Dell Networking OS10: Interface Trunk Mode Configuration

Summary: How to configure OS10 Trunk Mode on an Interface.

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Instructions

Prerequisites:

Switch has a factory-default configuration with VLANs 10 and 11 configured.

Instructions

Instructions for setting up the management interface network connection:

  1. Open the CLI using the console or management IP for your S-series switch.

  2. Log in to the privileged exec mode as default admin credentials. (OS10: user=admin, password=admin).

  3. Show the status of the interfaces, noting the A for "access" mode:

    OS10# show interface status

    Observe the Eth 1/1/14 interface, highlighted below. It is in mode A for access.
    show interface status command output

  4. To modify the switch configuration, run the following command then press Enter.

    OS10# configure terminal
OS10(config)#

  5. To configure the Ethernet 1/1/14 interface, enter the following command:

    OS10(config)# interface ethernet 1/1/14
OS10(conf-if-eth1/1/14)#

  6. To change the interface mode to trunk with the following command:

    OS10(conf-if-eth1/1/14)# switchport mode trunk
OS10(conf-if-eth1/1/14)#

  7. Configure which trunk vlans will be assigned to the interface with the following.

    OS10(conf-if-eth1/1/14)# switchport trunk allowed vlan 10,11
OS10(conf-if-eth1/1/14)#

  8. Configure which access vlan will be assigned to the port with the following command

    OS10(conf-if-eth1/1/14)# switchport access vlan 1
OS10(conf-if-eth1/1/14)#

  9. Exit the interface and configuration back to exec mode with the following command

    OS10(conf-if-eth1/1/14)# end
OS10#

  10. Verify the configuration changes made on the interface with the command: show running-configuration interface ethernet 1/1/14
    show running-configuration command output

  11. To verify the changes to the interface with the command: show interface status. Verify that the Mode is now T for trunk. Access VLAN 1 is applied and tagged VLANS 10 and 11 are also assigned.
    show interface status command output

  12. To save the configuration changes, use the following command.

    OS10# write memory
OS10#

    For further assistance, see the Dell EMC SmartFabric OS10 User Guide Release Documentation or reach out to Dell Technical Support.

     

    Additional Information

    Refer to this video:

     

    Affected Products

    Enterprise SONiC Distribution
    Article Properties
    Article Number: 000201923
    Article Type: How To
    Last Modified: 03 Jun 2026
    Version:  3
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