[ops] Any experience with DELL M640 and BCM57840 network card ?

Hi Did someone try using DELL M640 with BCM57840 network card as compute nodes ? I am asking because we are adding a new compute node with such hw configuration to our OpenStack Ocata installation (with CentOS 7.6). Each tiime we create a VM on this compute node, the compute node crashes (bnx2x_panic_dump). Not clear which specific event triggers the problem. It doesn't seem a hw problem (e.g. iperf works without problems). We are using the same network card, but on different servers (e.g. on some M630 systems). If we disable the tx-checksum-ipv4 on the data network interface (i.e. "ethtool -K em3 tx-checksum-ipv4 off") we don't see anymore the problem. Thanks, Massimo