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GCP Cloud Router BGP route policies: Top 3 customer use cases

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Google Cloud has highlighted three key customer use cases for its Cloud Router BGP route policies, emphasizing enhanced network control and simplified configurations. The introduction of policy named sets allows for grouping prefixes and communities, simplifying management of complex routing rules. These features are now generally available and recommended for optimizing hybrid cloud connectivity, with a suggestion to test in staging environments first.

  • →Introduce policy named sets for Cloud Router
  • →Use case 1: Route filtering and network protection
  • →Use case 2: Influencing traffic paths for active/standby architectures
  • →Use case 3: Solving asymmetric routing with BGP communities
Features (1) ›
  • Introduce policy named sets for Cloud Router

    Policy named sets have been launched for Cloud Router, enabling users to group lists of IPv4/IPv6 prefixes or BGP communities into a single, reusable entity. This feature simplifies configuration management and scalability of routing rules across multiple Cloud Routers.

Notes (3) ›
  • Use case 1: Route filtering and network protection

    Customers use BGP route policies to filter unwanted learned routes from peers or prevent specific subnet prefixes from being advertised. This enables a 'fail closed' environment for enhanced network stability and security, preventing routing loops and BGP hijacking.

  • Use case 2: Influencing traffic paths for active/standby architectures

    BGP route policies are used to influence preferred BGP routes by dynamically modifying the MED attribute for incoming traffic or using AS-PATH prepending to deprioritize routes. This helps optimize traffic distribution and manage active/standby interconnects without altering on-premises hardware.

  • Use case 3: Solving asymmetric routing with BGP communities

    Customers are using BGP route policies to match specific BGP communities, allowing Cloud Router to adjust route preference via MED manipulation. This ensures return traffic flows symmetrically through stateful firewalls or network appliances on-premises.

Read the original announcement →

https://cloud.google.com/blog/products/networking/bgp-route-policies-top-3-use-cases-by-customer-demand/

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