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When does AutoDiscovery discover layer 2 connectivity?

April 26, 2017autodiscovery connectivity discover

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When does AutoDiscovery discover layer 2 connectivity?

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Layer 2 connectivity is the port-to-port connections between two network devices. In some cases, multiple layer 2 connections exist between two devices. Layer 2 connectivity discovery does not include wide area network (WAN) or asynchronous transfer mode (ATM) connections. AutoDiscovery determines layer 2 connectivity by analyzing the cumulative data collected from all routers and switches on the network; this is the final step of the discovery process. It is a multi-pass process that combines data provided from a variety of both standard and vendor-specific SNMP MIBs. Unfortunately, AutoDiscovery is not always able to gather the information necessary to completely identify layer 2 connectivity because the process is highly dependent on the presence of accurate and complete vendor implementations of standard SNMP MIBs.