Dell Precision R5400 Manual

Also see for Precision R5400: Brochure Technical guide Setup and quick reference guide Specifications Manual

Contents

TER0806005 Issue 1 7Network Capacity – is the capacity of the network to forward packets, described in bits per second. Networksmay have any number of capacity constrictions, including link-rates between switches, or internal switchinglimits of the switches themselves. This term is used in this document to describe the ability of the network toforward network data relative to the link planning bandwidth.Device Bandwidth Limit – is a configuration parameter in PCoIP hosts and portals that is a hard upperbandwidth limit between the PCoIP hosts and portal pairs for downstream (host to portal) and upstream (portalto host) traffic. This feature is available for advanced IT configurations, and it is recommended that the defaultsetting (disabled) be used in most environments. Disabling the Device Bandwidth Limit allows the PCoIP hostand portal pair to make optimal use of the available network resources.While the Device Bandwidth Limit is normally disabled, an IT administrator may use the setting to get a feel forthe relationship between used network bandwidth and user experience. Through experimentation with contenttypically seen by the user, the IT person may find that the network bandwidths described in this document aretoo conservative and adjust the values accordingly.Device Bandwidth Target - is a configuration parameter in the PCoIP host and portal that defines thebandwidth that each attempts to maintain when the network is congested. This setting allows IT administratorsto set a soft bandwidth floor for all users to improve the fair distribution of bandwidth when the network iscongested. When the network is not undergoing congestion, the PCoIP devices will adapt to use availablebandwidth as required, up to the Device Bandwidth Limit. The Device Bandwidth Target should be set to thePlanning Bandwidth to ensure that each user maintains a minimal acceptable experience level in a constrainednetwork scenario.Peak Bandwidth - is the maximum bandwidth for a given user PCoIP host and portal pair. Since PCoIP onlytransmits changes in the user’s display, large screen change results in a burst of network traffic. The peak isdefined by the display resolution and the number of pixels changing at a given time. The Device BandwidthLimit may be set to impose a limit on the peak bandwidth.Average Bandwidth – is the average bandwidth for a given user PCoIP host and portal pair over a long periodof time. The average bandwidth is very application and user dependent but is typically a small fraction of thepeak bandwidth.Segment the User BasePCoIP network requirements are highly dependant on the usage scenario, ranging from plain text data entry to3D CAD. To understand the optimal network size and networking settings, IT administrators need to use theirunderstanding of the user base. Table 1 shows common user types and associated profiles.Table 1: Example User Segmentation to Optimize Network Resource AllocationUser Category User ProfileTask Worker Primarily text entry into forms.Knowledge Worker/Basic CADUses standard office applications such as word processing, spreadsheets, andpresentation tools, uses web, reads and writes emails, and simple CAD applications etc.Performance User/3D ModelingSimilar to the Knowledge Worker user profile with the exception of occasional use ofhigh-end visual applications, 3D modeling and may perform analysis on static images.Video Editing Similar to performance user, but requires consistent high-quality multimedia playback.Extreme User Discerning users of high-end visual applications such as 3D modeling, video editing oranimation. Typically content has a higher resolution and the user performs technicalanalysis by dynamically manipulating images.