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[EOL/EOE] [ScreenOS] How to create a subinterface



Article ID: KB4480 KB Last Updated: 07 Sep 2021Version: 10.0

This article provides information on how to create a subinterface.

Note: A product listed in this article has either reached hardware End of Life (EOL) OR software End of Engineering (EOE).   Refer to End of Life Products & Milestones for the EOL, EOE, and End of Support (EOS) dates.


Note: This article is applicable to ScreenOS 4.0 or later.


To create a subinterface, perform the following procedure:

  1. Open the WebUI. For more information on accessing the WebUI, refer to KB4317 - [ScreenOS] Accessing your Juniper firewall device using the WebUI.

  2. From the NetScreen options menu, select Network, and then Interfaces:

Image of step two

  1. From the List Interfaces drop-down menu, select Sub-IF:

Image of step three and four

  1. From the Interface drop-down menu, select Sub-IF.

  2. Click New:

Image of step five

  1. From the Zone Name drop-down menu, select a zone to bind to. In the VLAN Tag text box, type a VLAN Tag number.

Note: Do not use a VLAN Tag of 1, as this can cause some conflicts with Cisco switches.

Image of step six and seven

  1. Click OK.


To configure a subinterface, use the following commands via the CLI:

>set interface ethernet1/1.1 tag 5 zone "Trust"
>set interface ethernet1/1.1ip
>set interface ethernet1/1.1 ip manageable
>set int eth0/1.1 manage-ip
Modification History:

2021-09-07: restored availability of the article.
2020-12-12: Removed the attached CASE-ID and Minor non-technical changes were made.

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