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This document provides details about the Direct Connect architecture migration we will be executing in early 2023.

Rationale

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Scope

As of , 65 Cornell AWS accounts were configured to use Direct Connect. During this migration, all those AWS accounts will have their existing Direct Connect connectivity updated to use new pathways and AWS resources to connect the Cornell campus network to AWS. 

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draw.io source: direct-connect-migration-process.v2.drawio

PhaseStageTimeframeActivityImpact on Cornell AWS Account VPC Network
Preparation

Data CollectionNovember 2022
  • Gather information about Direct Connect resources and connected VPCs in Cornell AWS accounts
none
Resource TaggingDecember 2022
  • Add tags to existing resources in customer accounts to assist with targeting, identification, status, intended disposition
none
Resource Groups
  • Create Transit Gateway in CIT AWS account
  • Create Resource Groups for resources involved in the migration in customer accounts
none
Customer Input #1
  • Customer review and feedback
none
Migration

Transit Gateway AttachmentsJanuary 2023
  • Transit Gateway Attachments created in customer accounts
  • V2 Route Tables created in customer accounts
none
Customer Input #2
  • Cornell AWS account owner review and feedback
  • Route Table and/or TGW Attachments adjusted according to customer input
none
VPC Routing Updated
  • V2 Route Tables activated; V1 Route Tables deactivated
VPC-to-campus traffic will be routed through the v2 architecture
Campus Direct Connect Routes Updated
  • Campus-side routing updated to begin using the v2 architecture for campus-to-AWS traffic
campus-to-VPC traffic will be routed through the V2 architecture
CleanupCustomer Account CleanupJan/Feb 2023
  • VGWs and DC VIFs in customer accounts deleted
none
Campus Direct Connect Cleanup
  • Campus Direct Connect resources deleted or decommissioned
none

Timeline

  • We expect to complete all stages in the Preparation phase in December 2022.
  • We expect to complete all stages in the Migration phase in January 2023.
  • More specific dates for each stage are forthcoming.

FAQs

  • How do I tell if my AWS account will be affected by this change?
  • How will this change affect my AWS account costs?
  • Does this change affect VPC peering?
  • When, specifically, will this migration occur?
  • What if I use Terraform or a similar tool to manage the network resources in my AWS account?

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