Application-delivery solutions that use service modules or switches have required complex configurations and changes in the networking stack. Cisco Remote Integrated Service Engine (RISE) technology can logically integrate a Citrix NetScaler application delivery controller (ADC) with a Cisco Nexus 7000 Series switch as a virtual service module. The integration eliminates the complexities and limitations of traditional inline and one-arm mode configurations. The NetScaler functionality is available as a centralized resource that can be leveraged across the application infrastructure supported by the Cisco Nexus 7000 series switch. The RISE integration provides a service module's streamlined deployment and simplified configuration and operation, and the complete NetScaler application-delivery capabilities that can accelerate application performance for all users.
An ADC deployed in an inline mode can create a bottleneck in the data center. Today, data-center traffic can handle traffic in the terms of terabytes per second, but the ADC capacity can scale up only to gigabytes per second range. The NetScaler ADC, with the new capability to integrate with Cisco Nexus 7000 switch using RISE, can be deployed in a one-arm mode and can provide ADC capabilities to data-center traffic with minimal configuration and maintenance overhead.
A one-arm mode deployment uses Source NAT (SNAT) and Policy Based Routing (PBR) to send only the necessary traffic through the ADC. With SNAT, the servers do not have visibility of client IP addresses. PBR resolves this issue, but it requires complex, manual configuration and is prone to errors. The Automatic Policy Based Routing (APBR) feature in RISE eliminates the need for Source NAT or manual PBR configuration in a one-arm mode design.