Is there any utility like tcpdump on Linux to capture traffic going through the RDMA channel? (Infiniband / ROCE / iWARP)
Old thread, but still:
As Roland noted, sniffing RDMA traffic is difficult, because once the endpoints have completed the initial handshake, the traffic passes through the network interface card (HCA) directly to memory. The only way to sniff this traffic without entering a dedicated HW sniffer on the wire is to have bindings to specific providers in the network card and the SW tool that uses these hooks.
Mellanox HCAs, "ibdump" . Mellanox OFED.
HW , - RDMA, .
, . RDMA , , . . , sniffer , .
, Ethernet, iWARP IBoE (aka RoCE), (, Linux), tcpdump wirehark RDMA, . Wireshark iWARP IBoE.
InfiniBand ( ), , , , .
Chelsio T4 , / NIC . tcpdump - e RDMA TOE.
Wireshark . , . , ROCE .