[VMC] Missing Learned Routes under Transit Connect

Products

• VMware Cloud on AWS

Issue/Introduction

• Traceroutes will show packets being dropped at the Direct Connect IP. 
• Within the SDDC Group, routes are being learned from both respective SDDCs, however one of the SDDC may not show the route from the other, resulting in the network disruption between the SDDCs in the SDDC group.

Environment

VMware Cloud on AWS

Cause

• This was a result of missing PL (Prefix Lists) within one SDDC. 
• This was caused due to an issue with the Corfu service not writing properly to the PL table.

Resolution

• This issue was resolved in VMware Cloud on AWS SDDC of version 1.20v8 and above.
• Workaround: Raise a Wolken ticket with VMware Cloud on AWS team to fix the issue at the backend (Get Support).