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The Rail Delivery Group's (RDG) customers were facing performance issues with the National Reservation System (NRS) due to latency caused by the legacy Multiprotocol Label Switching (MPLS) network.
The NRS performance issues risked impacting the customer experience and future ticket sales. To resolve these issues, Colibri implemented a modern, cloud-native networking solution that allows train operators with AWS infrastructure to move away from the outdated MPLS connection in favour of AWS-native connectivity.
"Colibri has proven to be a knowledgeable and dedicated supplier during the implementation of the AWS solution and Broker Migration for RARS. The ability to work collaboratively, as well as the support and flexibility shown throughout the process, have been critical in its success."
Each consumer now uses a dedicated AWS PrivateLink endpoint, accessed via a unique weighted Amazon Route 53 DNS record. This setup significantly reduces latency by routing traffic efficiently and securely. The legacy MPLS remains as a backup route for resilience.
Colibri deployed the solution using Infrastructure as Code (IaC) through AWS CloudFormation, replacing the older architecture with scalable, secure AWS services. To maintain visibility and support, VPC flow logs and Amazon CloudWatch Contributor Insights are used for monitoring, telemetry, and rapid diagnostics.
Cost optimisation is also an ongoing focus. Using AWS-native cost analysis tools, Colibri continuously reviews usage and makes recommendations to improve performance and reduce unnecessary spend.
RDG has seen clear improvements since implementing the new AWS-native solution, including:
Performance: Up to 70% faster response times for end users
Reliability: More consistent, dependable connectivity
Simplicity: Easier management of a once-complex architecture
Security: Private IP connectivity and AWS-native controls reduce exposure to cyber threats
Observability: Enhanced infrastructure visibility from end to end
By replacing the legacy MPLS system, Colibri has helped RDG eliminate long-standing connectivity issues. The result is a smoother, faster experience for passengers using RDG services, from purchasing train tickets to accessing critical travel information.
Reduced to within 6-second lead time
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