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3. Troubleshooting Functional Failures in Operation
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3.5.4 Multicast Relay by IGMP snooping Is Disabled
If multicast relay is disabled when using IGMP snooping, follow the analysis flow to identify the symptom using steps
shown in the table below and isolate the problem.
Figure 3-5: Analysis Flow
Analysis Flow
Is there log information?
Is filter setting correct?
Is there IGMP querier?
see the manual "Message Log
Reference" and perform the
actions 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 IGMP snooping.
Is the device that relays
multicast data connected
Unresolved
Set the connecting port as
a multicast router port.
Unresolve
to the same
VLAN?
Verify that the configuration of
IGMP snooping is properly set in
the corresponding VLAN.
Is it a relay within
the same VLAN?
Refer to "3.8 IPv4 Multicast
Routing Communication
Failure."
Verify that other systems
are set to relay the
multicast data.
Is the data relayed within
the same VLAN?
Is IPv4 multicast used?
Verify that the settings for
using IPv4 multicast at the
same time are correct.
This system may be the
IGMP querier.
Y
Y
N
N
Y
N
N
Y
N
N
N
Y
Y
Y