Network parameters such as latency, jitter and packet drop affect the user experience of HDX users. Quality of Experience (QoE) is introduced to help the users understand and check their ICA quality of experience. QoE is a calculated index, which indicates the ICA traffic performance. The users can tune the rules and policy to improve the QoE.
The QoE is a numeric value between 0–100, the higher the value the better the user experience. QoE is enabled by default for all ICA / HDX applications.
The parameters used to calculate QoE is measured between the two SD-WAN appliances at the client side and server side and not, end to end, between the sever and the client. Latency, jitter and packet drop are measured at the flow level and it could be different from the statistics at the link level. The end host (client or server) application may never know that there is a packet loss on the WAN. If the retransmit succeeds, the flow level packet loss rate is lower than the link level loss. However, as a result, it may increase latency and jitter a bit.
Default configuration for HDX traffic enables SD-WAN to re-transmit packets, thus improves the QoE index value that was lost due to packet loss in the network.
In the SD-WAN Center dashboard, you can view a graphical representation of the overall quality of HDX applications. The HDX applications are classified into the following three quality categories:
A list of the bottom five sites with the least QoE is also displayed in the NetScaler SD-WAN Center dashboard.
A graphical representation of the QoE for different time intervals allows you to monitor the performance of HDX applications at each site.
For more information, see SD-WAN Center Dashboard.
You can also view the detailed HDX reports of each site on the NetScaler SD-WAN Center. For more information see, How to View HDX Reports.