HP 6125G HP 6125G & 6125G/XG Blade Switches IP Multicast Configuration - Page 249
Solution, Appendix, Processing of IPv6 multicast protocol messages, IP Multicast Command Reference
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Solution 1. 2. 3. Use the display acl ipv6 command to check the configured IPv6 ACL rule. Make sure that the IPv6 ACL rule conforms to the IPv6 multicast group policy to be implemented. Use the display this command in MLD-snooping view or the corresponding interface view to verify that the correct IPv6 multicast group policy has been applied. If not, use the group-policy or mld-snooping group-policy command to apply the correct IPv6 multicast group policy. Use the display current-configuration command to verify that the function of dropping unknown IPv6 multicast data is enabled. If not, use the drop-unknown or mld-snooping drop-unknown command to enable the function of dropping unknown IPv6 multicast data. Appendix Processing of IPv6 multicast protocol messages With Layer 3 multicast routing enabled, an MLD snooping-enabled switch processes IPv6 multicast protocol messages differently under different conditions, as follows: 1. If only MLD is enabled on the switch, or if both MLD and IPv6 PIM are enabled on the switch, the switch does the following: { Maintains dynamic member ports or dynamic router ports according to MLD packets { Maintains dynamic router ports according to IPv6 PIM hello packets 2. If only IPv6 PIM is enabled on the switch, the following occurs: { The switch broadcasts MLD messages as unknown messages in the VLAN. { After receiving an IPv6 PIM hello message, the switch maintains the corresponding dynamic router port. 3. If MLD is disabled on the switch, one of the following occurs: { If IPv6 PIM is disabled, the switch deletes all its dynamic member ports and dynamic router ports. { If IPv6 PIM is enabled, the switch deletes only its dynamic member ports but not its dynamic router ports. NOTE: On a switch with Layer-3 IPv6 multicast routing enabled, use the display mld group port-info command to display Layer-2 port information. For more information about the display mld group port-info command, see IP Multicast Command Reference. 4. If IPv6 PIM is disabled on the switch, one of the following occurs: { If MLD is disabled, the switch deletes all its dynamic router ports. { If MLD is enabled, the switch maintains all its dynamic member ports and dynamic router ports. 238
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