Configuring A Vlan Tag For Query Messages - 3Com 4500 Configuration Manual

Therefore, to ensure that IGMP entries will not age out, the port must receive IGMP general queries
periodically.
Follow these steps to configure a port as a simulated group member:
To do...
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 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:
To do...
Enter system view
Configure a VLAN tag for query
messages
It is not recommended to configure this function while the multicast VLAN function is in effect.
Use the command...
system-view
interface interface-type
interface-number
igmp host-join group-address
[ source-ip source-address ]
vlan vlan-id
Use the command...
system-view
igmp-snooping
vlan-mapping vlan vlan-id
1-14
Remarks
—
—
Required
Simulated joining is disabled by
default.
Remarks
—
Required
By default, the VLAN tag in
IGMP general and
group-specific query messages
is not changed.