This image shows a cloud topology deployed in an Oracle Cloud Infrastructure region with a single availability domain. The resources are distributed across two fault domains.

The topology has a single VCN, with the following subnets:

• A public subnet for the bastion host.
• A public subnet for the load balancer.
• A private subnet for the following Oracle WebLogic servers, one in each fault domain:
  • Oracle FLEXCUBE Universal Banking System integration with Enterprise Limits and Collateral Management (UBS-ELCM-OB)
  • Oracle Banking Digital Experience (OBDX)
  • Oracle FLEXCUBE Integration Gateway

  This subnet also contains block volumes for the WebLogic servers.

• A private subnet for the app tier, which includes the following components:
  • Web tier OBDX
  • Oracle Business Intelligence Publisher
  • ATM Switch Gateway

  This subnet also contains block volumes for the components in the app tier.

• A private subnet for the data tier, which consists of a 2-node RAC DB system.

Every subnet has a route table and a security list to regulate network traffic.

The VCN has the following gateways:

• An internet gateway for connectivity between the public internet and the bastion host (SSH/22) and the LB nodes (HPPTS/43).
• A NAT gateway for one-way access from the resources in the private subnets to the public internet.
• A service gateway for connectivity between the private subnets and resources in the Oracle services network: that is, the Object Storage service and the regional Yum repository.