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  • Do you have GRO and NAT-t on?

    There is a known issue with 19.0.MR1 with that combination when ipsec acceleration is on (it is fixed in 19.0.MR2).

    If that is indeed the case, as a workaround, you can disable GRO (and have things work with ipsec acceleration on as well)
    Disable it on the parent netdev (oct0` on 1US/1UL/2Ua devices and `oct0, oct1` on 2Ub)
    ethtool -K oct0 gro off
    and then disable on the relevant physical port:

    ethtool -K PortXYZ gro off (replace PortXYZ with whatever port is applicable)