H3C Technologies H3C S7500E Series Switches - Manual (Page 270)

9-14
To do... Use the command... Remarks
Configure the port(s) as static
router port(s)
mld-snooping
static-router-port vlan vlan-id
Required
No static router ports by default
z 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.
z 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.
z 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 Configuration Commands in the IP Multicast Command Reference.
z 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:
z When a port is configured as a simulated member host, the switch sends an unsolicited
MLD report through that port.
z After a port is configured as a simulated member host, the switch responds to MLD general
queries by sending MLD reports through that port.
z When the simulated joining function is disabled on a port, the switch sends an MLD done
message through that port.