Hi, My setup: Qemu+KVM Host OS: CentOS, Linux kernel version 2.6.32 Guest OS: Linux kernel version 3.10.0, with a DPDK application running. Physical NIC: Intel I350 T4 using igb driver On guest VM: 2 (out of 4) ports of the I350 are virtualized using PCI-passthrough (no VFs, SR-IOV is not enabled in the NIC eeprom)
2 other (non-DPDK) VMs are connected through the DPDK VM as follows: VM1---DPDK VM---VM2 On doing a ping from VM1 to VM2 (or the other way), on the DPDK VM, the packet is received on 1 port and sent out of the other but doesn't reach VM2. I turned on CONFIG_RTE_LIBRTE_E1000_DEBUG_RX and CONFIG_RTE_LIBRTE_E1000_DEBUG_TX but couldn't figure out where the transmitted packet went. How can I debug this issue? For comparison, the same setup works if the guest VM uses emulated e1000 NICs. I want to use igb/PCI-passthrough to be able to use multiple RX queues. Please let me know if any other information is required. Thanks, Anant
