Configure a Layer 2 Interface

1. Log in to Strata Cloud Manager.
2. Select ManageConfigurationNGFW and Prisma AccessDevice SettingsInterfacesEthernet and select the Configuration Scope where you want to create the Layer 2 interface.

   Select a firewall from your Folders or select Snippets to configure the Layer 2 interface in a snippet.

   If you select a folder or select a snippet, you create a Layer 2 interface variable that must be assigned at the device level.
3. Add the interface.

   If you’re configuring a Layer 2 interface for a specific firewall, select the interface you want to configure instead.

   • Folders and Snippets—Add Interface and select Interface.
   • Firewalls—Add and Add Interface.
4. Configure the interface.

   If you’re configuring an interface in the folder or snippet scope, the interface configuration is pushed only to firewalls that have the corresponding interface slot available. For example, if you configure Ethernet 1/5 in the folder scope and the firewall associated with the folder has only four interface slots, then the configuration isn’t pushed to the firewall.

   1. Select the interface Slot.
   2. Select the Interface Name.

      When you configure an interface for a specific firewall, the Interface Name is fixed, such as ethernet1/1 if you select Slot 1. The fixed interface names are dependent on the slot that you selected in the previous step.
   3. (Folders and Snippets only) Select the Default Interface Assignment.
   4. (Optional) Enter a Description.
   5. For Interface Type, select Layer2.
   6. (Folders and Snippets only, Optional) Assign Interface to VLAN Tag to add the interface to a VLAN.
   7. (Folders and Snippets only; Recommended) Assign the interface to a Zone.

      Create New to create a new zone. See Zone Protection and DoS Protection for more information.

      Selecting an inherited zone overrides the previous settings and removes any inherited objects. Any changes made to the global folder are no longer inherited in a top-down manner. A message appears, indicating that the interface settings will be overridden and the inherited objects from the parent folder will be removed on all firewalls. When you save your changes, a confirmation message appears. If you confirm, the zone is overridden.
5. (Optional) Configure the interface link settings.

   1. Select the interface Link Speed.

      Auto is selected by default and allows the firewall to determine the speed.
   2. Select the interface Link Duplex transmission mode.

      Auto is selected by default to allow the firewall to negotiate the transmission mode automatically.
   3. Select the interface Link State.

      Auto detect is selected by default to allow the firewall to determine the link state.
6. Save.
7. Create a Security policy rule to allow the traffic through the tap interface.

   When creating a Security policy rule for a tap interface, both the source zone and destination zone must be the same.

   1. Select ManageConfigurationSecurity ServicesSecurity Policy and Add Rule.
   2. For the Source, Add Zones and select the zone you created in the previous step.
   3. For the Destination, Add Zones and select the zone you created in the previous step.
   4. Set all of the Security policy rule match criteria (Applications, User, Service, Address) to any.
   5. For the Action and Advanced Inspection, set the Action to Allow.
   6. Expand the Advanced Settings and for the Log Settings, set Log at Session End.
   7. Save.
8. Push Config to push your configuration changes.