Cloud Enterprise Network:What is CEN?

Component

Name

Description

CEN instance

A CEN instance is the foundational resource for creating and managing an integrated cloud intelligent network. As the host for transit routers, a CEN instance contains one or more transit routers. You can create inter-region connections between multiple transit routers to build a flexible cloud network.

Transit router

A transit router is a key network element that forwards data within a region or across regions and supports flexible routing policies. Within a CEN instance, you can create one transit router in a region.

Network instance

A network instance is a crucial component of both cloud and on-premises network architectures. Common examples of network instances include Virtual private cloud (VPC), Express Connect Router (ECR), Cloud Connect Network (CCN), IPsec-VPN connection, Virtual Border Router (VBR), and transit router. Transit routers serve as a hub to connect these instances and enable data transfer and communication between networks.

Instance connection

An instance connection is formed when a network instance connects to a transit router. This allows for seamless connection between cloud resources, cross-region communication, and connectivity between cloud and on-premises resources.

To connect instances, you must choose an appropriate connection from VPC connection, ECR connection, CCN connection, VPN connection, VBR connection, and Inter-region connection.

Route table of transit router

Transit routers forward traffic from the instances by querying route tables. A transit router includes a default system route table and supports the creation of custom route tables. You can use associated forwarding and route learning to determine connection, isolation, and traffic redirection policies to cater to diverse networking requirements.

Global network

Low latency and high speed

Reliability and quality

Transit routers enable rapid connection of VPCs across regions and on-premises networks to facilitate global resource sharing. Each Enterprise Edition transit router can support up to 1,000 VPCs in the same region, accommodating network growth.

Transit routers offer low latency and fast network transmission. In the same region, the data transfer rate can reach the maximum rate supported by the device port. Because resources can communicate with each other on a global scale, network latency is significantly reduced compared to data transmission over the Internet.

Transit routers can be deployed in active and standby modes and traffic is automatically switched between modes to maintain service availability. Multiple sets of quality connections between any two nodes ensure that the network automatically converges during interruption events.

Enterprise-class networking

Pay-as-you-go and fast delivery

One-stop O&M

You can configure custom routing policies to meet enterprise-class networking requirements. For example, you can create a complex network topology that supports security domain isolation, demilitarized zones, and service chaining.

Pay-as-you-go billing is supported. When the connected instances are in the same region, you are charged only for the traffic that flows through the connected instances and transit routers. Inter-region connections can be quickly created and modified without purchasing devices or lines. This reduces network costs.

The console features a visual interface that is based on geographical locations and network resources. It gives you the ability to view the network topology within the same region and across different regions to grasp the operation state and enhance the efficiency of network maintenance.