HP 6125G HP 6125G & 6125G/XG Blade Switches IP Multicast Configuration - Page 39
Configuring multicast source port filtering on a port, Enabling dropping unknown multicast data
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Configuring multicast source port filtering on a port Step 1. Enter system view. 2. Enter Layer 2 Ethernet interface view. 3. Enable multicast source port filtering. Command system-view interface interface-type interface-number igmp-snooping source-deny Remarks N/A Use either command. Disabled by default. Enabling dropping unknown multicast data Unknown multicast data refers to multicast data for which no entries exist in the IGMP snooping forwarding table. When the switch receives such multicast traffic, one of the following occurs: • When the function of dropping unknown multicast data is disabled, the switch floods unknown multicast data in the VLAN that the unknown multicast data belongs to, causing network bandwidth waste and low forwarding efficiency. • When the function of dropping unknown multicast data is enabled, the switch forwards unknown multicast data to its router ports instead of flooding it in the VLAN. If no router ports exist, the switch drops the unknown multicast data. Configuration guidelines The configuration in IGMP snooping view and the configuration in VLAN view are mutually exclusive. Namely, after this function is enabled in IGMP snooping view, it cannot be enabled or disabled in VLAN view, and vice versa. Configuration procedure To enable dropping unknown multicast data globally: Step 1. Enter system view. 2. Enter IGMP-snooping view. 3. Enable dropping unknown multicast data. Command system-view igmp-snooping drop-unknown Remarks N/A N/A Disabled by default To enable dropping unknown multicast data in a VLAN: Step 1. Enter system view. 2. Enter VLAN view. 3. Enable dropping unknown multicast data. Command system-view vlan vlan-id igmp-snooping drop-unknown Remarks N/A N/A Disabled by default 28
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