Configuring Simulated Joining - 3Com S7906E Configuration Manual

An IPv6 static (S, G) join takes effect only if a valid IPv6 multicast source address is specified and
MLD snooping version 2 is currently running.
A static member port does not respond to queries from the MLD querier; when static (*, G) or (S, G)
joining is enabled or disabled on a port, the port does not send an unsolicited MLD report or an
MLD done message.
If MLD is enabled on the virtual interface of a VLAN, and you want a port in that VLAN to be a static
member port for an IPv6 multicast group or an IPv6 multicast source and group, in addition to
configuring the port as a static member port, you need to use the mld static-group command to
configure the VLAN interface to be a static member of the IPv6 multicast group or source and group.
For details of the mld static-group command, refer to MLD Commands in the IP Multicast Volume.
Static member ports and static router ports never age out. To remove such a port, you need to use
the corresponding undo command.

Configuring Simulated Joining

Generally, a host running MLD responds to MLD queries from the MLD querier. If a host fails to respond
due to some reasons, the multicast router will deem that no member of this IPv6 multicast group exists
on the network segment, and therefore will remove the corresponding forwarding path.
To avoid this situation from happening, you can enable simulated joining on a port of the switch, namely
configure the port as a simulated member host for an IPv6 multicast group. When an MLD query is
received, simulated host gives a response. Thus, the switch can continue receiving IPv6 multicast data.
A simulated host acts like a real host, as follows:
When a port is configured as a simulated member host, the switch sends an unsolicited MLD report
through that port.
After a port is configured as a simulated member host, the switch responds to MLD general queries
by sending MLD reports through that port.
When the simulated joining function is disabled on a port, the switch sends an MLD done message
through that port.
Follow these steps to configure simulated joining:
To do...
Enter system view
Enter Ethernet port/ONU
port/Layer 2 aggregate
interface view or port group
view
Configure simulated joining
Use the command...
system-view
interface interface-type
interface-number
port-group manual
port-group-name
mld-snooping host-join
ipv6-group-address [ source-ip
ipv6-source-address ] vlan
vlan-id
1-13
Remarks
—
Required
Use either approach
Required
Disabled by default