to the ongoing virtualization of data center infrastructure and integrating cloud computing resources allows to be able to move these environments dynamically and monitor workloads.
The data center networks have to encompass thousands of devices, existing network architectures for fast deployment of applications have proved inadequate and unable to hold a position with the agility requirements of today's business step.
Software Defined Networking (SDN) was a solution supported for dynamic provisioning and automatic configuration of network resources for applications are used. Recently SDN has beyond theory to practical reality, as open standards and growing interoperability between vendors are driving rollouts of new skills.
moved Evolving to an Infrastructure Application Centric
With ACI Cisco provides a distributed, policy-based approach to SDN, based on the concept of declarative control is based. "Declarative control requires that each object is asked to achieve a desired state, and makes a promise to achieve this state, without strictly speaking, do as" as Cisco. As a result, "underlying objects treat their own configuration state changes and are responsible only for exceptions or errors passed back to the controller. This approach reduces the burden and complexity of the control system and allows a greater scale."
This new policy to allow approach Cisco's efforts led to create open policy protocol, which was filed as an Internet Engineering task Force draft and was has with Intel, Microsoft, Red, Citrix, F5, Canonical and Embrane co-developed the OpFlex. OpFlex comes from Cisco Application Centric Infrastructure vision and strategy. In Cisco believes previous efforts SDN were to implement is limited, because they mimic an old model of networking, which focuses on individual network elements.
work as a high-performance resource pool that can be provided instantly and automatically in accordance with the requirements of the application and related IT policies certainly pervasive throughout the ACI Reich, network, compute and storage. It will provide a centralized management for the integrated needs of application, network and security administrators.
Cisco ACI is built on a mesh designed management automation, policy and programmatic effort "workload everywhere" to support models. At its heart is the Cisco Application Policy Infrastructure Controller (APIC), centralized policy management and control point for the entire infrastructure. This is where other services are bound in the ACI-Architecture.
The role of Delivery Controller application
unroll as organizations ACI-based SDNs, they have a to implement efficient and effective approach to distribute load balance incoming traffic between servers in the same application hosting and not to prevent any application server to a single point of failure. As Web sites over static content moving dynamic application deployment, users must be connected to a variety of criteria to application servers knowledge using policies and advanced application level to support business needs. This application-aware distribution capability is a key element in the ACI-Architecture.
Citrix found its NetScaler product line to provide a more efficient and effective approach available, the old server load balancer with an Application Delivery Controller replace (ADC). The Citrix NetScaler ADC combines Layer 4 through 7 load balancing, high-speed data compression, content caching, SSL acceleration, application flow visibility and a powerful application in one easy-to-use platform firewall.
NetScaler uses the Cisco APIC programmatically automate network provisioning and control based on application requirements and guidelines for both data centers and enterprise environments. "This gives our customers what they wanted, they will be able to run load balancers and firewalls in accordance with their application servers and spin-up and eliminate a configuration," says Steve Shah, Sr. Director of Product Management at Citrix. "You do not have to individually look after thousands of load balancers or firewalls in the process configuration, because they can automate two or three configurations."
Cisco APIC can distribute new guidelines for ADC in minutes dynamically, without required changed the network manually. The integration between Cisco APIC controller and the NetScaler ADC is REST-based open APIs achieved. A NetScaler "Device Package" introduced by the APIC Controller enables detailed feature-level configuration of NetScaler ADC perform services. This allows a complete automation and orchestration of critical services required in the education of applications in a fast, secure and reliable manner. Moreover, these applications can run on any type of device and cause anywhere in the customer's environment without disruption to the network.
ACI Deployment-ready options
ACI moved SDN beyond theory to advanced implementation, while the existing infrastructure accommodates. On a practical level, virtual or physical servers on existing Cisco Nexus networks can in the ACI fabric using the Cisco APIC participate Guidelines for Deploying and ACI forwarding mechanisms both on the new ACI (Nexus 000-based) and existing Nexus fabric ( . allow Nexus 3000 -7000)
NetScaler and ACI integration provides several important advantages for data centers:
• NetScaler physical and virtual appliances can be configured from a single location, automatically
• changes to configurations automatically pushed out to all appropriate NetScaler appliances
• customers can use the advanced features of NetScaler, for better application delivery
use is NetScaler of failsafe path to ACI
is, if ACI is in your immediate future or even a distant goal, the demand for 100% application availability, improved end-to-end performance, advanced application-layer attack protection and improved server efficiency now and Citrix NetScaler is the logical choice.
Citrix NetScaler is the only controller delivery application integrates with full Unified Fabric Cisco. The Citrix NetScaler is recommended by Cisco as a replacement product for the end-of-life Cisco ACE and provides a smooth migration path for Cisco ACE GSS and CSS customers.
NetScaler includes tightly integrated physical and virtual devices. The highest level of security and performance for tomorrow Application Centric Infrastructure
more information, see Citrix and Cisco Partnership [1945002heutigengeschäftskritischeWeb-AnwendungenundbietetgleichzeitigeineGrundlagefürKernLoad-Balancing-Fähigkeitenundliefern]
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