Configuring A Vlan Tag For Query Messages - H3C S3100 Series Operation Manual

When receiving an IGMP general query, the simulated host responds with an IGMP report.
Meanwhile, the switch sends the same IGMP report to itself to ensure that the IGMP entry does not
age out.
When the simulated joining function is disabled on an Ethernet port, the simulated host sends an
IGMP leave message.
Therefore, to ensure that IGMP entries will not age out, the port must receive IGMP general queries
periodically.
Table 2-16 Configure a port as a simulated group member
Operation
Enter system view
Enter Ethernet port view
Configure the current port as a
simulated multicast group member
Before configuring a simulated host, enable IGMP Snooping in VLAN view first.
The port to be configured must belong to the specified VLAN; otherwise the configuration does not
take effect.
You can use the source-ip source-address command to specify a multicast source address that
the port will join as a simulated host. This configuration takes effect when IGMPv3 Snooping is
enabled in the VLAN.

Configuring a VLAN Tag for Query Messages

By configuring the VLAN in which IGMP general and group-specific queries forwarded and sent by
IGMP Snooping switches are transmitted, you can enable multicast packet forwarding between different
VLANs In a Layer-2 multicast network environment.
Table 2-17 Configure VLAN Tag for query message
Operation
Enter system view
Enable IGMP Snooping
Configure a VLAN tag for query
messages
Command
system-view
interface interface-type interface-number
igmp host-join group-address
[source-ip source-address ] vlan vlan-id
Command
system-view
igmp-snooping enable
igmp-snooping vlan-mapping
vlan vlan-id
2-13
Remarks
—
—
Required
Simulated joining is disabled
by default.
Remarks
—
Required
By default, IGMP Snooping is
disabled.
Required