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3. Troubleshooting Functional Failures in Operation
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3.5.5 Multicast Relay by MLD snooping Is Disabled
If multicast relay is disabled when using MLD snooping, follow the analysis flow to identify the symptom using steps
shown in the table below and isolate the problem.
Figure 3-6: Analysis Flow
Analysis Flow
Is there log information?
Is filter setting correct?
Is there MLD querier?
Is the device that relays
multicast data connected
to the same
VLAN?
Is it a relay within
the same VLAN?
Verify that the MLD snooping
configuration is properly set up in
the corresponding VLAN.
Refer to "3.11 IPv6 Multicast
Routing Communication
Failure."
Verify that other devices
are set to relay the
multicast data.
See the manual "Message Log
Reference" and perform the
action described in [Action]
associated with each log
message.
Verify that the settings of
filter and QoS Control are
correct.
Set IP address on VLAN,
and add the querier
function in MLD snooping.
Set the connecting port as
a multicast router port.
Is the data relayed
within the same
VLAN?
Is IPv6 multicast used?
Verify that the settings for
using IPv6 multicast at the
same time are correct.
Unresolved
Unresolved
Y
Y
Y
Y
Y
Y
N
N
Y
N
N
N
N
N
This system may be the
MLD querier.