NEC IP8800/S2400 Series Troubleshooting Manual page 107

Table 3-16: Troubleshooting on Multicast Relay
No. Troubleshooting Steps and
Command
1 Use the show logging command to
check if any failure occurs.
2 Check if filtering and QoS are set
correctly.
3 Check the settings of IPv4 multicasts if
you want to use IPv4 multicast at the
same time.
[IP8800/S3600] [IP8800/S6700]
[IP8800/S6600] [IP8800/S6300]
3.
Check the following:
- Check the log information for physical failures.
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
Check the following:
• Check to see that the settings by configuration command
swrt_multicast_table 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
swrt_multicast_table has been executed, restart the system.
• When IPv4 multicast and IGMP snooping are used at the same time, configure IPv4
multicast in the VLAN. [IP8800/S3600]
When IPv4 multicast is used in the VLAN, "On" is indicated in "IPv4 Multicast
routing:" by entering the igmp-snooping command.
IPv4 Multicast routing: On
• When static group entry function of IPv4 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 IGMP snooping exceeds the
accommodation conditions, the excess multicast relay entries of IPv4 multicast can
communicate only between multicast router ports. Therefore, set up the network
configuration so as not to exceed the registered entries of IGMP snooping.
When the registered entries of IGMP snooping exceeds the accommodation
conditions, log information is displayed in the following:
IGMP snooping: The number of the IGMP snooping entry
exceeded the capacity of this system.
Troubleshooting Functional Failures in Operation
Action
Information."
after the configuration command
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