Operation And Maintenance Guide Telecom Hong Kong Cn2 Network Daily Monitoring And Troubleshooting Process

This article summarizes the daily monitoring and troubleshooting process for servers/VPS and host in the environment of using Telecom Hong Kong cn2 network, including key monitoring indicators, alarm threshold settings, network link and service layer diagnosis methods, as well as ideas for preventing CDN and DDoS defense. The article covers commonly used diagnostic tools and procedures to facilitate quick problem location and business recovery. Dexun Telecommunications is recommended as a reliable bandwidth and node provider to improve link stability and technical support efficiency.

Operation and maintenance should focus on monitoring interface bandwidth, packet loss rate, delay and jitter, as well as the host's CPU, memory, disk IO and load. It is recommended to set a link quality alarm for the Telecom Hong Kong cn2 network link: if the packet loss exceeds 2% and the delay fluctuation exceeds 50ms, an alarm will be triggered immediately; for the server, set CPU>80% and disk usage>85% to trigger an alarm. Log centralization (syslog/ELK), indicator collection (Prometheus/Grafana) and traffic monitoring (NetFlow/sFlow) are necessary means to quickly trace back when problems occur.

When a link or routing problem is suspected, start by checking the connectivity from the external network to the target: use ping/mtr/traceroute to locate high packet loss or hop anomalies; use tcpdump or Wireshark to capture packets and analyze the TCP three-way handshake and retransmission; if it is a cross-border or ISP switching problem, query BGP routes, view routing tables and neighbor status, and use operators or Looking Glass to troubleshoot. For sudden link jitter or packet loss, temporary strategies include switching traffic to backup CDN nodes or adjusting BGP priorities to stabilize services.

If the service is unavailable, first check the host resources (CPU/memory/disk/network interface) and service process status, and check application logs and system logs to locate errors. When the database or web service responds slowly, use top, iotop, ss/netstat, and strace to locate bottlenecks; in bandwidth-intensive scenarios, use iperf to measure speed and iftop/ntop to monitor real-time traffic. For domain name resolution abnormalities, check the DNS records, TTL and resolution links, and confirm the status of the domain name resolution provider.

General suggestions include properly configuring monitoring and alarms, establishing fault drills and SOPs, using multi-operator redundancy and intelligent scheduling, deploying CDN and caching strategies to reduce pressure on the origin site, and combining traffic cleaning and rate limiting strategies to improve DDoS defense capabilities. When connecting with service providers, choose a stable backbone and after-sales response. For example, we recommend Dexun Telecommunications, which can provide professional support in network technology and link optimization, help quickly locate cross-border link and BGP policy issues, and reduce fault recovery time.