Also see Windows: Configuring the OS for Secondary VNICs. Remember that the first physical NIC is NIC 0, and the second is NIC 1. For bare metal instances, secondary VNICs are supported only on the second physical NIC. Windows: Both VM and bare metal instances (except for instances that use previous generation Standard1 and StandardB1 shapes).Also see Oracle Linux: Configuring the OS for Secondary VNICs. Linux: Both VM and bare metal instances.They're supported for these types of instances: Here are more details about secondary VNICs: However, all the VNICs must be in the same availability domain as the instance. Each secondary VNIC can be in a subnet in the same VCN as the primary VNIC, or in a different subnet that is either in the same VCN or a different one. You can add secondary VNICs to an instance after it's launched. For Windows instances, see Windows: Configuring the OS for Secondary VNICs. For Linux instances, see Oracle Linux: Configuring the OS for Secondary VNICs. You must also configure the OS so that the physical NIC has the secondary VNIC's IP configuration. If you add a secondary VNIC to an instance, you must specify which physical NIC the secondary VNIC should use. NIC 0 is automatically configured with the primary VNIC's IP configuration (the IP addresses, DNS hostname, and so on). On current generation Standard and DenseIO shapes, typically both NIC 0 and NIC 1 are active. If the network bandwidth is listed as "1 x Gbps," it means that only NIC 0 is active. If the network bandwidth is listed as "2 x Gbps," it means that both NIC 0 and NIC 1 are active, and each physical NIC has the indicated amount of bandwidth. You can determine which NICs are active for a shape by reviewing the network bandwidth specifications for bare metal shapes. Whether they're both active depends on the underlying hardware. The OS on a bare metal instance recognizes two physical network devices and configures them as two physical NICs, 0 and 1. This section is relevant to bare metal instances. A secondary VNIC can be removed orĭetached from an instance, but it is always immediately deleted and can't exist when Primary VNIC cannot be removed from the instance. That VNIC resides in the subnet you specify during launch. For more information, see IPv6 Addresses.Įach VNIC also has a friendly name you can assign, and an Oracle-assigned OCID (see Resource Identifiers).Įach instance has a primary VNIC that is automatically created and attachedĭuring launch. IPv6 addressing is supported for allĬommercial and government regions. NSGs have security rules that apply only to the VNICs in that NSG. Optional membership in one or more network security groups (NSGs) of your choice.A flag to enable or disable the source/destination check on the VNIC's network traffic (see Overview of VNICs and Physical NICs).A VLAN tag assigned by Oracle and available when attachment of the VNIC to the instance is complete (relevant only for bare metal instances).An optional hostname for DNS for each private IP address (see DNS in Your Virtual Cloud Network).An optional public IPv4 address for each private IP, chosen by Oracle but assigned by you at your discretion.Up to 31 optional secondary private IPv4 addresses from the same subnet the VNIC is in, chosen by either you or Oracle.One primary private IPv4 address from the subnet the VNIC is in, chosen by either you or Oracle.Each VNIC resides in a subnet in a VCN and includes these items: About VNICsĪ VNIC enables an instance to connect to a VCN and determines how the instance connects with endpoints inside and outside the VCN. Talk about VNICs and NICs, and how they're related. Virtual NICs (VNICs) associated with the physical NICs. Instance communicates using Networking service When you launch an instance on one of these servers, the The servers in Oracle Cloud Infrastructure data centers have physical
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