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- Aggregate: Shows L2 network devices and their respective connections, in aggregate or a choice from several individual layer 2 link types. The Aggregate view is the default. It is loaded first when you open the Topology Viewer. You can change which view to load first in the Topology Viewer settings. For more information, see Other Properties.
- Link Discovery Protocols: Shows L2 devices using Link Layer Discovery Protocol (LLDP) or Cisco Discovery Protocol (CDP), and their interconnections.
- Serial Links: Shows L2 devices connected by serial links.
- Switch Forwarding: Shows L2 devices using switch forwarding.
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