Configuring a default route on an Isolated T1 with multiple segments in NSX-T (VMC)

Products

• VMware NSX Networking
• VMware Cloud on AWS

Issue/Introduction

Symptoms:

• You are running VMC (VMware cloud on AWS) versions 1.18, 1.19 or 1.20.
• You have configured multiple NSX segments to connect to a isolated T1 gateway.
• Configuring a static default route (0.0.0.0/0) on the connected T1 gateway will fail with the below error.

Environment

VMware NSX-T Data Center

Cause

The issue occurs due to a validation issue.

Resolution

This is a known issue impacting NSX-T Data Center on VMC.

Workaround:
Configure the static default route on the T1 gateway when it has only a single segment attached to it or none attached to it.
Once the static default route is added, additional segments can be attached to the T1 gateway.