In today’s hyper-competitive environment, organizations need their applications to respond quickly to users’ changing needs. But applications are not just about software – they need both agile network support and Layer 4-7 services to provide the performance and availability users demand. A new white paper from Citrix looks at how organizations can use software-defined networking (SDN) in conjunction with application delivery networks (ADNs) to get the most out of the applications they rely on.
SDN can improve network agility by incorporating network automation in cloud computing platforms. Just as in conventional networks, SDN-enabled networks need Layer 4-7 network services to ensure performance and availability, make efficient use of IT resources, and thwart hackers. ADNs are responsible for Layer 4-7 capabilities such as application availability, performance, security and visibility. To deliver applications in a way that meets performance and availability requirements, the paper argues ADN services should be integrated with cloud computing platforms and SDN.
Implementing Layer 4-7 services in traditional data centers is cumbersome and time-consuming: requisite network appliances have to be purchased, installed, and cabled together manually and in the correct order. SDN overcomes these challenges through service insertion and service chaining.
The white paper describes the most common SDN models, identifies use cases, and highlights ways to integrate services in ADNs. With a focus on Citrix’s NetScaler SDX App Delivery Controller (ADC) platform, which can integrate with SDN and cloud orchestration systems, the paper outlines key considerations for running network services in a virtualized environment:
- Optimize provisioning: Virtualized network services must integrate with the orchestration platform so they auto-deploy, auto-configure, and auto-scale.
- Optimize placement: Placement and availability of services should be aligned with that of the application itself.
- Service chaining: This should be implemented to minimize traffic repeatedly going into and out of a device, a.k.a. hair-pinning.
- Service placement: No individual fault zone should have the potential to become a single point of failure.
Without SDN, application delivery networking requires a complex infrastructure. The paper explains how NetScaler SDX unifies all types of Layer 4-7 network services onto one platform to simplify this infrastructure and drive application intelligence across the entire network.
Read the white paper to learn more.