ACI (Cisco Application Centric Infrastructure)

Definition

Cisco Application Centric Infrastructure (ACI) is an artful, software-based network architecture that focuses on application operation. ACI uses automated network and security policies to enable faster application operation and simpler IT management. It allows centralized control with open API access for programmability and integration.

More information (Wikipedia)

Operating principle

ACI works with an application profile that uses a declarative model and demand-driven approach to integrate applications and services into the network. The application profile describes what a specific application requires in terms of resources, connectivity, and service demands. ACI then translates these requirements into network policies and ensures that the infrastructure meets the application demands. ACI network policies can be implemented independently of the physical topology.

Practical examples

• Data center networks for controlling cloud services
• Enterprise networks for providing Software-as-a-Service (SaaS) applications
• Hosted service providers who need scalable and flexible networks

Advantages

• Facilitates the management and orchestration of applications and services
• Increases the speed of application deployment
• Reduces manual configuration effort and the associated errors
• Improves network security through application segmentation
• Enables infrastructure-independent application execution
• Supports multi-tenant environments for efficient resource utilization
• Offers programmability and integration with open API access
• Reduces operating costs through automation

challenges

• Initial costs and complexity of implementation
• Demand for specially trained network technicians
• Need for changes in processes and management structures
• Risks of inadequate planning and inefficient resource allocation
• Level of abstraction can lead to a lack of knowledge about specific network services
• Compatibility issues with non-Cisco devices
• Requirements for network security can be complex
• The application profile must be constantly updated and coordinated

Best Practices

• Plan your implementation thoroughly to determine resource requirements
• Train your network team to develop compatible skills
• Implement automation where it makes sense
• Keep the application profiles up to date and aligned with business requirements
• Use segmentation to increase security
• Consider your network as a service and manage it accordingly
• Keep an eye on network performance and health
• Scale your infrastructure to keep up with the demands of your applications

Conclusion

Cisco's ACI offers a flexible and scalable solution for controlling networks with a focused application approach. With thorough planning and implementation, proper training, and efficient application of best practices, ACI can provide real value for businesses by improving the speed, security, and efficiency of network services and application deployments. Despite initial challenges, ACI has the potential to be an effective solution for modern network requirements.