The plumbing under monitoring: SNMP versions, MIBs, OIDs, counters and traps, plus syslog, ICMP, flow export and time sync.
Network Monitoring, SNMP & Protocols
One rsyslog server, one folder per device, logs you can grep at 2 a.m. Formats, severities, device settings, rotation and clocks for a small network.
Continue reading Syslog for small networks: collect, rotate and actually read your logs ›
SNMP & Protocols, Network Monitoring
What ifHCInOctets, ifInErrors and ifOutDiscards really count, how a rate is computed, and the worked math behind a graph that lies after a wrap.
Continue reading Interface counters explained: octets, errors, discards and the 32-bit wrap ›
Community strings, USM users, GETBULK and 64-bit counters: what each SNMP version changed, and when v2c is still a fair choice.
Continue reading SNMP v1, v2c and v3: what changed and which one to run ›
