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Citrix XenApp 7.x Performance Essentials

You're reading from   Citrix XenApp 7.x Performance Essentials Tune and optimize the performance of your farms with the new improved XenApp® architecture.

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Product type Paperback
Published in Aug 2014
Publisher
ISBN-13 9781782176114
Length 120 pages
Edition 1st Edition
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Author (1):
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Luca Dentella Luca Dentella
Author Profile Icon Luca Dentella
Luca Dentella
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Toc

Optimizing the ICA® protocol


The ICA protocol is a proprietary protocol designed by Citrix and is used for client/server communication in XenApp and XenDesktop. It runs over TCP port 1494, but it may be encapsulated in Common Gateway Protocol (CGP) over TCP port 2598 when using Session Reliability (recommended with XenApp 7.5, as stated in the Chapter 3, Monitor and Optimize End User Experience). You'll learn the importance of CGP later in this chapter.

ICA® virtual channels

The ICA protocol comprises virtual channels, as shown in the following diagram. A virtual channel consists of a driver running on the client side; it communicates with a server-side application. It transports data for redirected peripherals (keyboard, printer, and so on) or for Citrix functionalities (clipboard, licensing, and so on). A couple of channels are also available for Original Equipment Manufacturers (OEMs).

Virtual Channels in the ICA protocol

Virtual channel priorities

The ICA protocol implements an internal Quality...

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