Mexico is located in the southwest of North America, and its geographical location is far away from the mainland. Therefore, when the Mexican cloud server accesses the Chinese mainland, the network data will be transferred through multiple intercontinental nodes, which directly leads to high access delay. In actual tests, the average delay of accessing the Mexican cloud server from major cities in mainland China, such as Beijing, Shanghai, and Guangzhou, is between 240 milliseconds and 350 milliseconds, which fluctuates depending on the link status of the operator and the location of the server room.
Access delay is mainly determined by factors such as physical distance, link quality, cross-border routing strategy, and transit node congestion. Taking China Telecom as an example, most of its international access paths go through Hong Kong, Singapore, Los Angeles, and other places and then turn to Latin America. Mexico is not a core country for network transit in the Asia-Pacific region, and lacks direct optical cable interconnection lines, so data packets need to be forwarded in multiple hops. This multi-hop path will increase the RTT (Round Trip Time), making the response speed of accessing Mexico from the Chinese mainland significantly slower than that of Asian countries.
When accessing the Mexican cloud server from the China Mobile network, the common routing path is: mainland exit-Hong Kong-US West Coast-Central America-Mexico. Since China Mobile uses the CMI international backbone network, some lines are more congested during peak hours in the morning and evening compared to other operators, and the delay may be as high as 350 milliseconds or even close to 400 milliseconds. China Unicom mostly exports via Hong Kong or Japan, with an average delay of about 270 milliseconds, which is relatively more stable, but still cannot meet the application requirements with strict requirements for low latency.
In terms of line type, most Mexican cloud service providers use local access nodes to connect with US Tier 1 operators, and exports are mainly concentrated in Texas or California. International links rely on the US backbone network, and the insufficient layout of local backbone networks in Latin America leads to high reverse access delays from Mexico to China. Central America has not yet built a high-speed link directly connected to mainland China, and almost all cross-border communications rely on forwarding from the United States or South America, which is also an important factor causing high latency.
Nevertheless, if the Mexican cloud server is mainly used to deploy global content or support local services for Latin America, and mainland China is only a source of background control or occasional access, then the current delay is acceptable. For purely non-real-time services such as static content synchronization, API calls, and email processing, connections with a delay of more than 200 milliseconds are still available, without affecting data integrity and business logic. However, if the application has high requirements for interaction speed, such as online video, voice communication, remote desktop control, etc., it is more sensitive to delays of more than 250 milliseconds, and experience problems such as screen freezes, input delays, and slow loading may occur.
In terms of solving cross-continental high latency, a variety of optimization methods can be used, such as deploying edge caches through transit nodes to accelerate resource access; using smart DNS to schedule access nodes according to user regions; or using international CDN and SD-WAN technology to divert user requests to better links. In addition, a dual-cloud deployment strategy in China and Mexico can also be adopted, with front-end nodes deployed in mainland China and Mexico as the main data center. Data synchronization is completed through an asynchronous mechanism, thereby avoiding problems caused by real-time high latency.
In terms of bandwidth, the uplink bandwidth provided by local cloud service providers in Mexico is usually sufficient, with a single instance supporting 100Mbps to 1Gbps, which is sufficient to carry regular data synchronization tasks. However, large bandwidth does not mean low latency. Bandwidth affects throughput, while latency affects response time. Therefore, although the bandwidth of the Mexican server is sufficient, for application scenarios with frequent access and intensive data interaction, it is still necessary to deploy cache services nearby in mainland China.
Test results show that during non-peak hours (2 a.m. to 7 a.m.), the latency of accessing Mexican cloud servers from mainland China is relatively low, generally between 240 and 280 milliseconds, and the packet loss rate is less than 1%. During the network peak hours (7 p.m. to 11 p.m.), the latency fluctuates greatly, reaching more than 350 milliseconds in some areas, and the packet loss rate occasionally exceeds 2%. This situation poses potential risks to the deployment of applications with high stability requirements. Therefore, when choosing a Mexican server to host Chinese products or services, the user access period, data interaction frequency, and business tolerance should be evaluated in advance.
In summary, the average latency of accessing Mexican cloud servers from mainland China is between 240 milliseconds and 350 milliseconds, and may be higher for some operators and during peak hours. Due to geographical distance and network structure, it is not currently suitable for deploying latency-sensitive applications. If the company mainly targets Latin American users, Mexico is a cost-effective server deployment option. However, if the Chinese mainland market needs to be taken into account, it is recommended to use intermediate acceleration, bilateral deployment or cross-border cloud interconnection to optimize, so as to ensure the consistency and stability of the global business access experience.
