- Transport adaptatif
Adaptive transport is a new data transport mechanism for XenApp and XenDesktop. It is faster, more scalable, improves application interactivity, and is more interactive on challenging long-haul WAN and internet connections. Adaptive transport maintains high server scalability and efficient use of bandwidth. By using adaptive transport, ICA virtual channels automatically respond to changing network conditions. They intelligently switch the underlying protocol between the new Citrix protocol called Enlightened Data Transport (EDT) and TCP to deliver the best performance. It improves data throughput for all ICA virtual channels including Thinwire display remoting, file transfer (Client Drive Mapping), printing, and multimedia redirection. The same setting is applicable for both LAN and WAN conditions.
When set to Preferred, data transport over EDT is used as primary and fallback to TCP.
By default, adaptive transport is disabled (Off) and TCP is always used.
For testing purposes, you can set Diagnostic mode, in which case only EDT is used, and fallback to TCP is disabled.
Citrix SD-WAN WAN optimization (WANOP) offers cross-session tokenized compression (data deduplication), including URL-based video caching. WANOP provides significant bandwidth reduction if two or more people at the office location watch the same client-fetched video, or transfer or print significant portions of the same file or document. Furthermore, by running the processes for ICA data reduction and print job compression on the branch office appliance, WANOP offers VDA server CPU offload and enables higher XenApp and XenDesktop server scalability.
Important: When TCP is used as the data transport protocol, Citrix WANOP supports the optimizations described in the previous paragraph. When using Citrix WANOP on network connections, choose TCP. By using TCP flow control and congestion control, WANOP ensures equivalent interactivity to EDT at high latency and moderate packet loss.
To confirm that the policy setting has taken effect:
In Director, Session Details > Connection Type displays the policy settings. Look for Connection type HDX. If the protocol is UDP, EDT is active for the session. If the protocol is TCP, the session is in fallback or default mode. If the Connection type is RDP, ICA is not in use and the protocol is n/a. For more information, see Monitor sessions.
This example illustrates that EDT over UDP is active for the session. Type CtxSession.exe in the command line.
C:\Program Files (x86)\Citrix\System32>CtxSession
Session 2 Transport Protocols: UDP -> CGP -> ICA
To see verbose statistics, use the -v switch: