Amazon CloudWatch Network Monitoring initially provided network health indicators (NHI) only for paths connected through AWS Direct Connect. AWS later expanded this functionality to support paths traversing Transit Gateway (TGW) inter-Region peering connections. This enhancement allows operators and developers to determine if performance degradations arise within the AWS network portion up to the TGW peering, facilitating quicker isolation of issues on inter-Region links.
The updated NHI data is published within CloudWatch accounts, enabling users to craft customized dashboards and alarms to monitor AWS network health across supported Regions. This development supports operational efficiency by removing ambiguity around AWS network involvement in cross-Region traffic paths, according to AWS documentation.
Source & further reading
Amazon CloudWatch now supports network health indicator for TGW inter-Region peering using synthetic monitors ↗Source published 2026-09-10. This report was prepared with AI assistance from the linked primary-source material. Claims and limitations should be checked against the original announcement or research.