15 Mar 2018

Internet Connectivity in China

Internet Connectivity in China

CDS offers Internet accessibility with direct BGP peering to all four Tier 1 carriers in mainland China as well as all local carriers assuring the best and fastest coverage nationwide.

If you are unfamiliar with China’s Internet you may wonder why BGP peering matters. The Internet infrastructure in China is very different than in the rest of the world. In China, there are only four major providers: China Telecom, China Unicom, China Netcom and Education Net (CERNET). Despite the enormous demands made by cross-network traffic, these four networks are connected to each other by only three primary access points rather than a full mesh topology like the rest of the world. Due to the limited bandwidth at these access points, cross-network traffic often experiences substantial delays.

Without multi-line BGP, even local Internet traffic would have to go through an access point which might be thousands of miles away. Over the last 15 years, CDS has developed direct peering agreements with all Tier 1 providers and the local carriers assuring direct connections between carriers.

For example, a China Unicom user can ping a server in the same city on CERNET, and experience up to a 400ms delay. The data must travel on the China Unicom AS to the connecting node which might be a thousand miles away to access CERNET, then travel back on the CERNET sub-network to the server.

With multi-line BGP, the same ping would only take 20-30ms.

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