Hello David, experts, I see an issue with IGMP for IPv6 when I test HSR redundancy network interface. As soon as I set up an HSR interface, I see some IGMP messages (destination mac address: 33 33 00 00 00 02 going over HSR interface to slave interfaces, at the egress where as for IPv6, I see similar messages going directly over the Ethernet interfaces that are attached to HSR master. It appears that the NETDEV_CHANGEUPPER is not handled properly and the mcast snoop sends the packets over the old interfaces at timer expiry.
A dump of the message at the slave Ethernet interface looks like below. IPv4 [ 64.643842] 33 33 00 00 00 02 70 ff 76 1c 0f 8d 89 2f 10 3e fc [ 64.649910] 18 86 dd 60 00 00 00 00 10 3a ff fe 80 00 00 00 [ 64.655705] 00 00 00 72 ff 76 ff fe 1c 0f 8d ff 02 00 00 00 [ 64.661503] 00 00 00 00 00 00 00 00 00 00 02 85 00 8d dc You can see this is tagged with HSR. IPv6 [ 65.559130] 33 33 00 00 00 02 70 ff 76 1c 0f 8d 86 dd 60 00 00 [ 65.565205] 00 00 10 3a ff fe 80 00 00 00 00 00 00 72 ff 76 [ 65.571011] ff fe 1c 0f 8d ff 02 00 00 00 00 00 00 00 00 00 [ 65.576806] 00 00 00 00 02 85 00 8d dc 00 00 00 00 01 01 This is going directly to the slave Ethernet interface. When I put a WARN_ONCE, I found this is coming directly from mld_ifc_timer_expire() -> mld_sendpack() -> ip6_output() Do you think this is fixed in latest kernel at master? If so, could you point me to some commits. Thanks -- Murali Karicheri Linux Kernel, Keystone
