Configure a physical interface

Configure physical interface settings including enable/disable state, speed, duplex, type, and auto-negotiation to ensure proper network connectivity.

You can physically enable and disable interfaces, as well as set the interface speed and duplex. To use an interface, it must be physically enabled in FXOS and logically enabled in the application.

Note

  • For QSFPH40G-CUxM, auto-negotiation is enabled by default and you cannot disable it.

  • If you replace an SFP on a port with a different SFP module, the speed, duplex, and auto-negotiation of the interface is not updated automatically. You must manually reconfigure the interface.

Before you begin

An interface that is already a member of an EtherChannel cannot be modified individually. Be sure to configure settings before you add it to the EtherChannel.

Procedure

Step 1

Choose Interfaces to open the Interfaces page.

The All Interfaces page shows a visual representation of the currently installed interfaces at the top of the page and provides a listing of the installed interfaces in the table below.

Step 2

Click Edit in the row for the interface you want to edit to open the Edit Interface dialog box.

Step 3

Configure the interface settings:

  1. To enable the interface, check the Enable check box. To disable the interface, uncheck the Enable check box.

  2. Choose the interface Type:

    See Interface types for details about interface type usage.

    • Data

    • Mgmt

    • Firepower-eventing—For Firewall Threat Defense only.

    • Cluster—Do not choose the Cluster type; by default, the cluster control link is automatically created on Port-channel 48.

  3. Choose the speed of the interface from the Speed drop-down list.

  4. If your interface supports Auto Negotiation, click the Yes or No radio button.

    If a peer switch connecting to the port over a 50G cable does not support auto-negotiation, ensure to disable auto-negotiation on the switch and the platform interface as well. For example, N9K-C93400LD-H1 does not support auto-negotiation on a 50G cable. Hence, for the port to be connected you must disable the default auto-negotiation on the platform and the switch.

  5. Choose the duplex of the interface from the Duplex drop-down list.

  6. Choose a previously-configured Network Control Policy. For more information on how to configure a Network Control Policy, see Configure a Network Control Policy.

  7. Explicitly configure Debounce Time (ms). Enter a value between 0-15000 milli-seconds.

    Note

    Configuring Debounce Time is not supported on 1G interfaces.

Step 4

Click OK.