Hi,
ibdump is not working with 100G Mellanox card. I am using RHEL 7.0 kernel 4.7.
[root@localhost ~]# ibdump
Initiating resources ...
searching for IB devices in host
Port active_mtu=1024
MR was registered with addr=0x1219010, lkey=0x4ce0, rkey=0x4ce0, flags=0x1
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Device : "mlx5_0"
Physical port : 1
Link layer : Ethernet
Dump file : sniffer.pcap
Sniffer WQEs (max burst size) : 4096
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Failed to set port sniffer1: command interface bad param