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Set IP address on VLAN, and add the querier function in IGMP snooping. Unresolve Is IPv4 multicast used? Verify that the settings for using IPv4 multicast at the same time are correct. This system may be the IGMP querier. Y Y N N Y N N Y Is the device that relays multicast data connected Unresolved Set the connecting port as a multicast router port. to the same VLAN? Verify that the configuration of IGMP snooping is properly set in the corresponding VLAN. Is it a relay within the same VLAN? Refer to "3.8 IPv4 Multicast Routing Communication Failure." Verify that other systems are set to relay the multicast data. Is the data relayed withinthe same VLAN? N N N Y Y Y 3. Troubleshooting Functional Failures in Operation Table 3-16: Troubleshooting on Multicast Relay No. Troubleshooting Steps and Command Action 1 Use the show logging command to check if any failure occurs. Check the following: - Check the log information for physical failures. 2 Check if filtering and QoS are set correctly. Certain packets may have been discarded by filtering, or packets may have been discarded through bandwidth monitoring, discarding control, or shaper of the QoS control. Check to see if the conditions of filtering and QoS control in the configuration have been set up correctly and if bandwidth monitoring, discarding control, or shaper has been set up appropriately for system operation. For the procedure, see "3.23.1 Checking Filtering/QoS Setting Information." 3 Check the settings of IPv4 multicasts if you want to use IPv4 multicast at the same time. [IP8800/S3600] [IP8800/S6700] [IP8800/S6600] [IP8800/S6300] Check the following: • Check to see that the settings by configuration command swrt_multicast_table are applied to the system. [IP8800/S3600] When the settings by configuration command swrt_multicast_table are applied, "On" is indicated on "Current selected swrt_multicast_table:" by entering the show system command. Current selected swrt_multicast_table: On When "Off" is indicated after the configuration command swrt_multicast_table has been executed, restart the system. • When IPv4 multicast and IGMP snooping are used at the same time, configure IPv4 multicast in the VLAN. [IP8800/S3600] When IPv4 multicast is used in the VLAN, "On" is indicated in "IPv4 Multicast routing:" by entering the igmp-snoopingcommand. IPv4 Multicast routing: On • When static group entry function of IPv4 multicast is used in the VLAN, set multicast router port to the ports that are necessary for multicast communication. • When the number of entries registered in IGMP snooping exceeds the accommodation conditions, the excess multicast relay entries of IPv4 multicast can communicate only between multicast router ports. Therefore, set up the network configuration so as not to exceed the registered entries of IGMP snooping. When the registered entries of IGMP snooping exceeds the accommodation conditions, log information is displayed in the following: IGMP snooping: The number of the IGMP snooping entry exceeded the capacity of this system. 3. Troubleshooting Functional Failures in Operation No. Troubleshooting Steps and Command Action 4 Check the IGMP snooping configuration using the show igmp-snoopingcommand. 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 15:20:00VLAN 100: IP Address:192.168.11.20 Querier : enable IGMP querying system : 192.168.11.20 Port (2): 0/1,0/3 Mrouter-port:0/1Group Counts: 3 5 Execute the show igmp-snooping command with "group" parameter specified, and check IPv4 multicast group address. 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 15:20:00VLAN 100 Group counts:3Group Address MAC Address 224.10.10.10 0100.5e0a.0a0a Port-list 0/1-3225.10.10.10 0100.5e0a.0a0a Port-list 0/1-2239.192.1.1 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." 3. Troubleshooting Functional Failures in Operation 3.5.5 Multicast Relay by MLD snooping Is Disabled If multicast r...

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