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3. Troubleshooting Functional Failures in Operation
48
Table 3-17: Troubleshooting on Multicast Relay
No. Troubleshooting Steps and
Command
Action
1Use the show logging command to
check if any failure occurs.
Check the log information for physical failures.
2 Check if filtering and QoS are set
correctly.
Certain packets may have been discarded by filtering, or packets may have been
discarded through bandwidth monitoring, discarding control, or shaper of the QoS
control. Check to see if the conditions of filtering and QoS control in the configuration
have been set up correctly and if bandwidth monitoring, discarding control, or shaper
has been set up appropriately for system operation.
For the procedure, see "3.23.1 Checking Filtering/QoS Setting Information."
3 Check the settings of IPv6 multicasts if
you want to use IPv6 multicast at the
same time.
[IP8800/S3600] [IP8800/S6700]
[IP8800/S6600] [IP8800/S6300]
Check the following:
• Check to see that the settings by configuration command are applied to the system
[IP8800/S3600]
When the settings by configuration command swrt_multicast_table are
applied, "On" is indicated on "Current selected swrt_multicast_table:" by entering
the show system command.
Current selected swrt_multicast_table: On
When "Off" is indicated after the configuration command
swrt_multicast_table has been executed, restart the system.
• When IPv6 multicast and MLD snooping are used at the same time, configure IPv4
multicast in the VLAN. [IP8800/S3600]
When IPv6 multicast is used in the VLAN, "On" is displayed in "IPv4 Multicast
routing:" by entering the igmp-snooping command.
IPv6 Multicast routing: On
• When static group entry function of IPv6 multicast is used in the VLAN, set
multicast router port to the ports that are necessary for multicast communication.
• When the number of entries registered in MLD snooping exceeds the
accommodation conditions, the excess multicast relay entries of IPv6 multicast can
communicate only between multicast router ports. Therefore, set up network
configuration so as not to exceed the registered entries of MLD snooping.
When the registered entries of MLD snooping exceeds the accommodation
conditions, log information is displayed in the following:
MLD snooping: The number of the MLD snooping entry
exceeded the capacity of this system.