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TigerSwitch 10/100/1000 - SMC

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MULTICAST CONFIGURATION<br />

CLI – This example adds a trap manager and enables authentication traps.<br />

Console(config)#snmp-server host <strong>10</strong>.1.19.23 batman 3-46<br />

Console(config)#snmp-server enable traps authentication 3-48<br />

Multicast Configuration<br />

Multicasting is used to support real-time applications such as video<br />

conferencing or streaming audio. A multicast server does not have to<br />

establish a separate connection with each client. It merely broadcasts its<br />

service to the network, and any hosts that want to receive the multicast<br />

register with their local multicast switch/router. Although this approach<br />

reduces the network overhead required by a multicast server, the broadcast<br />

traffic must be carefully pruned at every multicast switch/router it passes<br />

through to ensure that traffic is only passed on the hosts which subscribed<br />

to this service.<br />

This switch uses IGMP (Internet Group Management Protocol) to query<br />

for any attached hosts that want to receive a specific multicast service. It<br />

identifies the ports containing hosts requesting to join the service and<br />

sends data out to those ports only. It then propagates the service request<br />

up to any neighboring multicast switch/router to ensure that it will<br />

continue to receive the multicast service. This procedure is called multicast<br />

filtering.<br />

2-69

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