summary report on measured packet loss and jitter performance of cheap japanese cn2 during peak traffic periods

this report is based on the systematic measurement of cheap japanese cn2 lines during multi-day traffic peak hours, focusing on two key performance indicators: packet loss rate and jitter. it aims to provide reference data and conclusions for network evaluation, line selection and operation and maintenance optimization. data collection and analysis follow a repeatable methodology.

"cheap japanese cn2" was selected as the research object because it is attractive in terms of cost and accessibility. the main purpose of this test is to evaluate the stability of packet loss and jitter during real peak hours to determine the availability and risks of this type of line in actual services (such as voip, video conferencing, games).

the test uses an active measurement topology initiated from multiple points to multiple exits in japan, including different asns and different physical paths. sampling covers the evening and early morning peak hours of consecutive working days, and samples are taken every minute to capture short-term jitter and sudden packet loss events to ensure sufficient sample size.

use icmp/tcp baseline delay, iperf3 throughput, ping interval and rtt jitter statistics, and minute-level packet loss rate as measurement indicators. the tool chain is mainly based on open source measurement tools, and window statistics and outlier elimination are performed on the results to ensure data reliability.

actual measurements show that during most peak hours, the overall packet loss rate remains low and fluctuates for short periods of time, but there are some local sudden increases. bursts are usually related to link congestion or queue overflow at intermediate nodes, lasting from tens of seconds to several minutes, and have potential impact on real-time services.

the jitter performance shows periodic fluctuation characteristics, and the short-term jitter value increases significantly during peak periods, especially during link switching or congestion relief. the jitter peak value is higher. for latency-sensitive applications, jitter peaks are a better indicator of experience risk than averages.

there are obvious differences in performance between different exits and time periods: some paths remain stable during the same peak hours, while other paths suffer from frequent jitters and short-term packet loss. the sources of differences include multiple factors such as upstream backbone link load, routing strategy, and interconnection point quality.

comprehensive packet loss and jitter data shows that japan's cheap cn2 can meet general internet services under non-extreme peaks, but there are occasional risks for real-time interactive services. it is recommended to carry out redundant design or qos strategy when deploying voice, video or online games to reduce experience fluctuations.

in response to the observed problems, it is recommended to adopt multi-exit backup, traffic balancing and application layer retry strategies, and to cooperate with upstream providers to optimize routing and congestion control. regular proactive measurements and alerts can help quickly locate and mitigate short-term packet loss/jitter events.

the actual measurement of cheap japanese cn2 shows that it is generally available during most peak hours, but there are short-term packet loss and jitter peaks that pose risks to real-time services. it is recommended to conduct redundancy, qos and continuous monitoring based on business importance, and pay attention to specific exits and time period performance when selecting lines to reduce operational risks.