Configuring MLD Snooping Port Functions 587
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■ The IPv6 static (S, G) joining function is available only if a valid IPv6 multicast
source address is specified and MLD Snooping version 2 is currently running on
the switch.
■ 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 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 heard, 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:
Enter the
corresponding view
Enter Ethernet port view interface
interface-type
interface-number
Use either command
Enter port group view port-group { manual
port-group-name |
aggregation agg-id }
Configure the port(s) as static member port(s) mld-snooping
static-group
ipv6-group-address
[ source-ip
ipv6-source-address ]
vlan vlan-id
Required
Disabled by default
Configure the port(s) as static router port(s) mld-snooping
static-router-port
vlan vlan-id
Required
Disabled by default
To do… Use the command… Remarks
To do… Use the command… Remarks
Enter system view system-view -
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