Discovering Layer 2 topology

The Layer 3 and Layer 2 topology are auto-built after the network discovery. You can also discover the Layer 2 topology independently.
Note: Only the administrators have the privileges to discover the Layer 2 topology by default. The discovery result will be saved in the Workspace Server.

1.Select either way to launch the Discover L2 Topology of LAN window.

Click L2 Topology > LAN Discover image_bimage158_zoom60 from the ribbon toolbar.

Right-click a Layer 3 Qmap and select Discover L2 Topology from the drop-down menu.

Right-click a LAN segment in the L2 Topology pane and select Discover L2 Topology in the drop-down menu. The IP address of this LAN segment is added into the Input field.

2.Enter the LAN segments you want to discover, separated by semicolons.

3.Click Options to configure the following properties on a pop-up dialog box.

Maximum number of CDP hops - the maximum CDP neighbor hops.

Minimum subnet mask - the minimum bit of subnet mask.

Add to One-IP-Table only if switch port or DNS name is available - this option is by default selected, if the discovered IP address does not have switch port or DNS information, then it will not be added into the One-IP table. See One-IP table for more details.

Via Live Network - select the access method to retrieve live data.

Via Cache Data in DataFolder - select the baseline data from previous benchmark baselines.

Don't change device setting - retain the original device settings (such as credentials, access mode and so on) and will not attempt to use others.

4.Click Start Discovery to discover the L2 topology. The log is loading and the discovery result will be uploaded to the Workspace Server. You can click Save to save the discovery result to your workspace.


See also:

Layer 2 Topology

Discovering network devices