that they receive prioritized streams and that changes in available bandwidth have little or no impact on the user experience. LLTD provides the added benefit of enabling quality media streaming experiences, even on networks with limited bandwidth. Any device that implements LLTD appears on the Network Map with a rich icon that represents the device, allowing users one-click access to the device’s Web user interface (UI). The LLTD protocol enables applications to quickly discover devices at the data-link layer, and it enables a central, graphical view of everything that is connected to the network.
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