[dpdk-users] mlx5 PMD fails to receive certain icmpv6 multicast

[Thomas Monjalon]

06/03/2020 01:45, Liwu Liu:
> Hi Team,
> 
> I am using the mlx5/100G in KVM guest. The host shows this PCI vfNIC is provisioned to the guest:
>       "17:01.1 Ethernet controller: Mellanox Technologies MT27800 Family [ConnectX-5 Virtual Function]"
> 
> I am using DPDK 19.11 with kind of standard configurations, and when DPDK application runs I still have the kernel mlx5e net device present. I have both promiscuous and all-multicast turned on.
> 
> It works fine for IPV4, but for IPV6 it fails. It can receive packets destined to 33:33:00:00:00:02 (IPV6 Router solicitation), but cannot receive packets destined to 33:33:ff:00:00:01 (IPV6 neighbor solicitation for some address).
> 
> But if I avoid DPDK, directly use the OFED-4.6 based kernel driver, everything works fine as expected.
> 
> I am thinking there is some mismatch happened for MLX5 PMD. Please give some advice/hints.

Adding Mellanox engineers in Cc list for help.