160 DOMINION KX II USER G UIDEEthernet and IP NetworkingQ UESTION A NSWERDoes the Dominion KXII offer dual gigabitEthernet ports to provideredundant fail-over, orload balancing?Yes. Dominion KX II features dual gigabit Ethernet ports to provideredundant failover capabilities. Should the primary Ethernet port (or theswitch/router to which it is connected) fail, Dominion KX II willfailover to the secondary network port with the same IP address –ensuring that server operations are not disrupted. Note that automaticfailover must be enabled by the administrator.How much bandwidthdoes Dominion KX IIrequire?Dominion KX II offers next generation KVM-over-IP technology – thevery best video compression available. Raritan has received numeroustechnical awards confirming its high video quality transmissions andthe low bandwidth utilization.Raritan pioneered the KVM-over-IP functionality that allows users totailor their video parameters to conserve network bandwidth. Forinstance, when connecting to Dominion KX II through a dial-upmodem connection, video transmissions can be scaled to grayscale –allowing users to be fully productive while ensuring high performance.With that in mind, the following data refers to Dominion KX II at itsdefault video settings – again, these settings can be tailored to a specificenvironment. They can be increased to provide even higher qualityvideo (color depth), or decreased to optimize for low-speedconnections.As a general rule, a conservative estimate for bandwidth utilization (atDominion KX II’s default settings) is approximately 0.5Mbit/secondper active KVM user (connected to and using a server), with veryoccasional spikes up to 2MBit/second. This is a very conservativeestimate because bandwidth utilization will typically be even lower.Bandwidth required by each video transmission depends on what task isbeing performed on the managed server. The more the screen changes,the more bandwidth is utilized. The table below summarizes some usecases and the required bandwidth utilization at Dominion KX II’sdefault settings on a 10Mbit/s network:Idle Windows Desktop 0 MbpsMove Cursor Around Desktop 0.18MbpsMove Static 400x600 Window/Dialog Box 0.35MbpsNavigate Start Menu 0.49MbpsScroll an Entire Page of Text 1.23MbpsRun 3D Maze Screensaver 1.55MbpsWhat is the slowestconnection (lowestbandwidth) over whichDominion KX II canoperate?33Kbps or above is recommended for acceptable KX performance overa modem connection.What is the speed ofDominion KX II’sEthernet interfaces?Dominion KX II supports Gigabit as well as 10/100 Ethernet. KX IIsupports two 10/100/1000 speed Ethernet interfaces, with configurablespeed and duplex settings (either auto-detected or manually set).
