ZIV SWT User Manual
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Contents
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SWTGIGABIT/FAST ETHERNET SWITCH TYPE SWT 77/137USER GUIDE - M0SWTA1903Iv09 - V09 March 2019Forward All Groups:The equipment allows manual configuration of this special address individually for eachinterface.• #. It establishes the equipment physical port number.• Forward All. Indicates the status of the special group address for thecorresponding interface. Valid values are Normal, Fixed and Forbidden. TheNormal option is the default option. It indicates that the spread or not of themulticast traffic is subjected to there being a client equipment that requested theregister for the group address. The Fixed option means that the interface willpropagate all multicast traffic, and GMRP messages concerning the group addressis ignored. The Forbidden option assumes that requests won´t be accepted by theclient equipment for the group address, and that only the multicast traffic registeredin the interface will be treated.5.13.3 IGMPThe IGMP Snooping is an optimization to be used in level 2 equipment, such as the SWT.The IGMP protocol is level 3; therefore, the IGMP Snooping operation performed by theswitch is conditioned by the presence of a Multicast router in the network.The SWT includes a special feature if there is NO multicast router in the network, and if theIGMP Snooping operation has to be active. Said feature implies that the switch itselfemulates the presence of a multicast router, by periodically consulting the clients aboutbelonging to the different multicast diffusion groups.The configuration parameters are the following:IGMP:There is a single parameter that determines whether the emulation as IGMP router is activeor not:• Enable. A simple CheckBox parameter to indicate if the IGMP periodic consultationservice is active or not. |
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