Configuring Simulated Joining - H3C S3100 Series Operation Manual

To do...
Configure the port(s) as static
member port(s)
Configure the port(s) as static
router port(s)
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.
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 interface view
Configure simulated joining
Use the command...
mld-snooping static-group
ipv6-group-address [ source-ip
ipv6-source-address ] vlan vlan-id
mld-snooping static-router-port
vlan vlan-id
Use the command...
system-view
interface interface-type
interface-number
mld-snooping host-join
ipv6-group-address [ source-ip
ipv6-source-address ] vlan vlan-id
3-11
Remarks
Required
No static member ports by default
Required
No static router ports by default
Remarks
—
—
Required
Disabled by default