NEC IP8800/S2400 Series Troubleshooting Manual page 111

No. Troubleshooting Steps and
Command
4 Check the MLD snooping configuration
using the show mld-snooping
command.
5 Execute the show mld-snooping
command with "group" parameter
specified, and check IPv6 multicast
group address.
* 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."
3.
Check the following:
- Check that the message below is displayed to confirm the existence of the MLD
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
Check the following:
- Confirm that the joined IPv6 multicast group address is displayed by the show
mld-snooping group command.
> show mld-snooping group 100
Date 2005/05/15 15:20:00
VLAN 100 Group count:2
Group Address
ff0e::0e0a:0a01 3333.0e0a.0a01
Port-list
ff0e::0102:0c11 3333.0102.0c11
Port-list
Troubleshooting Functional Failures in Operation
Action
MAC Address
0/1-3
0/1-2
49