KT expands its IDC internet backbone network in the metropolitan area by 10 times.
Expanding switch bandwidth to protect against DDoS attacks


KT announced on the 2nd that it has expanded its "One IDC" internet backbone, which connects six IDCs in the Seoul metropolitan area (Yongsan, Mokdong 1 & 2, Gangnam, Bundang, and Yeouido), with a terabit network. This represents a tenfold increase in capacity compared to the existing IDC backbone. With the terabit network, companies using KT's IDCs in the Seoul metropolitan area can now expand their internet access by 100 gigabits per second.

"One IDC" is a technology that connects KT IDCs located in the metropolitan area to form a single, massive IDC. KT One IDC is the first in Korea to combine multiple IDCs into a single IDC. Even if a single IDC suddenly experiences a large volume of traffic, it can still provide data services by connecting to the backbone network via an adjacent IDC.

Furthermore, even if IT resources are distributed across multiple IDCs, they can be integrated and managed as a single virtual network without the need for expensive physical circuit configurations. Switch bandwidth has also been increased tenfold to minimize the impact of distributed denial-of-service (DDoS) attacks. A comprehensive network solution that flexibly controls traffic flow is also being implemented for the first time in Korea in an IDC. When a DDoS attack occurs, traffic temporarily increases, and this is quickly diverted.

The total network solution incorporates various new network technologies, including Segment Routing and EVPN (Ethernet VPN). Segment Routing automatically adjusts traffic paths for each service. EVPN is optimized for logically interconnecting physically separate data centers.

Meanwhile, KT IDC offers a variety of value-added services. Companies using KT IDC can easily connect to various public clouds like AWS and Azure without additional dedicated lines, regardless of which IDC they are located in within the metropolitan area. Even non-KT IDC customers can enjoy low-cost short-distance dedicated line connections to IDCs near the metropolitan area.

“The traffic levels that corporate customers want have increased from ‘gigabit’ to ‘terabyte’, so we have completed network expansion and application of new technologies,” said Lee Mi-hee, executive director of KT’s Cloud/DX business division. “As the largest IDC operator in Korea, we will meet the changing expectations of our customers.”