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Dominion KX II - FAQ
© 2010 Raritan Inc. Page 5 of 20 V1098 R2 January 2010
Question Answer
Ethernet and IP Networking
How is bandwidth used in
KVM-over-IP systems?
Dominion KX II offers next-generation KVM-over-IP technology – the
very best video compression available. Raritan has received numerous
technical awards confirming its high video quality transmissions and the
low bandwidth utilization.
The Dominion KX II digitizes, compresses and encrypts the keyboard,
video and mouse signals from the target server and transmits IP
packets over the IP network to the remote client to create the remote
session to the user. The KX II provides an at-the-rack experience based
on its industry-leading video processing algorithms.
Screen changes, i.e., video accounts for the majority of the bandwidth
used – and keyboard and mouse activity are significantly less.
It is important to note that bandwidth is only used when the user is
active. The amount of bandwidth used is based on the amount of
change to the server’s video display screen.
If there are no changes to the video – the user is not interacting with the
server – there is generally no bandwidth used. If the user moves the
mouse or types a character, then there is a small amount of bandwidth
used. If the display is running a complex screen saver or playing a
video, then there can be a larger amount of bandwidth used.
How does bandwidth affect
KVM-over-IP performance?
In general, there is a trade-off between bandwidth and performance.
The more bandwidth available, the better performance can be. In limited
bandwidth environments, performance can degrade. The Dominion
KX II has been optimized to provide strong performance in a wide
variety of environments.
What factors affect
bandwidth?
There are many factors that determine how much bandwidth will be
used. The primary factor, noted above, is the amount of change in the
target server’s video display. This is dependent on the user’s task and
actions.
Other factors include the server’s video resolution, networking speed
and characteristics, client PC resources and video card noise.
The Dominion KX II has very sophisticated video processing algorithms
that optimize bandwidth and performance for a variety of environments.
In addition, they are highly configurable; there are many settings to
optimize bandwidth usage. In particular, the connection speed setting in
the remote clients (VKC, MPC) can be set to reduce the bandwidth
used.
Unlike KX I, the Noise Filter parameter does not generally have a large
role in reducing bandwidth or improving performance.