Layer 2 Mapping


OpManager renders the logical network topology diagram once  you discover the networks and network devices. For a better visualization of the physical network connectivity in real networks and the consequences of a failure of a device, network topology map comes handy. To enable automatic layer 2 mapping, post discovery, you will need to specify the seed file so that layer 2 mapping is automatically done. OpManager purely relies on SNMP to represent the connectivity of nodes and links in the network.


This document explains the following:


What is a seed device?


A seed device is the core switch in your network. The switch must have SNMP-enabled so that OpManager is able to query the device and draw the links automatically, showing the connectivity of all the devices on your network. As changes happen to the networks frequently, OpManager allows you to configure an interval (in days) to re-draw the map. For instance, if a change happens once in a week, you can configure OpManager to re-draw the map every seven days.

Configuring the seed device

  1. From the OpManager dashboard, select Maps --> Network Maps link (mouse-over the Maps tab to see the links to all the maps).
  2. In the Networks Map, select Actions --> Settings menu to your right.
  3. You will find a combo-box to select the seed device. Select the core switch from the list.
  4. Select the topology layout from the layout combo-box.
  5. Specify the interval (in days) at which the map must be re-drawn in the Sampling Interval field and click Submit.

The map is generated. You can change the layout by selecting the type as Radial Tree, Balloon Tree, Node Link or Custom option for the Layout combo-box on top of the network map. You can also export the map to Visio, or even save it as a business view in OpManager.

Saving the Layer 2 Map as a Business View

  1. In the Networks Map, select the menu Actions --> Save As.
  2. Configure a name for the view in the dialog that pops up.

It is saved as a business view which you can assign to a user based on his role. You can access this business view from the Maps tab.


Exporting to Visio




Make sure you have Microsoft Visio 2007. Visio can be installed on any of your Windows devices and it need not be on the same server as OpManager. Ensure that you are able to access OpManager Weblcient from the machine where Visio is installed.



  1. Download OpManager Add-in for Microsoft Visio from here.
  2. Unzip the add-in download and extract the file ManageEngineOpManagerMicrosoftVisioAddin.msi.
  3. Double-click the msi file to install the Add-in.
  4. After successful installation, launch Visio and look for OpManager menu in the menubar. The add-in has installed properly if you find the menu!

Exporting Views from OpManager

  1. Access OpManager webclient from the machine where MS Visio 2007 is installed.
  2. You can export the map to Visio from the Network Maps link using Actions --> Export to Visio menu.
  3. You can also export it from the business views using the Export to Visio button on top of the corresponding business view.
  4. On exporting, you will be prompted to save the corresponding XML file with the name TopoMap.xml. Save the map in the desired location on that machine.

Loading the exported maps in Visio

  1. From the Visio GUI, access OpManager --> Load Map menu from the menubar.
  2. Browse and select the TopoMap.xml (you can rename the xml after you save it on the machine). The exported map will be loaded in Visio.
  3. Make the desired changes and save. You can save the diagram as a vsd file or in standard Visio formats.


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