[VMC] Incorrect external TGW routes showing in SDDC group routing table

Products

• VMware Cloud on AWS

Issue/Introduction

• Routes were added or removed from an External Transit Gateway (TGW). 
• These updates are not showing in the SDDC Group Routing Table. 
• Stale routes may also be seen from before the updates. 
• Correct information is being seen in the AWS Console for the TGW. 

Environment

VMware Cloud on AWS

Cause

• The External TGW was in a Connecting/Pending state when the routing changes were made. 

Resolution

• Ensure the External TGW is showing as Connected and not a Connected/Pending state when changes are made. 
• Verify the correct static routes are showing in the SDDC Group TGW section. 
• If the routes in the External TGW are correct and the SDDC Group Routing Table does not match, open a ticket with the VMC on AWS Global Support team. 
• Include the following information in the ticket:
  • Organization ID
  • SDDC ID
  • SDDC Group Name
  • Screenshot of the External TGW Routes from the AWS Console
  • Routes that do not match between the External TGW and SDDC Group Routes

Additional Information

• Creating and Managing SDDC Deployment Groups with VMware Transit Connect
• What is AWS Transit Gateway for Amazon VPC?