Layers

The knowledge base is filed in seven layers, from the protocols on the wire up to the people who carry the pager.

Network Monitoring 4 articles

How monitoring works in practice: polling and checks, graphs and dashboards, logs, and what to watch on routers, switches and servers.

SNMP & Protocols 3 articles

The plumbing under monitoring: SNMP versions, MIBs, OIDs, counters and traps, plus syslog, ICMP, flow export and time sync.

Open-Source Tools 2 articles

Nagios, Zabbix, LibreNMS, Prometheus, Grafana, Cacti, RRDtool and the rest: what each is good at and how they fit together.

Home Lab 3 articles

Raspberry Pis, mini PCs, Proxmox, VLANs, UPS units and racks: building and watching a network at home.

Uptime & Alerting 5 articles

Alert design, on-call, SLAs and SLOs, uptime maths, incidents and runbooks.

IT Careers 1 article

From help desk to NOC to network engineer: skills, certifications, interviews and life on call.

Tech Notes 2 articles

Documentation, IPAM, diagrams, tooling habits and the odds and ends of running a network.