NEC IP8800/S2400, IP8800/S6600 manual Troubleshooting on Multicast Relay, Show system command

3. Troubleshooting Functional Failures in Operation

Table 3-16: Troubleshooting on Multicast Relay

No.	Troubleshooting Steps and	Action
	Command
1	Use the show logging command to	Check the following:
	check if any failure occurs.	- Check the log information for physical failures.
2	Check if filtering and QoS are set	Certain packets may have been discarded by filtering, or packets may have been
	correctly.	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 IPv4 multicasts if	Check the following:
	you want to use IPv4 multicast at the	• Check to see that the settings by configuration command
	same time.	swrt_multicast_table are applied to the system. [IP8800/S3600]
	[IP8800/S3600] [IP8800/S6700]
	[IP8800/S6600] [IP8800/S6300]	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 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-snoopingcommand.
		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.

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