https://www.pistack.xyz/tags/docsis/ Recent content in Docsis on Pi Stack Hugo en-us Wed, 17 Jun 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-06-17-self-hosted-docsis-modem-monitoring-isp-performance-snmp/ Wed, 17 Jun 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-06-17-self-hosted-docsis-modem-monitoring-isp-performance-snmp/ <h2 id="introduction">Introduction</h2> <p>Cable internet subscribers often have no visibility into their modem&rsquo;s health beyond &ldquo;the internet works&rdquo; or &ldquo;the internet doesn&rsquo;t work.&rdquo; But DOCSIS modems expose rich diagnostic data via SNMP — signal-to-noise ratios, power levels, uncorrectable codewords, and channel bonding status. With self-hosted monitoring tools, you can track this data over time, correlate modem health with internet performance, and even generate evidence for ISP support tickets. This guide compares three approaches to self-hosted DOCSIS modem monitoring: <strong>Prometheus SNMP Exporter</strong>, <strong>Telegraf with SNMP input</strong>, and <strong>custom Python SNMP collectors</strong>.</p>