Example: Configuring a Multilink Interface (NSM Procedure)

On available devices, you can configure and access multiple serial links called a bundle, through a virtual interface called a multilink interface. The multilink interface emulates a physical interface for the transport of frames.

In this example, you combine two WAN subinterfaces into an multilink interface. The name of the multilink interface must be mlid_num. For example, multilink interface names can be ml1, ml2, and so on.

1. Add an SSG520 device running ScreenOS 5.1, and then configure the network module:

   • Double-click the device icon to open the device configuration. In the device navigation tree, select Network > Slot.

   • Double-click slot 2 to display the slot configuration dialog box. Select a card type.

   • Click OK to save the slot configuration.

2. Configure the multilink interface:

   • In the device navigation tree, select Network > Interface.

   • Click the Add icon and select Multilink Interface. The General Properties screen appears.

3. Configure the following options:

   • For Name, accept the default.

   • For Zone, select Trust.

   • For Encapsulation Type, select mlfr-uni-nni.

4. Configure MLFR options:

   • For Name, accept the default.

   • For Zone, select Trust.

5. Click OK to save your changes.