BGP route policies: Top 3 use ... Note

BGP route policies: Top 3 use cases by customer demand

Google Cloud's BGP route policies for Cloud Router empower network administrators with programmable control over network path evaluation and propagation. Policy named sets have been introduced to manage growing complexity by grouping prefixes or BGP communities into reusable entities, simplifying configurations. These policies, powered by CEL, allow fine-grained filtering and attribute modification for BGP routes within Cloud Router. Customers have leveraged these policies for route filtering and network protection, implementing "fail closed" models for enhanced security. They also use them to influence traffic paths for active/standby architectures by modifying MED attributes or AS-PATH prepending. A significant use case involves solving asymmetric routing for stateful firewalls by matching BGP communities. This allows Cloud Router to tag routes, adjusting MED for symmetrical return traffic. Customers are encouraged to test policies in staging environments before production deployment. Resources are available for implementing route filtering, influencing traffic paths, and creating traffic symmetry. Overall, BGP route policies offer a more robust and easier way to control dynamic routing for hybrid cloud connectivity.