Why Network Architecture Is the Backbone of Cloud Computing: Insights and Best Practices

1. Network Importance for Cloud Computing

In cloud computing, the network comes first; without a reliable network, even the best compute resources are ineffective.

Key questions: What factors do internet businesses consider when choosing cloud resources? Are performance, security, stability, flexibility, and brand the main concerns? How many users focus heavily on network quality?

Internet services differ from enterprise services:

Enterprise workloads only need the cloud platform to host applications.

Internet‑facing services must deliver content to end users; regardless of IaaS, PaaS, or SaaS, poor network performance nullifies any compute advantage.

2. China’s Large‑Scale Network Environment

Background: The three major T1 operators—China Unicom, China Mobile, and China Telecom—control nearly 90% of fixed‑line users and almost all mobile users. Other ISPs rely on these operators for network exits.

Because of this dominance, covering the three operators’ networks generally provides nationwide reach. Large companies may also connect to education networks, broadband providers, and broadcasting networks for finer coverage.

Each operator maintains two backbone networks; aside from a slower integration for Mobile‑TieTong, the structures are similar, so considering these three networks usually suffices.

However, inter‑operator connectivity is poor, creating a distinct Chinese network environment.

China Telecom operates nine major nodes (Chengdu, Nanjing, Xi’an, Wuhan, Shenyang, Guangzhou, Shanghai, Beijing, Hangzhou), with Beijing, Shanghai, and Guangzhou serving as super‑nodes and international gateways.

China Unicom has four primary nodes (Beijing 2, Shanghai 1, Guangzhou 1) and is progressively flattening its network with direct links to many regional cities.

China Mobile mirrors China Telecom with nine backbone nodes, including the same super‑nodes and international exits.

3. Achieving Inter‑Operator Connectivity

Although the backbone structures are similar, practical interconnection between the three operators is often problematic.

Common solutions for users

Deploy separate instances within each operator’s network.

Multi‑line, multi‑IP: use a single data center with connections to multiple operators and manage DNS and routing intelligently.

Static BGP: announce the same IP block via static routes on each operator (no AS number).

Dynamic BGP: announce the same IP block with proper AS numbers on each operator’s BGP.

4. Choosing the Right Network for Your Business

Mobile‑centric services typically require BGP.

PC‑oriented services (games, websites) may use per‑operator deployment or multi‑line, multi‑IP depending on specific needs.

Most public clouds now offer BGP‑based networking, which aggregates multiple operator links, increasing fault impact; therefore selecting a reliable BGP‑enabled data center is crucial.

Many domestic BGP routes are static; some traverse long‑haul links, so network availability and cost vary significantly with the chosen path.

Key Considerations for Cloud Network Selection

Choose a high‑grade BGP data center with redundant infrastructure.

Select a BGP network with strong local coverage; major cities like Beijing, Shanghai, and Guangzhou are optimal.

Ensure the provider can mitigate DDoS attacks, as such threats are commonplace.

Network Evaluation Model

Test latency, packet loss, and jitter from the data center.

Use traceroute to map topology and prefer routes close to backbone nodes.

Analyze client‑side metrics from large user bases.

Assess baseline environment against T3+ standards.

Monitor carrier‑level backend network health.

Evaluate resource capacity, scalability, availability mechanisms, and incident response.

Review DDoS mitigation strategies.

Summary

Network quality is critical for cloud computing.

Due to poor inter‑operator links in China, select multi‑line BGP resources for mobile or nationwide coverage.

Beijing and other tier‑1 cities are preferred for high‑quality multi‑line BGP.

From a cloud user perspective, test network performance and choose data centers that meet your service’s network requirements.