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To add an additional network interface to an instance or to remove an interface from your instance perform the steps described below.
The steps below only provide a basic overview. The exact tasks required will vary depending on your network design. Please refer to the Oracle cloud documentation for details. In particular, adding additional VNICs to a Linux system running on a baremetal OCI instance requires additional steps to enable the operating system to recognize the additional interface. See https://docs.cloud.oracle.com/iaas/Content/Network/Tasks/managingVNICs.htm for details.
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When an instance is created, a default Ethernet interface is attached to the system. This is the primary network interface You can create additional network interfaces and attach them to an instance.
Adding a New Network Interface to an Instance
The following steps are required to create a new network interface and to add it to an instance:
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The screen shows the already attached VNICs.
Click on Create VNIC to continue. This will open the VNIC creation window.
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In this window, add for example
- the name of the VNIC,
- the virtual cloud network and the subnet to which the VNIC is connected (can be created via Compute > Networking > Virtual Cloud Networks),
- the private IP address of the VNIC (within the CIDR block of the virtual cloud network),
- whether a public IP address should be assigned to the VNIC.
Once you added all the desired information, click on Create VNIC.
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The instance details section should now show the newly attached VNIC. Example:
Removing a VNIC from an Instance
To remove a VNIC from an instance, select the instance in the instance list and display the Attached VNICs in the Resources section.
Then click on the three dots next to the VNIC and select Delete.
The primary VNIC cannot be deleted.
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