NEC IP8800/S6700 manual If a multicast router is connected, check mrouter-port, Group address

3.Troubleshooting Functional Failures in Operation

No.	Troubleshooting Steps and		Action
	Command
4	Check the IGMP snooping configuration	Check the following:
	using the show igmp-snooping	- Check that the message below is displayed to confirm the existence of the IGMP
	command.	querier which monitors group members. [IP8800/S3600]
		(1) If the IGMP querier exists, the IGMP querier IP address is displayed.
		IGMP querying system: 192.168.11.20*
		(2) If the IGMP querier does not exist, nothing is displayed in "IGMP querying
		system:".
		IGMP querying system:
		- If this system is the IGMP querier, confirm that an IP address is set for the VLAN.
		(1) If an IP address is set for the VLAN, a message is displayed.
		IP Address: 192.168.11.20*
		(2) If no IP address is set for the VLAN, nothing is displayed in "IP Address:".
		IP Address:
		- If a multicast router is connected, check mrouter-port.
		> show igmp-snooping 100
		Date 2005/05/15 15:20:00
		VLAN 100:		Querier : enable
		IP Address:192.168.11.20
		IGMP querying system : 192.168.11.20
		Port (2): 0/1,0/3
		Mrouter-port:0/1
		Group Counts: 3
5	Execute the show igmp-snooping	Check the following:
	command with "group" parameter	- Confirm that the joined IPv4 multicast group address is displayed by the show
	specified, and check IPv4 multicast	igmp-snooping group command.
	group address.	> show igmp-snooping group 100
		Date 2005/05/15 15:20:00
		VLAN 100 Group counts:3
		Group Address	MAC Address
		224.10.10.10	0100.5e0a.0a0a
		Port-list 0/1-3
		225.10.10.10	0100.5e0a.0a0a
		Port-list 0/1-2
		239.192.1.1	0100.5e40.1606
		Port-list	0/1

*If this system is the IGMP querier, the address displayed in "IGMP querying system" matches the address displayed in "IP Address"; however, if a different system is the IGMP querier, the address displayed in "IGMP querying system" does not match the address displayed in "IP Address."

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