3Com 2928 User Guide - Page 289
Configuring IGMP Snooping Port Functions, Description, Network, IGMP Snooping, Advanced,
UPC - 662705557113
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Item Drop Unknown Querier Query interval Description Enable or disable the function of dropping unknown multicast packets. Unknown multicast data refer to multicast data for which no entries exist in the IGMP snooping forwarding table. z With the function of dropping unknown multicast data enabled, the switch drops all the unknown multicast data received. z With the function of dropping unknown multicast data disabled, the switch floods unknown multicast data in the VLAN to which the unknown multicast data belong. Enable or disable the IGMP snooping querier function. On a network without Layer 3 multicast devices, no IGMP querier-related function can be implemented because a Layer 2 device does not support IGMP. To address this issue, you can enable IGMP snooping querier on a Layer 2 device so that the device can generate and maintain multicast forwarding entries at data link layer, thereby implementing IGMP querier-related functions. Configure the IGMP query interval. Return to IGMP snooping configuration task list. Configuring IGMP Snooping Port Functions Select Network > IGMP Snooping in the navigation tree to enter the basic configuration page and then click the Advanced tab to enter the page shown in Figure 1-5. Figure 1-5 Advanced configuration Table 1-4 describes items for configuring advanced IGMP snooping features. 1-7
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