Network Intelligence Service:Network topology overview

Item

Description

Entity

The entities in a network topology represent resource instances of different types. For more information about the resource types that are supported by the network topology feature, see the Resource types section of this topic.

If you click an entity in a network topology, the following options are displayed in the entity toolbar:

• View the entity details page

• Analyze the instance

• Analyze reachability

• Analyze traffic

• View the vSwitch subnet topology

• View routes

• View associated routes

• View the CEN Topology

In a network topology, you can move the pointer over an entity icon to view the ID and name of the resource instance.

Entity collection

A network topology reflects resource relationships in a collection mode. Entities are aggregated according to the following rules:

• By default, entities of the same type are aggregated if more than one entity are attached to the same vSwitch.

• By default, vSwitch subnet topologies in a zone are aggregated if the number of the topologies is greater than one.

• By default, entities of the same type are aggregated if more than one entity are connected with each other in a virtual private cloud (VPC).

Connection

Entities are connected by dashed lines in a network topology. The connection relationships between entities are categorized into the following two types:

• Resource relationship

  In a resource topology, entities are connected by gray dashed lines, which indicate the resource relationships between entities. The connections that have a resource object are labeled in a resource topology, such as VPC peering connections, connections over Express Connect circuits, and intra-connections or inter-connections with transit routers.

• Routing relationship

  In a route topology, move the pointer over an entity. The orange dashed lines between entities indicate the connection paths between the entities. The connections are dynamically displayed, and the flow directions represent the directions of the entity routes.

Resource type

Entity type

Entity collection

Entity toolbar

References

VPC resource

vRouter

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vSwitch

In a VPC topology, multiple vSwitches in the same zone and their subnet topologies can be aggregated and expanded in the collection mode.

• Analyze reachability

• View the vSwitch subnet topology

• Work with the reachability analyzer

• View a vSwitch subnet topology

CLB instance

In a VPC topology, multiple CLB instances that are attached to the same vSwitch can be aggregated and expanded in the collection mode.

Analyze the instance

Work with instance diagnostics

VPC peering connection

In a VPC topology, multiple VPC peering connections are aggregated and expanded together with the peer VPCs in the collection mode.

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Internet NAT gateway

In a VPC topology, multiple Internet NAT gateways that are attached to the same vSwitch can be aggregated and expanded in the collection mode.

• Analyze the instance

• Analyze traffic

• Work with instance diagnostics

• Work with the Internet traffic analysis function

VPC NAT gateway

In a VPC topology, multiple VPC NAT gateways that are attached to the same vSwitch can be aggregated and expanded in the collection mode.

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Application Load Balancer (ALB) instance

• In a VPC topology, multiple ALB instances that are attached to the same vSwitch can be aggregated and expanded in the collection mode.

• In a VPC resource topology, an ALB instance can be displayed in different zones because the ALB instance can be deployed across zones.

Analyze the instance

Work with instance diagnostics

Public network resource

Elastic IP address (EIP)

In a VPC topology, EIPs that are bound to network resources are displayed as affiliated entities together with the network resources. EIPs that are not bound to network resources are not displayed in the network topology.

• Analyze the instance

• Analyze reachability

• Analyze traffic

• Work with instance diagnostics

• Work with the reachability analyzer

• Work with the Internet traffic analysis function

Interconnection resource

Virtual border router (VBR)

In a VPC topology, multiple VBRs in a VPC can be aggregated and expanded in the collection mode.

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Transit router

In a VPC topology, multiple transit routers in a VPC can be aggregated and expanded in the collection mode, in which the associated network instances are displayed together.

View the CEN Topology

Work with CEN topology

VPN gateway

In a VPC topology, multiple VPN gateways that are attached to the same vSwitch can be aggregated and expanded in the collection mode.

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Express Connect circuit

An Express Connect circuit is used to connect your data center to an access point of Alibaba Cloud. Multiple Express Connect circuits that are used to access a VPC can be aggregated and expanded in the collection mode.

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Cloud service

Elastic Compute Service (ECS) instance

In a VPC topology, multiple ECS instances that are attached to the same vSwitch can be aggregated and expanded in the collection mode.

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Device and site

Data center access point

In a VPC topology, data center access points are displayed together with Express Connect circuits. Access points indicate the geographical locations where Express Connect circuits are connected to Alibaba Cloud. Multiple access points in a VPC can be aggregated and expanded in the collection mode.

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Customer gateway

The customer gateways over the IPsec-VPN connections. Multiple customer gateways that are connected to the same VPN gateway can be aggregated and expanded in the collection mode.

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SSL-VPN client

Clients over SSL-VPN connections. Multiple clients that are connected to the same VPN gateway can be aggregated and expanded in the collection mode.

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