Recommended Settings Of Network Switches - G&D ControlCenter-IP Installationsanleitung

Selecting a switch
 Ensure sufficient performance of the network switch:
regarding forwarding bandwidth, switching bandwidth and forwarding performance and
calculate the expected values of your IP matrix switch installation in advance.
Parameters such as the size of the MAC address table and the packet buffer memory can
have a significant impact on the performance.
 Avoid bottlenecks when using multiple network switches:
tributed across more than one switch, the connection between the switches may be
a bottleneck.
Define the multicast streams required at the same time in advance and plan the
network topology accordingly.
IMPORTANT: Note that the computer modules (
the switch on which the IGMP Snooping Querier is running.

Recommended settings of network switches

Make the following settings in the network switches to ensure a smooth operation of
the IP matrix:
 Activation of »Fast Leave«/»Immediate Leave«:
sends an IGMP leave packet to the switch, the switch shortly continues to send the
multicast group to the port.
This leads to image interferences when switching from one multicast group to another
because for a short time both multicast streams are sent to the port.
IMPORTANT: Activate Fast Leave/Immediate Leave to disable the multicast stream
immediately.
 Deactivation of »Spanning Tree TCN Flooding«:
use, spanning tree is used to ensure (loop avoidance) that only one data path exists
at a time.
If a new data path is detected, the switch briefly activates the TCN flooding (topology
chance notification). In this case multicast groups are flooded to all ports. This leads
to image interferences at the user modules (
nected to a multicast stream of a computer module (
IMPORTANT: Disable Spanning Tree TCN flooding for the ports to which IP matrix
devices are connected.
 DSCP/QoS: IP KVM traffic can be prioritised over other network traffic. In over-
load situations, a strict priority prevents the loss of KVM data.
6 · G&D ControlCenter-IP
Check the switch's specifications
If the IP end devices are dis-
) should be connected to
IP-CPU
If a user module module (
When multiple network switches are in
IP-CON ), which are currently con-
IP-CPU ).
IP-CON )