H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – Multicast
H3C S7500E Series Ethernet Switches Chapter 2 IGMP Snooping Configuration
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 Note:
z IGMP Snooping must be enabled globally before it can be enabled in a VLAN.
z After enabling IGMP Snooping in a VLAN, you cannot enable IGMP and/or PIM on
the corresponding VLAN interface, and vice versa.
z When you enable IGMP Snooping in a specified VLAN, this function takes effect for
Ethernet ports in this VLAN only.
2.3.3 Configuring the Version of IGMP Snooping
By configuring an IGMP Snooping version, you actually configure the version of IGMP
messages that IGMP Snooping can process.
z IGMP Snooping version 2 can process IGMPv1 and IGMPv2 messages, but not
IGMPv3 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... Remarks
Enter system view
system-view
—
Enter VLAN view
vlan vlan-id
—
Configure the version of
IGMP Snooping
igmp-snooping version
version-number
Optional
Version 2 by default
Caution:
If you switch IGMP Snooping from version 3 to version 2, the system will clear all IGMP
Snooping forwarding entries from dynamic joins, and will:
z Keep forwarding entries for version 3 static (*, G) joins;
z Clear forwarding entries from version 3 static (S, G) joins, which will be restored
when IGMP Snooping is switched back to version 3.
For details about static joins, Refer to
Configuring Static Ports.
2.4 Configuring IGMP Snooping Port Functions
2.4.1 Configuration Prerequisites
Before configuring IGMP Snooping port functions, complete the following tasks: