https://www.pistack.xyz/tags/traffic-control/ Recent content in Traffic-Control on Pi Stack Hugo en-us Mon, 01 Jun 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-06-01-linux-tc-filter-classifiers-u32-flower-bpf-guide/ Mon, 01 Jun 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-06-01-linux-tc-filter-classifiers-u32-flower-bpf-guide/ <h2 id="introduction">Introduction</h2> <p>Linux traffic control (<code>tc</code>) is the kernel&rsquo;s Swiss Army knife for packet scheduling, shaping, and classification. At its core, <code>tc</code> uses classifiers (filters) attached to queuing disciplines (qdiscs) to match packets and direct them to the correct queue. Choosing the right classifier determines both the accuracy of your traffic shaping and the CPU cost per packet.</p>