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Viewing the VLAN Overlay Details
To view the VLAN Virtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN. information, perform the following steps:
- Select the VLANs option under Overlays.
The VLANs pane is displayed and the network elements in the topology map, such as device icons and edge links, are grayed out. The pane displays the first 50 VLANs (unique VLAN ID and name pairs) in the ascending order of VLAN IDs. To search for other VLANs, click the search icon.
- Select a VLAN from the VLANs pane.
You can also enter a VLAN name or ID in the search box.
- The topology map displays the following information:
- The switches that have the selected VLANs configured are highlighted in a color depending on the status of the switch - green for online and red for offline.
- The edge links connecting two switches are highlighted in blue, if the following conditions are met:
- The VLAN IDs are present in both the switches and in the ports associated with the edge link between the switches.
- The VLAN type (tagged or untagged) configured is the same in both the switches.
- Hover over the switch to view the list of all VLANs (comma separated) configured on the switch.
The VLAN IDs are also listed as a range when consecutive VLAN IDs are configured. For example, 100–178, 190, 210.
- Hover over the edge link connecting the two switches. The pop-up displays the following information:
- Host name of the switch
- Serial number of the switch
- VLAN ID
- Type of VLAN - tagged, untagged, or missing
