NEC IP8800/S2400 Series Troubleshooting Manual page 108

3.
Troubleshooting Functional Failures in Operation
No. Troubleshooting Steps and
Command
4 Check the IGMP snooping configuration
using the show igmp-snooping
command.
5 Execute the show igmp-snooping
command with "group" parameter
specified, and check IPv4 multicast
group address.
* 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."
46
Check the following:
- Check that the message below is displayed to confirm the existence of the IGMP
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:
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
Check the following:
- Confirm that the joined IPv4 multicast group address is displayed by the show
igmp-snooping group command.
> show igmp-snooping group 100
Date 2005/05/15 15:20:00
VLAN 100 Group counts:3
Group Address
224.10.10.10
Port-list
225.10.10.10
Port-list
239.192.1.1
Port-list
Action
*
*
Querier : enable
MAC Address
0100.5e0a.0a0a
0/1-3
0100.5e0a.0a0a
0/1-2
0100.5e40.1606
0/1