Configuring Duplicate Address Detection on iNodes and Clusters

Duplicate Address Detection (DAD) monitors the IP addresses used by the Edge iNode network interface(s) and any services running on the Edge iNode network. DAD enables detection and notification of duplicate IP addresses between the iNode TAN interface, TAN Services' IP addresses, and IP addresses for entities and devices that are south of the iNode. You can configure DAD on Edge iNodes and Clusters.

Prerequisites

The following settings are required before enabling DAD services:

1. On the Add/Edit Network screen, verify that the Service Addressing mode is set to Dynamic. This mode is selected by default when you create a new network.
2. Reserve one additional IP address for each network on the Edge iNode. This additional IP address will be used by the DAD service.

Enabling Duplicate Address Detection

1. To enable DAD, on the left menu select the All iNodes or Clusters option, respectively, and select the iNode or Cluster for which to enable the DAD service.
2. On the Manage iNode or Manage Cluster dropdown menu (top-right), select Edit → Advanced Settings.
3. Set the Duplicate Address Detection toggle switch to Active. The scan interval specifies the scan frequency of the service. The default is 5 minutes.

Viewing Duplicate Address Detection Status

After the DAD service is enabled, you can view its status.

1. On the Manage iNode or Manage Cluster drop-down menu (top-right), select View Duplicate Address.
   For an iNode, if any duplicate IP addresses are found, a warning message appears at the top of the iNode details page. For example:
2. Click the View Details link to display the scan results and details of the duplicates found.

For a cluster, you can select a node name from the drop-down list to display the Edge Node’s detected duplicate addresses.

From the View Duplicate Address screen, you can also manually force the DAD service to run by clicking the Scan Duplicate Address button.

Managing Duplicate Address Detection Services

You can change the DAD Scan Interval and also disable DAD services using the Manage iNode or Manage Cluster drop-down menu, respectively, and selecting Edit → Advanced Settings.

Set the Duplicate Address Detection toggle switch to Not Active, and click the Update button on the Edit iNode/Edit Cluster page, respectively.