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Modifying the Express Path Configuration for Security Devices


Express path (formerly known as services offloading) is a mechanism for processing fast-path packets in the network processor instead of in the Services Processing Unit (SPU). Express path considerably reduces packet-processing latency by 500–600 percent.

You can use the Express Path section on the Modify Configuration page to view, create, edit, or delete Flexible PIC Concentrator (FPC) details on a device. You can toggle the status of one or more express paths. Express path is supported only on SRX5400, SRX5600, SRX5800, and rootLsys devices.

Note: Refer to the Junos OS documentation (available at for a particular release and device. There you can find detailed information on the configuration parameters for that device.

To modify the express path configuration:

  1. Select Devices > Security Devices.

    The Security Devices page appears.

  2. Select the devices whose configuration you want to modify. Click More or use the right-click menu and select Configuration > Modify Configuration.

    The Modify Configuration page appears.

  3. Click the ExpressPath link in the left-navigation menu.

    The Express Path section on the Modify Configuration page is displayed. The actions that you can perform in this page are provided in Table 112.

  4. After modifying the configuration, you can cancel, save, preview, or save the changes and deploy the configuration on the device. See Modifying the Configuration of Security Devices.

Table 112: Express Path Actions



Add FPC details

Click the + icon to add FPC details.

The Add FPC Details page appears. Complete the configuration according to the guidelines provided in Table 113 and click OK.

The FPC details are created and you are returned to the Express Path section on the Modify Configuration page.

Edit FPC details

Select an express path and click the pencil icon.

The Edit FPC Details page appears, showing the same fields that are presented when you create an express path. See Table 113 for a description of the fields. After you have modified the express path, click OK.

The changes are saved and you are returned to Express Path section on the Modify Configuration page.

Delete express path

Select one or more express paths and click the X icon to delete the routes.

The Warning page appears. Click Yes to confirm the deletion. The selected express paths are deleted.

Toggle the status of an express path

Select one or more express paths. Click More or use the right-click menu and select Toggle.

The activated express paths are deactivated and the deactivated express paths are activated.

Note: The Toggle option is enabled only when the selected express paths are a mix of activated and deactivated records.

Table 113: Fields on the Add FPC Details Page

FPC Slot Number

Enter a valid FPC slot number, which can be a value from 0 through 127.


Select this option to enable session cache on an I/O Card (IOC).

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