Read this document to learn about the connection planning before building a network architecture for Direct Connect.
A connection planning improves the stability and high availability of the network architecture for Direct Connect, and minimizes the impact from failures including device, port/fiber optic component, connection and data center at the access point. See the table below for the description and cause of failures.
Failure | Description | Cause |
---|---|---|
Connection | The connection communication fails or many packets are discarded. | The connection is damaged. For example, the cable is cut off. |
Port/fiber optic component | The port/fiber optic component fails to be read or has an transfer exception due to hardware or software failures. |
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Network device | The exchange or router on the IDC side is unavailable. |
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Data center at the access point | The data center encounters network disconnection, or the access point is unavailable. | The data center cannot function normally due to earthquakes, fires or other disasters. |
The capacity planning is designed to meet business bandwidth requirements at a reasonable cost and guarantee the business operation in the event of a connection failure. To achieve this, you can:
Assume your business needs 3 Mpbs of bandwidth, you can apply for two connections with 5 Mpbs of bandwidth to each Tencent Cloud access point, each connection will be used about 30%. If one connection faults, the business traffic will quickly switch to the standby connection to ensure the business continuity. After the switchover, the standby connection will be used about 60%. In this way, only the connection load temporarily increases, and the business data is unaffected.
The expansion planning is designed to meet the surging business demand at a reasonable cost. Depending on the expansion cycle, you need to plan differently as follows:
Note:
A single expansion exceeding 100 Gbps of bandwidth requires a longer period. Please develop an expansion plan in advance for high-bandwidth businesses.
The disaster recovery is designed to improve the high availability of a network architecture and minimize the failure (including port/fiber optic component, network device, and data center at the access point) impact on business operations.
To avoid single points of failures, we recommend that you develop a disaster recovery plan for access points, physical lines, and hardware devices.
Assume you connect your local IDC to two intra-region Tencent Cloud access points according to [capacity planning (#capacity) requirements, as shown in the figure below. If the connection to access point A is disconnected due to port/fiber optic component, network devices or data center failures, the business traffic will quickly switch to the connection to access point B, without losing business data or interrupting businesses.
Tencent Cloud provides the following four network architectures for Direct Connect to facilitate your network planning.
Architecture | Use Case | Business Elasticity | Availability | Cost |
---|---|---|---|---|
Four connections to two access points (recommended) | Suitable for use cases that require excellent business availability and elasticity, including the key production and real-time data transaction. | Highest | Highest | Highest |
Two connections to two access points (recommended) | Suitable for key business that requires high availability and elasticity. | Medium | Higher | Medium |
Two connections to one access point | Suitable for non-critical business, including the cloud development and testing environments. | Medium | Medium | Medium |
Connection to one access point | Suitable for non-critical business that does not require high elasticity and availability. | Low | Low | Low |
The following table describes the impact of this network architecture on business under various failures when the planning ideas are met.
Failure | Business Impact |
---|---|
Connection | The connections loads increase, and the business continues. |
Port/fiber optic component | The connections loads increase, and the business continues. |
Network device | The connections loads increase, and the business continues. |
Data center at the access point | The connections loads increase, and the business continues. |
The following table describes the impact of this network architecture on businesses under various failures.
Failure | Business Impact | Recovery Measures |
---|---|---|
Connection |
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If the business data is lost, you need to apply for a new connection and spend 2-3 months to restore the business. |
Network device |
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If business data is lost, you need to check and repair the network devices. The recovery time depends on the specific failure. |
Port/fiber optic component |
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If business data is lost, you need to check and repair the ports or fiber optic components. The recovery time depends on the specific failure. |
Data center at the access point |
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If business data is lost, you can:
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The following table describes the impact of this network architecture on businesses under various failures.
Failure | Business Impact | Recovery Measures |
---|---|---|
Connection | If the business data is lost, you need to apply for a new connection and spend 2-3 months to restore the business. | |
Network device | The business will be interrupted. | You need to troubleshoot and repair the faulty network devices. The recovery time depends on the specific failure. |
Port/fiber optic module | The business will be interrupted. | You need to troubleshoot and repair the faulty local ports or fiber optic components. The recovery time depends on the specific failure. |
Data center at the access point | The business will be interrupted. |
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The following table describes the impact of this network architecture on businesses under various failures.
Failure | Business Impact | Recovery Measures |
---|---|---|
Connection | The business will be interrupted. | Reapply for a connection. The recovery takes about 2-3 months. |
Network device | The business will be interrupted. | You need to troubleshoot and repair the faulty network devices. The recovery time depends on the specific failure. |
Port/fiber optic module | The business will be interrupted. | You need to troubleshoot and repair the faulty local ports or fiber optic components. The recovery time depends on the specific failure. |
Data center at the access point | The business will be interrupted. |
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