Home > Communication Service Provider Solutions > Telecom Multicloud Foundation > Red Hat > Guides > Red Hat Open Stack Platform Guides > Jumbo frames Performance Analysis Over Red Hat OpenStack 16.1 Infrastructure > Problem statement
The network throughput testing measured in Red Hat OpenStack Platform (RHOSP) 16.1 revealed consistent packet drop for jumbo frames across DPDK physical NICs. Packet drops were observed ranging 5K - 38K for different jumbo frames sizes that is, 4096, 8192 and 9000 bytes[3]. The occurrence of packet drops limited the ZPL to converge at 99.2% line rate. The network performance testing was carried out on RHOSP 16.1 with OVS-DPDK[4] feature enabled, providing fast packet processing capability for network intensive workloads. Synthetic network load was generated using Spirent’s proprietary network testing tool, Spirent MethodologyCenter. Unidirectional traffic was sent from the provisioned VM on one compute node as traffic generator to the traffic receiver VM on another node. Refer to Appendix A for hardware and software details. The Figure 1 depicts the scenario mentioned above and the marked red cross indicates packet drop observed during testing.
Figure 1. Test environment highlighted with the packet drop area
Various methods were employed to eliminate the packet drops. Different parameters were incrementally tweaked to help eliminate the packet drop with enhanced network throughput. This guide highlights the best practices to consider for better throughput targeting for jumbo frames use-cases.