Remote peering in Oracle Cloud Infrastructure allows two VCNs in different regions to communicate securely. To establish remote peering, the following components are required:
* Two VCNs with Nonoverlapping CIDRs:
* The CIDR blocks of the two VCNs must not overlap. This is crucial to avoid routing conflicts and ensure that traffic is correctly routed between the VCNs.
* Dynamic Routing Gateway (DRG) Attached to Each VCN:
* A DRG is a virtual router that provides a path for traffic between the VCN and networks outside the VCN, such as other VCNs via remote peering, on-premises networks, or other cloud services.
Each VCN needs its own DRG.
* Remote Peering Connection (RPC):
* An RPC is a specialized connection on the DRG used specifically for remote peering. You need to create an RPC on each DRG associated with the VCNs you wish to peer.
* Connection Between RPCs:
* Finally, a connection must be established between the RPCs of the two DRGs. This connection facilitates the secure and private exchange of traffic between the VCNs over Oracle's backbone network.
* Incorrect Options:
* Option Ainvolves a single VCN, which does not fulfill the requirement of remote peering between two VCNs.
* Option Binvolves overlapping CIDRs and VPN gateways, which are incorrect for remote peering.
* Option Csuggests peering within the same region, which would be considered local peering rather than remote peering.
* Relevant OCI Documentation:
* OCI Remote VCN Peering
* Dynamic Routing Gateway (DRG) Overview
These resources provide a detailed guide on configuring remote peering in OCI, ensuring secure and effective communication between VCNs across regions.