Branimir Rajtar – Getting 1+ Tbps from an x86 Server
Branimir Rajtar is CTO and co-founder of 5×9 Networks, where he focuses on the design and development of software-based broadband networking platforms. He has worked on virtualized BNG solutions and network automation for more than a decade, with a particular interest in high-performance packet processing and scalable network architectures. Branimir is also active in the network operator community as chair of NOG.HR, the Croatian Network Operator Group, helping organize technical events and knowledge sharing among network engineers.
At BalticNOG 2026, Branimir will bring this work to the stage with his talk, “Getting 1+ Tbps from an x86 Server.”
From Multi-VM to a Single High-Performance Machine
Branimir’s talk describes the journey of pushing a virtualized Broadband Network Gateway (vBNG) past 1 Tbps of throughput on a single x86 server. He’ll walk through how the design evolved from early multi-VM setups into a single virtual machine capable of handling high packet rates, and the practical lessons learned along the way.
SR-IOV, DPDK, and Deep Hardware Tuning
The talk covers the role SR-IOV and Intel DPDK played in getting there, alongside extensive hardware tuning and code-level optimizations. Branimir will get into the major redesigns driven by CPU cache behavior and PCIe bottlenecks, the kind of low-level engineering work that decides whether a design actually hits its throughput target or falls short.
What Systematic Optimization Actually Buys You
Branimir will share real-world performance results showing how systematic optimization, modern hardware, and iterative engineering combined to unlock throughput gains most people wouldn’t expect from commodity servers.
Why You Shouldn’t Miss This Talk
If you’ve ever wondered how far commodity x86 hardware can actually be pushed for high-throughput networking, this talk gives you a real answer, backed by the specific engineering decisions that got there. Branimir brings both the architecture and the hard-won lessons from getting it wrong before getting it right.
Whether you work on vBNG deployments, packet processing, or just want to see what’s possible on a single server, this talk gives you a concrete look at the engineering behind the numbers.
đź“… When: 23-24 September 2026
đź“Ť Where: BalticNOG 2026, Riga, Latvia
đź”— Don’t miss BalticNOG! Register today: https://balticnog.org/tickets/
