Cisco Cisco ACE Application Control Engine Module Informationshandbuch
FAQ
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Cisco Application Visibility and Control (AVC)
Q. What is Cisco Application Visibility and Control?
A. Cisco Application Visibility and Control (AVC) is a solution that uses multiple technologies and management
tools that, when working together, provides a powerful and pervasive integrated solution for application
visibility and control based on stateful deep packet inspection (DPI).
Q. How does AVC work?
A. With the Cisco AVC solution, Cisco wireless controllers can identify applications within the traffic flow using
DPI technology and mark it with certain differentiated services code point (DSCP) value. It can collect various
wireless performance metrics such as bandwidth use in terms of applications and clients. Then, using quality
of service (QoS), routers/switches can reprioritize critical applications or deny an application
’s bandwidth use.
Q. What technology is used in the AVC solution?
A. Cisco AVC consists of the following technologies:
●
Network-Based Application Recognition Version 2 (NBAR2), next-generation DPI technology that can
identify more than 1000 applications and support application categorization, with the ability to update the
protocol definition.
●
NetFlow Version 9 export to select and export data of interest, allowing easy consumption of application
performance statistics by Cisco and third-party applications.
●
Reporting and management tools, such as Cisco Prime
™
Infrastructure with Assurance module, an
enterprise-grade infrastructure and service-monitoring tool for reporting of application and network
performance that can provide up to 30 different reports for application visibility.
●
QoS to facilitate the control of application performance.
Q. Why AVC is important in a wireless network?
A. A wireless network is a shared medium, which means that if a user downloads or uploads a huge amount of
traffic over the wireless network, that user might consume a disproportionately large amount of the wireless
network bandwidth, thereby adversely affecting the performance of other users. If that user happens to
upload/download non-business-critical data while other users are trying to access business-critical
applications, their productivity will be lost. In order to prioritize the enterprise
’s business-critical applications
over the non-business-critical applications, AVC plays a primary role in recognizing, reporting, and controlling
the applications that are accessed over the wireless network. It also helps with wireless network capacity
planning and troubleshooting.
Q. Which wireless controllers support AVC?
A. AVC is currently supported on Cisco 2500, 5500, and 8500 Series Wireless Controllers; Cisco Flex 7500
Series Wireless Controllers; and Cisco Wireless Services Module 2 (WiSM2) when deployed in central mode
(formerly local mode running AireOS Version 7.4 or greater).
Q. Do customers need a special license to use the AVC feature over a Cisco wireless network?
A. No.