To configure Google Cloud Platform (GCP) Interconnect and Oracle Cloud Infrastructure (OCI) FastConnect

 

 

To configure Google Cloud Platform (GCP) Interconnect and Oracle Cloud Infrastructure (OCI) FastConnect, you need to establish a reliable, high-bandwidth connection between GCP and OCI for private communication. This connection can be achieved via Partner Interconnect for GCP and FastConnect for OCI. Below is a detailed step-by-step guide to set up GCP Interconnect with OCI FastConnect:

1. Understanding the Terminology

a. Google Cloud Interconnect

  • Google Cloud Interconnect offers two types of connections:
    • Dedicated Interconnect: Physical connections between your on-premise infrastructure and GCP.
    • Partner Interconnect: A private connection provided by GCP’s network partners to connect your on-prem infrastructure or other clouds to GCP.

For GCP-to-OCI, Partner Interconnect is typically used since both clouds are involved.

b. OCI FastConnect

  • Oracle FastConnect provides a dedicated, private connection between OCI and your on-premise data center or other clouds (e.g., GCP, AWS). You can set up FastConnect either directly or through FastConnect Partner Networks.

2. Steps to Configure GCP Interconnect with OCI FastConnect

The process involves configuring both GCP and OCI to enable communication through their respective private connection services. You will typically need to engage with a network partner for the connection.

Step 1: Choose a Partner for Interconnect

  1. Select a Network Partner:
    • Both GCP Partner Interconnect and OCI FastConnect work with various network partners like Equinix, Megaport, and BT.
    • Select a partner that supports both GCP and OCI and provides connectivity in the regions where your workloads are hosted.

 

 

 

Step 2: Configure GCP Partner Interconnect

  1. Reserve VLAN Attachments:
    • Go to Google Cloud Console.
    • Navigate to Hybrid Connectivity → Partner Interconnect.
    • Click Create a Connection and select Partner Interconnect.
    • Enter the VLAN attachment settings, which will be used to connect to the partner. This includes the region, VLAN tag, and the bandwidth you want to allocate.
  2. Work with the Partner:
    • The network partner will provide you with connection details, such as LOA (Letter of Authorization) and Cross-Connect ID.
    • Share these details with your partner, and they will establish the physical link between GCP and their network.
  3. Configure the VPC on GCP:
    • You need to configure the Virtual Private Cloud (VPC) network and cloud router in GCP to manage routing over the Partner Interconnect.
    • Create a Cloud Router under the Networking tab and link it to the VLAN Attachment you reserved.
    • Advertise the necessary IP ranges to OCI using BGP (Border Gateway Protocol), which will enable IP routing between the two clouds.

Step 3: Configure OCI FastConnect

  1. Create a FastConnect Virtual Circuit:
    • In the Oracle Cloud Console, go to Networking → FastConnect → Create Virtual Circuit.
    • Choose FastConnect via Partner as the connection type, since you are using a partner for the interconnection with GCP.
    • Enter the Partner Details (e.g., Megaport or Equinix), and select the location and bandwidth that matches the details from GCP.
  2. Specify the BGP Information:
    • During the FastConnect setup, specify BGP ASN (Autonomous System Number), IP ranges, and BGP session details that match your GCP Interconnect configuration.
    • OCI will provide you with a BGP IP address to use on your GCP side.
  3. Confirm the FastConnect Virtual Circuit:
    • Once the network partner has provisioned the FastConnect, you can confirm the virtual circuit status in the OCI console. It should show as active.

Step 4: Establish BGP Peering

  1. Configure BGP on GCP Cloud Router:
    • On the GCP Cloud Router that you created earlier, configure the BGP peer for the connection to OCI.
    • Use the IP addresses and ASN information provided by OCI FastConnect.
    • Make sure the advertised routes from GCP can reach the necessary OCI networks.
  2. Configure BGP on OCI:
    • In OCI, configure the BGP peer for GCP in the FastConnect settings.
    • Advertise the necessary routes to GCP so that traffic can flow between the GCP VPC and the OCI VCN (Virtual Cloud Network).
  3. Test the BGP Connection:
    • Once the BGP sessions are established on both GCP and OCI, test the connection by pinging resources between the GCP VPC and OCI VCN.
    • Check the routing tables in both environments to confirm that the proper routes are learned.

 

 

 

 

Step 5: Verify and Monitor the Connection

  1. Check Network Performance:
    • Use network diagnostic tools to measure latency and throughput between GCP and OCI.
    • Ensure the desired bandwidth and latency are being met, and verify that the connection remains stable under load.
  2. Monitoring:
    • Use the monitoring tools available in both GCP and OCI to track the performance of the interconnect.
    • Set up alerts for any issues such as BGP flaps, high latency, or downtime.

3. Example Scenario

Let’s say you want to connect your GCP resources in us-central1 with your OCI resources in Phoenix (us-ashburn-1).

  • Partner Selection: Choose a partner like Megaport that has availability in both the GCP region (us-central1) and the OCI region (us-ashburn-1).
  • Provision VLAN on GCP: Create a VLAN attachment using Google Cloud Console and specify Megaport as the partner.
  • Provision Virtual Circuit on OCI: Create a FastConnect virtual circuit on OCI using Megaport as the provider. Specify the Phoenix region and ensure that the bandwidth matches the GCP Interconnect bandwidth.
  • BGP Configuration: Set up BGP peering between the GCP Cloud Router and OCI’s FastConnect, making sure that IP routes are properly advertised.

 

 

 

 

 

4. Best Practices

  1. Use Redundant Connections:
    • Ensure redundancy by setting up multiple Interconnects/FastConnect circuits in different availability zones or regions.
  2. Bandwidth Considerations:
    • Choose appropriate bandwidth for your workloads. If you're unsure, start with a lower bandwidth tier and monitor usage before scaling up.
  3. Test the Network Regularly:
    • Periodically test the connection to ensure performance and reliability, especially under high loads.
  4. Keep BGP Configurations Consistent:
    • Ensure that BGP configuration on both GCP and OCI matches to avoid routing issues.
  5. Engage with Network Partners:
    • Work closely with your partner (e.g., Megaport, Equinix) to ensure the setup is correct and troubleshoot any network issues.

5. Monitoring and Troubleshooting

Both GCP and OCI provide built-in tools for monitoring the health of the connection:

  • Google Cloud Monitoring: GCP’s Cloud Monitoring can monitor the health of the Interconnect connection, traffic, and latency.
  • OCI Monitoring: Use OCI’s Network Monitoring tools to track the FastConnect virtual circuit status, traffic levels, and BGP sessions.

If issues arise, you can:

  • Check BGP session status.
  • Validate that advertised routes are properly learned.
  • Use diagnostic tools like ping, traceroute, and OCI's FastConnect health check.

 

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