NSX-T T1 Gateway: Does a T1 Without an SR Still Live on the Edge Cluster? 📅 Published by Farrukh Hanif 🏷 NSX-T | VMware | VCF | Networking If a T1 Gateway has no Services Router (SR), where does north-south traffic actually go? And does the T1 even touch the Edge cluster? This is one of those NSX-T concepts that catches people out — and understanding it is fundamental to designing efficient overlay networks. The Two Components of Every NSX-T Gateway Every Tier-0 and Tier-1 Gateway in NSX-T is logically made up of two distinct functional components: Distributed Router (DR) — runs on every transport node (hypervisor) that hosts a connected workload segment. It handles east-west routing entirely in the data plane of the host, with no hairpinning through a centralised appliance. Services Router (SR) — a centralised component instantiated on the Edge cluster. It handles stateful ser...