Core Monitoring
Everything about monitoring configuration. Read how you can monitor various aspects of the network hardware and software.
In this chapter
- Monitoring ConceptsReview basic concepts like Monitoring Engines, Node State Monitoring, and how to disable monitoring.
- Monitoring of Network NodesRead about node state evaluation and node monitoring settings.
- Network Services MonitoringAvailability and performance monitoring of 70 network services such as FTP, HTTP, SMTP, etc.
- Network Traffic MonitoringNetCrunch supports many flow protocols as application monitoring using Cisco NBAR.
- Monitoring SNMP DevicesNetCrunch provides complete SNMP monitoring, including support for v3, traps, and MIB compiler.
- Custom SNMP ViewsCreate custom SNMP forms and tables that make SNMP device data readable, editable, and easier to interpret.
- Cisco IP SLA operationsNetCrunch supports Cisco IP SLA technology.
- Essential SensorsDNS Query, System Uptime, RADIUS, SSL Certificate & SSH Remote Ping.
- Composite StatusCombine the state of several monitored objects into a single status, using critical, redundant or influential groups - and nest those statuses to describe a whole service.
- Monitoring PrintersNetCrunch delivers sophisticated printer monitoring capabilities by utilizing SNMP protocols, facilitating detailed tracking and management of printer performance.
- IPMI MonitoringIntelligent Platform Management Interface (IPMI) is a set of computer interface specifications for an autonomous computer subsystem that provides management and monitoring capabilities independently of the host system's CPU, firmware (BIOS or UEFI) and operating system.
- Dell EMC SensorMonitors the health and power consumption of Dell EMC storage through the Unisphere Management REST API, including file systems, LUNs and storage pools.
- ICMP Jitter SensorThe sensor sends a series of ICMP packets and calculates Jitter based on RTT.
- Traceroute SensorThe sensor can alert when the number of hops to the destination has changed
- Monitoring of Network InterfacesNetCrunch provides detailed monitoring of network interfaces for SNMP-enabled devices, combining flexible policy-based selection, full duplex-aware metrics, real-time delta calculations for errors and discards, VLAN and MAC mapping, CDP/LLDP-based topology view, and a best-in-class interface visualization and alerting system.
- Monitoring External SourcesHow NetCrunch monitors data originating outside built-in collectors using telemetry, scripts, files, and external APIs.
- NetCrunch Native Data FormatsNative payload formats used by NetCrunch to ingest external monitoring data as counters, statuses, and contextual data objects using JSON, XML, and CSV.
- Data File SensorThe sensor allows getting data from various sources and processes them to get metrics and status values.
- Custom Data ParsersData Parsers transform and analyze external data, returning NetCrunch counter metrics and status objects.
- Text Parsers (Text Parsing Expressions)Text Parsers extract named variables from incoming text logs and text messages so they can be filtered, correlated, and evaluated in alerting rules.
- Telemetry in NetCrunchTelemetry enables systems to push metrics and logs into NetCrunch without polling. This topic explains when to use telemetry and how NetCrunch supports it via Telemetry Nodes and the OTLP cloud gateway.
- Telemetry NodeA Telemetry Node is a NetCrunch node type for receiving metrics, statuses, and events from external systems via REST or OTLP. It anchors telemetry data for cloud, IoT, or custom systems, and replaces the older REST Receiver with a unified, event-capable design.
- Hardware Health Sensor (SNMP)Monitors physical hardware sensors via SNMP, including temperature, fan speeds, power supply status, and voltage levels. Enables proactive detection of hardware issues and supports long-term tracking of system health trends.
- Monitoring SNI SSL CertificatesThis topic explains how to monitor multiple SSL certificates on a single IP address (SNI) by treating each domain as a separate Node in NetCrunch, and how to accurately aggregate their status using a Composite Status Node.