Multicast provides applications with the ability to send a single stream, such as a video transmission, to multiple network hosts at the same time. Multicast is designed to save bandwidth resources on the network and server resources by requiring both to manage only one stream for a group of hosts rather than one stream per host. Most network switches default to broadcasting multicast to all ports, consuming large amounts of resources and defeating the purpose of multicast. Configure IGMP and IGMP Querier on an HP Procurve switch to enable proper management of multicast.
Step 1
Click the "Start" button on the Windows 7 computer, then click the "Search" box and type "cmd." Right-click the command line icon that appears and click "Run as Administrator" in the menu that appears.
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Step 2
Type "telnet 1.2.3.4" replacing "1.2.3.4" with the IP address of the HP Procurve switch. Press the "Enter" key. Type the telnet password on the command prompt when requested and press the "Enter" key.
Step 3
Type "enable" on the command prompt and press the "Enter" key. Type the Manager or Administrator password when prompted and press the "Enter" key.
Step 4
Type "vlan 1 IP igmp" to enable IGMP Snooping on the default VLAN 1 of the switch. Repeat the command, replacing "1" with another VLAN number, for each VLAN configured on the switch that must support multicast traffic.
Step 5
Type "vlan 1 IP igmp querier" to enable IGMP Querier on the default VLAN 1 of the switch. Only enable IGMP Querier if the switch is not connected to a router or switch that has multicast routing enabled. Repeat the command, replacing "1" with another VLAN number, for each VLAN configured on the switch that must support multicast traffic and is not connected to a router or switch with multicast routing enabled.
Step 6
Type "exit" at the command prompt and press the "Enter" key. Type "write memory" and press the "Enter" key to save the configuration.
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