NEC IP8800/S3600, IP8800/S6600, IP8800/S2400, IP8800/S6700, IP8800/S6300 Using the show mld-snooping

3. Troubleshooting Functional Failures in Operation

No.	Troubleshooting Steps and		Action
	Command
4	Check the MLD snooping configuration	Check the following:
	using the show mld-snooping	- Check that the message below is displayed to confirm the existence of the MLD
	command.	querier which monitors group members.
		(1) If the MLD querier exists, the MLD querier IP address is displayed.
		MLD querying system: fe80::200:87ff:fe10:1959*
		(2) If the MLD querier does not exist, nothing is displayed in "MLD querying system:".
		MLD querying system:
		- If this system is the MLD querier, confirm that an IP address is set for the VLAN.
		(1) If an IP address is set for the VLAN, the following message is displayed.
		IP Address: fe80::200:87ff:fe10:1959*
		(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 mld-snooping 100
		Date 2005/05/15 15:20:00
		VLAN 100:
		IP Address:fe80::200:87ff:fe10:1959 Querier : enable
		MLD querying system: fe80::200:87ff:fe10:1959
		Port(2): 0/1,0/3
		Mrouter-port: 0/1
		Group Count :3
5	Execute the show mld-snooping	Check the following:
	command with "group" parameter	- Confirm that the joined IPv6 multicast group address is displayed by the show
	specified, and check IPv6 multicast	mld-snooping group command.
	group address.	> show mld-snooping group 100
		Date 2005/05/15 15:20:00
		VLAN 100 Group count:2
		Group Address	MAC Address
		ff0e::0e0a:0a01 3333.0e0a.0a01
		Port-list 0/1-3
		ff0e::0102:0c11 3333.0102.0c11
		Port-list	0/1-2

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

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