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Example: Configuring an Aggregate Interface (NSM Procedure)

 

An aggregate interface combines two or more physical interfaces, enabling each member to share equally the traffic load on the aggregate interface IP address. Use an aggregate interface to increase the amount of bandwidth available to a single IP address. You can also provide redundancy: If one member of an aggregate interface fails, the other members can continue processing traffic—although with less bandwidth than previously available.

The NetScreen-5000 line supports aggregate interfaces with Secure Port Modules (SPMs):

  • The 5000-8G SPM supports up to four aggregate interfaces.

  • The 5000-24FE SPM supports up to five aggregate interfaces.

You must assign one of the following names to the aggregate interface: aggregate1, aggregate2, aggregate3, aggregate4, or aggregate5.

In this example, you combine two Gigabit Ethernet mini-GBIC ports, each running at 1 Gbps, into an aggregate interface (aggregate1) running at 2Gbps. The aggregate interface combines Ethernet ports 1 and 2 on a NetScreen 5000-8G SPM (residing in Slot 2) and is bound to the Trust zone.

  1. Add a NetScreen-5200 device running ScreenOS 5.x, 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. For Card Type, select 5000-8G SPM.

    • Click OK to save the slot configuration.

  2. Configure the aggregate interface:

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

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

  3. Configure the following options:

    • For Zone, select Trust.

    • For IP address/netmask, enter 10.1.1.0/24.

    • For Interface Mode, ensure that the mode is set to NAT.

    • Click OK to save your changes.

  4. Add the ethernet 2/1 interface as a member of the aggregate1 interface.

    • In the device navigation tree, select Network > Interface. Double-click ethernet2/1. The General Properties screen appears.

    • Configure the Parent Aggregate Interface as aggregate1.

    • Click OK to save your changes.

  5. Add the ethernet 2/2 interface as a member of the aggregate1 interface.

    • In the device navigation tree, select Network > Interface. Double-click ethernet2/2. The General Properties screen appears.

  6. Configure the Parent Aggregate Interface as aggregate1.

  7. Click OK to save your changes.