H3C Technologies H3C S3100V2 Series Switches - Manual (Page 76)

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NOTE:
•
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 that is running MLD responds to MLD queries from the MLD querier. If a host fails to
respond, the multicast router will deem that no member of this IPv6 multicast group exists on the network
segment, and will remove the corresponding forwarding path.
To avoid this situation, enable simulated joining on a port of the switch. Namely, you can configure the
port as a simulated member host for an IPv6 multicast group. When an MLD query is received, the
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... Use the command... Remarks
Enter system view system-view —
interface interface-type
interface-number
Enter Ethernet interface/Layer 2
aggregate interface view or port
group view
port-group manual
port-group-name
Required
Use either approach
Configure simulated joining
mld-snooping host-join
ipv6-group-address [ source-ip
ipv6-source-address ] vlan vlan-id
Required
Disabled by default
NOTE:
•
Each simulated host is equivalent to an independent host. For example, when receiving an MLD query,
the simulated host corresponding to each configuration responds respectively.
• Unlike a static member port, a port configured as a simulated member host will age out like a dynamic
member port.