H3C S9500 Series Operation Manual

Also see for S9500 Series: Operation manual Operation manual Operation manual Operation manual Operation manual

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H3C S9500 Series Operation Manual Manual pdf 11 page image

Operation Manual – IGMP SnoopingH3C S9500 Series Routing Switches Chapter 1 IGMP Snooping Configuration1-9Note:z IGMP Snooping must be enabled globally before it can be enabled in a VLAN.z When you enable IGMP Snooping in a specified VLAN, this function takes effect forEthernet ports in this VLAN only.z After enabling IGMP Snooping in a VLAN, you cannot enable IGMP and/or PIM onthe corresponding VLAN interface, and vice versa.1.3.3 Configuring the Version of IGMP SnoopingBy configuring the IGMP Snooping version, you actually configure the version of IGMPmessages that IGMP Snooping can process.z IGMP Snooping version 2 can process IGMPv1 and IGMPv2 messages, but notIGMPv3 messages, which will be flooded in the VLAN.z IGMP Snooping version 3 can process IGMPv1, IGMPv2 and IGMPv3 messages.Follow these steps to configure the version of IGMP Snooping:To do... Use the command... RemarksEnter system view system-view —Enter VLAN view vlan vlan-id —Configure the version ofIGMP Snoopingigmp-snooping versionversion-numberOptionalVersion 2 by defaultCaution:If you switch IGMP Snooping from version 3 to version 2, the system will clear all IGMPSnooping forwarding entries from dynamic joins, and will:z Keep forwarding entries for version 3 static (*, G) joins;z Clear forwarding entries for version 3 static (S, G) joins, which will be restored whenIGMP Snooping is switched back to version 3.For details about static joining, refer to Configuring Static Ports.1.3.4 Configuring the Function of Dropping Unknown Multicast DataUnknown multicast data refers to multicast data whose forwarding entries do not existin the IGMP Snooping forwarding table: