NEC ip8800-s6700 User Manual

3.   

Troubleshooting Functional Failures in Operation

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* 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."

4

Check the MLD snooping configuration 
using the show mld-snooping 
command.

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 

5

Execute the show mld-snooping 
command with "group" parameter 
specified, and check IPv6 multicast 
group address.

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    MAC Address

       ff0e::0e0a:0a01 3333.0e0a.0a01

           Port-list  0/1-3

       ff0e::0102:0c11 3333.0102.0c11

           Port-list  0/1-2

No.

Troubleshooting Steps and

Command

Action