Comment 6 for bug 1767015

This case is not the same as described on bug #1766330. All NIC devices installed on SUT have failed the Multi-NIC iperf3 stress testing on 18.04 beta release. The test stopped and exited with messages “packet_write_wait: Connection to <ip_address_primary-network>: Broken pipe” on the 2nd iteration of iperf3 testing. At IPERF server, a message popped-out on screen “the client has terminated”.

Most system have at least 4 NICs devices installed. Two 1Gb/s Ethernet (eno1 and eno2) and two 10Gb/s either Ethernet or SFP (in this case ens2s0f0, and ens2s0f1). Due to different socket type, two IPERF subnets created - one for 1G/10G Ethernet NIC devices and the other one is for 10G SFP NIC devices. Below is the networked logical diagram of my current configuration.