TCP connections between virtual machines across hosts fail to establish, with packets being discarded after entering the VM due to failed checksum validation. The virtual machines are using the physical NIC’s checksum offload feature. Disabling checksum offload on the host via ethtool -K ethx tx off allows TCP connectivity, but results in a severe drop in small packet throughput (pps). A Broadcom driver for openEuler that supports enabling checksum offload is required.
Environment Information:
NIC Vendor + Model (Chip Model): Broadcom P210tep NetXtreme-E Dual-port 10GBASE-T Ethernet PCIe Adapter
NIC Driver Version: bnxt_en 5.10.0-182.0.0.95.r3008_242_331
NIC Firmware Version: 233.1.135.7