Network Monitoring 归档 - 夜莺博客

标签：Network Monitoring

snmpwalk and snmpget: MIB and OID Troubleshooting

snmpwalk and snmpget: MIB and OID Troubleshooting

Fix snmpwalk and snmpget errors: Unknown Object Identifier, missing scalar index, MIB loading, timeouts and SNMPv3 access problems.

admin admin 2026-10-09
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Cacti Setup: Templates, Polling and Adding Devices at Scale

Cacti Setup: Templates, Polling and Adding Devices at Scale

Install and configure Cacti for network graphing: device and graph templates, SNMP credentials, data queries and CLI device onboarding.

admin admin 2026-10-04
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Observium Network Monitoring: Install, Poll and Add Devices

Observium Network Monitoring: Install, Poll and Add Devices

Install Observium on Ubuntu/Debian, add SNMP devices with add_device.php, understand MIB paths and verify polling with snmpwalk output.

admin admin 2026-10-04
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SPAN, RSPAN and ERSPAN: Port Mirroring Configuration

SPAN, RSPAN and ERSPAN: Port Mirroring Configuration

Configure Cisco port mirroring: local SPAN, RSPAN using a remote-span VLAN over trunks, and ERSPAN GRE sessions, with verification and MTU gotchas.

admin admin 2026-10-03
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NetFlow Collection with nfcapd, nfdump and NfSen

NetFlow Collection with nfcapd, nfdump and NfSen

Build a self-hosted NetFlow/IPFIX collector with nfcapd and nfdump: install, capture, query flows by filter, expire old data and graph with NfSen.

admin admin 2026-09-29
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Zabbix Proxy: Distributed Monitoring and Active Mode

Zabbix Proxy: Distributed Monitoring and Active Mode

Deploy a Zabbix proxy for distributed monitoring: active versus passive mode, ProxyOfflineBuffer, proxy groups for HA and the frontend registration st

admin admin 2026-09-28
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blackbox_exporter: ICMP, TCP and HTTP Probes in Prometheus

blackbox_exporter: ICMP, TCP and HTTP Probes in Prometheus

Probe endpoints with Prometheus blackbox_exporter: module definitions for ICMP, TCP, DNS and HTTP, relabeling for multi-target scraping and the ICMP p

admin admin 2026-09-28
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LibreNMS Deployment for Network Monitoring

LibreNMS Deployment for Network Monitoring

Install LibreNMS, discover switches and routers, tune polling and alerting, and scale the poller pool for thousands of interfaces without missed data.

admin admin 2026-09-26
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Nagios Core NRPE Remote Host Monitoring Setup

Nagios Core NRPE Remote Host Monitoring Setup

Monitor Linux hosts with Nagios Core and NRPE: plugin install, nrpe.cfg access control, host and service objects, config validation and noisy-check tu

admin admin 2026-09-22
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Cisco IOS Logging and Syslog Config: Levels, Buffer and Traps

Cisco IOS Logging and Syslog Config: Levels, Buffer and Traps

Cisco IOS ships with logging that is actively unhelpful: a chatty console, a tiny buffer and no history after a reload.

admin admin 2026-09-10
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