Switching > L2 Discovery

The SonicOS appliance uses IEEE 802.1AB (LLDP)/Microsoft LLTD protocols and a switch-forwarding table to discover nodes visible from a port. These are Layer 2 protocols and do not cross a broadcast domain. More information is available at the following links:

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https://en.wikipedia.org/wiki/Link_Layer_Topology_Discovery, Link Layer Topology Discovery
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https://en.wikipedia.org/wiki/Link_Layer_Discovery_Protocol, Link Layer Discovery Protocol

An ARP table is used to connect MAC addresses to IP addresses.

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NOTE: Windows XP users need to download, install, and enable the LLTD responder driver from Microsoft.