Configuring A Vlan Tag For Query Messages - H3C S5100-SI Operation Manual

When an Ethernet port is configured as a simulated member host, the switch sends an IGMP report
through this port. Meanwhile, the switch sends the same IGMP report to itself and establishes a
corresponding IGMP entry based on this report.
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 2-17 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 IMGPv3 Snooping is
enabled in the VLAN.

Configuring a VLAN Tag for Query Messages

By configuring the VLAN tag carried in IGMP general and group-specific queries forwarded and sent by
IGMP Snooping switches, you can enable multicast packet forwarding between different VLANs In a
Layer-2 multicast network environment.
Follow these steps to configure VLAN tag for query message:
Table 2-18 Configure VLAN Tag for query message
Operation
Enter system view
Enable IGMP Snooping
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
2-12
Remarks
—
—
Optional
Simulated joining is disabled by
default.
Remarks
—
Required
By default, IGMP Snooping is
disabled.