Using openvswitch-2.5.0, user-space mode with Linux 2.6 based kernels.IGMP packets from NIC driver are handed over to Linux stack using netif_rx(). openvswitch is picking packets from net_device using netlink. As this path bypasses Linux kernel's IP stack, Linux kernel isn't validating IP checksum. Looks like, when packet enters vswitchd, it doesn't seem to validate IP header checksum for the IGMP packets and is directly delivering them to mcast-snoop module. Is this a deliberate one to skip validating IP header checksum for IGMP packets in this scenario or I am missing something here. -Thanks
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