PCoIP Technology User Guide
16
6 Bandwidth
Considerations
Bandwidth requirements in PCoIP Systems
depend on users’ applications and the kind of
experience they require. This section describes
some considerations for bandwidth
configuration.
Bandwidth Usage
PCoIP Systems have four general sources of
bandwidth usage:
•
Host to Portal imaging data – dominates
bandwidth
•
HD Audio streams – typically use significantly
less bandwidth than imaging data
•
USB bridging – typically uses significantly
lower bandwidth than imaging data
•
System management – uses relatively
negligible bandwidth
Imaging Bandwidth
As PCoIP Technology’s imaging data dominates
PCoIP System network bandwidth use, it’s
important to understand these characteristics:
•
Only changing screen areas generate imaging
related network traffic
•
Because lower-resolution displays have fewer
possible pixel changes, they usually require
less bandwidth than high-resolution displays
•
The most demanding imaging is high-
resolution, high-contrast, full-screen moving
images (e.g. video games, real-time 3D
rendering)
•
If desired, PCoIP Technology can be
configured to use less bandwidth (with a
possible reduction in user experience)
•
Long periods with no pixel changes result in
low average network traffic
Audio and USB Bandwidth
Audio and USB considerations:
•
Audio compression can be enabled to reduce
bandwidth during network congestion
•
USB data is not compressed
Bandwidth Priorities
PCoIP System bandwidth priorities are:
1.
USB and audio (highest)
2.
Imaging (uses remaining available
bandwidth)
Bandwidth Configuration
The Administrative Web Interface’s
Bandwidth
webpage has two bandwidth parameters
•
The Portal webpage defines Portal
→
Host
bandwidth.
•
The Host webpage defines Host
→
Portal
bandwidth.
Bandwidth paramaters can be set from 3 to 220
Mbps.
Figure 6-1: Bandwidth Webpage
The
Bandwidth
webpage has two parameters:
Device Bandwidth Limit
- limits maximum peak
bandwidth use
•
A value of 0 (zero) allows PCoIP Technology
to adjust for congestion (no congestion, no
limit)
•
Recommended setting: link limit (minus 10%
headroom) of network connected to Host and
Portal
Note: Device Bandwidth Limit is applied
immediately after clicking Apply.
Device Bandwidth Target
- a soft bandwidth limit
during congestion
•
Allows more even distribution of user
bandwidth on congested trunks
•
A value of 0 (zero) sets no target
