What is the maximum number of forwarding rules for ILBs per peering group?

The maximum number of forwarding rules for Internal Load Balancers (ILBs) per peering group is 175. This limit is established to ensure efficient resource management and to maintain optimal performance within the Google Cloud environment. Each forwarding rule is associated with a specific backend service and helps to route traffic to the appropriate virtual machine instances.

In practice, having a defined limit like 175 forwarding rules encourages architects and engineers to design scalable and maintainable network architectures. They can optimize their load balancing configurations by ensuring that their services are effectively managing traffic without exceeding these operational thresholds. Furthermore, understanding this limit helps in planning workloads and deployments effectively, especially in scenarios that involve high availability and resilience.

This limit is important for users who might be planning to implement load balancers on a significant scale, ensuring that their solutions will perform reliably under the constraints of the platform.