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Points to be noted
When MLD is not used and IPv6 multicast communication is executed, communication may not be
possible.
Port connected to the device where MLD snoop is enabled, is set as multicast router port by the
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configuration definition.
When multicast port is connected over 2 machines, set the multicast port by configuration definition.
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When multicast port is not recognized properly, the terminal which is connected to multicast router in the
beginning may not receive the multicast packet.
In this device, the group address which is registered once, does not delete the entry itself, even if the
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listener terminal does not exist, and deletes only the information of output port. When the un-required
group address is registered, it can be deleted with 'clear mldsnoop group' command.
When maximum number of multicast group address number that can be registered exceeds, flooding is
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done for excessive number in all the same VLANs.
Do not use the MLD snoop function when the group addresses being handled exceeds the maximum
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number that can be registered.
In the network that uses the communication of IPv4 multicast enable even the IGMP snoop.
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It cannot be used in the networks that use the communications other than IPv6 multicast. Do not enable
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the MLD snoop function.
In this device addresses in which the values of lower 32 bits of IPv6 address are same are recognized as
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same addresses. Therefore, packets of addresses of both the sides are transmitted even if different listener
terminals matching with these addresses exist.
Normally there is no need to set transmission source address of MLD snoop. Set only when a device exists
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wherein MLD packet that has source address as :: cannot be recognized. Further, when multiple MLD
snoop devices are connected, do not set more than 2 source addresses of MLD snoop in the same VLAN.
Do not disable the Querier function by the 'vlan mldsnoop querier' command in the network where
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multicast router is not connected.
MLD snoop function of VLAN ID which belongs to IEEE802.1Q tunnel port is disabled.
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