Introducing System Monitoring系統監控簡介

Imagine a busy smart city where traffic is constantly flowing through numerous intersections. To keep the traffic running smoothly, the city employs a team of traffic monitors who use cameras and sensors to observe and manage the flow of vehicles, quickly identifying and addressing any issues. Similarly, in a network, system monitoring tools act as these traffic monitors, providing a comprehensive overview of network performance and swiftly detecting any anomalies.

試想一座繁忙的智慧城市，車流不斷穿梭於眾多路口。為了讓交通順暢運行，該城市派出一組交通監控人員，運用攝影機與感測器觀察並管理車流，迅速找出並處理任何問題。同樣地，在網路中，系統監控工具就如同這些交通監控人員，提供網路效能的全面概觀，並迅速偵測任何異常情形。

System monitoring is essential for maintaining optimal network performance. It allows network engineers to gather real-time data, identify issues, and ensure that the network operates efficiently. This process involves creating a performance baseline, which serves as a reference point for troubleshooting and evaluating network health.

系統監控對維持最佳網路效能至關重要。它讓網路工程師能蒐集即時資料、找出問題，並確保網路有效率地運作。此過程包括建立效能基準，作為疑難排解與評估網路健康狀況的參考基準。

Enterprises need proactive network management to detect and address anomalies. A central Network Management System (NMS) is critical for this, using protocols such as Syslog and Simple Network Management Protocol (SNMP). These protocols enable network devices to report events to a central server, creating a holistic view of network activities. To ensure accurate event correlation, timestamps and synchronization across all network devices is crucial.

企業需要主動的網路管理來偵測並處理異常情形。中央網路管理系統（NMS）對此至關重要，它使用 Syslog 與簡單網路管理協定（SNMP）等協定。這些協定讓網路裝置能將事件回報給中央伺服器，藉此建立網路活動的整體視圖。為確保事件關聯的準確性，所有網路裝置之間的時間戳記與同步至關重要。

All routers, switches, and servers should be polled for metrics using SNMP and they can send information to an SNMP server for further analysis. All these devices must also send their logs to a syslog server and synchronize their time with the same source using the Network Time Protocol (NTP).

所有路由器、交換器與伺服器都應使用 SNMP 進行度量值輪詢，並可將資訊傳送至 SNMP 伺服器以做進一步分析。所有這些裝置也必須將其記錄傳送至 syslog 伺服器，並使用網路時間協定（NTP）與同一來源同步時間。