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Figure 4-27. The IGMP Configuration Menu
Multicasting is used to support real-time applications such as video
conferencing or streaming audio. IGMP (Internet Group Multicast
Protocol) allows you to query for any attached hosts who want to
receive a specific multicast service. The switch looks up the IP
Multicast Group used for this service and adds any port, which
received a similar request to that group. It then propagates the
service request on to any neighboring multicast switch to ensure
that it will continue to receive the multicast service.
By supporting IGMP (Internet Group Management Protocol)
Snooping, the switch can forward multicast traffic intelligently.
Packets are forwarded to the ports that belong to the multicast
group instead of being
broadcast to all ports and possibly disrupting network performance.
This lookup table reflects the multicast group(s) (up to 32)
configuration of your system and provides an overview of the
port(s) map to each multicast group.
User Authentication
Figure 4-28. The User Authentication Menu