Network Resource

ZStack network resource mainly includes:

Network diagram
SDN controller
L2 network resource
L3 network
Route resource
VPC

Network Diagram

The diagram not only provides a direct display of global diagrams on the cloud and helps you to analyze network problems, but also enables you to generate custom network diagrams where you can quickly locate the resource states.

SDN Controller

By adding SDN controllers, you can take over the SDN networks of hardware switches on the cloud to lower the network latency and improve the VXLAN network performance.

L2 Network Resource

An L2 network resource includes a VXLAN pool and an L2 network.

An L2 network corresponds to a layer 2 broadcast domain. This L2 network supports multiple network types, such as L2NoVlanNetwork, L2VlanNetwork, VxlanNetwork, and HardwareVxlanNetwork.
L2NoVlanNetwork and L2VlanNetwork is a group that must be identical to the configurations of compute node ports on the switch sides.
Both VXLAN Pool and VxlanNetwork with the hardware SDN type provide the VxlanNetwork configurations. Before you use VxlanNetwork, create a VXLAN Pool first. After you create the VXLAN Pool successfully, create VxlanNetwork by specifying or randomly choosing VNIs.
Both VXLAN Pool and HardwareVxlanNetwork with the hardware type provide the HardwareVxlanNetwork configurations. Before you use HardwareVxlanNetwork, create a VXLAN Pool first. After you create the VXLAN Pool successfully, create HardwareVxlanNetwork by specifying or randomly choosing VNIs.

L3 Network

An L3 network can serve as a sub-resource of the L2 network. Mainly based on the L2 network, the L3 network provides the network configurations for VM instances, including the IP range, gateway, DNS and network service.

Route Resource

ZStack provides the network services of VM instances by using custom Linux VM instances to serve as routing devices. Related route resources mainly include vRouters, vRouter images, vRouter offerings, and vRouter tables.

VPC

VPC is the custom private cloud network environment that is jointly comprised by a VPC vRouter and a VPC network. VPC can help enterprise users to build a logically isolated private cloud. In addition, VPC features lie at the flexible network configuration, secure, reliable isolation, and optimization of east-west network traffic direction. A VPC network can act as a private VPC network to provide multiple network services by using a VPC vRouter.

Network Usage Procedure

You need to first create an L2 network, and then use it to create an L3 network. Finally, use these networks to provide multiple network services.

Network Architecture Model

ZStack supports three basic network architecture models: flat network, vRouter network, and VPC.

Flat Network
- A flat network supports multiple network services: DHCP, EIP, security group, and User Data.
- The network services of the flat network adopt the distributed DHCP and the distributed EIP structure.
- The DHCP service of the flat network can also include the DNS feature.
- The network model used by the initialization guide adopts the flat network.
- ZStack supports the flat network infrastructure based on both VxlanNetwork and HardwareVxlanNetwork.
vRouter Network
- A vRouter network can support multiple network services: DHCP, DNS, SNAT, vRouter table, EIP, port forwarding, load balancing, IPsec tunnel, and security group.
- The DHCP service of the vRouter network adopts the distributed DHCP by default.
- The vRouter provides multiple network services by mainly using custom Linux VM instances as routing devices.
- ZStack supports the vRouter network infrastructure based on VxlanNetwork.
VPC
- VPC supports also multiple network services: DHCP, DNS, SNAT, vRouter table, EIP, port forwarding, load balancing, IPsec tunnel, security group, dynamic routing, multicast routing, VPC firewall, and Netflow.
- The DHCP service of a VPC adopts the distributed DHCP by default.
- VPC provides multiple network services by mainly using custom Linux VM instances as VPC vRouters.
- Network services such as port forwarding, load balancing, IPsec tunnel, and vRouter table can apply to multiple subnets of a VPC simultaneously to further improve network efficiencies.
- ZStack supports the VPC network infrastructure based on VxlanNetwork.
- ZStack supports the distributed routing feature to optimize east-west network traffics, and to lower network latencies.

For more information about the network service, see Network Service.

Network Protocol

ZStack public network, flat network, and VPC network support two network protocols: IPv4 and IPv6. You can create an IPv4 network, an IPv6 network, or an IPv4+IPv6 network as needed.

Network Diagram

ZStack supports the network diagram feature. Notice that the Cloud not only supports the global diagram (All), but also allows you to generate your own diagram (Custom) by selecting resources where you can quickly locate the resource states.

Global Diagram

Global Diagram Page

In the navigation pane of the ZStack Private Cloud UI, choose Network Resource > Network Diagram to directly enter the All page, as shown in All. Notice that the global diagram is equal to All in Network Diagram.

Global Diagram Operations

You can perform the following operations on a global diagram:

Check: Allow you to directly check the network diagram of the entire cloud.
Refresh: Click the refresh button at the upper left on the UI to display the latest global diagram.
Export: Click the Export button at the upper left on the UI to export the current global diagram as the png format.
Search: Click the Search button at the upper right on the UI to display the Search box. You can conduct searches by resource types and resource properties.
- Supported resource types: VM instance, router (vRouter or VPC vRouter), private network, and public network.
- Supported resource properties: resource name, resource UUID, IP address, and EIP.
Zoom in/out: Click the Zoom In or Zoom Out button at the lower right on the UI to zoom in or out the current network diagram.
Default: Click the Default button at the lower right on the UI to recover the network diagram that you have zoomed in or out to the default size.
Highlighted display via resource selection: Select the resource to be highlighted. When you select a resource, you can highlight that resource and its associated resources.
Floated display of resource information: Provide a floating display of a resource to which you hover over. The related information of the resource will be automatically floated on the UI.
Open console: Open the console of the resource to which you hover over. The related information of the resource will be automatically floated on the UI. Then, click the console button at the upper right of the floating page to open the console of the resource.

State display of router or VM instance: Manipulate real-time states of routers or VM instances by the dot colors at the upper right of the resources. For more information, see State Display Definition for Router or VM Instance.

Table 1. State Display Definition for Router or VM Instance
Router/VM State	Dot Color
Starting	Blue
Running	Green
Stopping	Blue
Stopped	Red
Rebooting	Blue
Deleting	Blue
Deleted	Grey
Migrating	Blue
Expunging	Blue
Pausing	Blue
Paused	Grey
Recovering	Blue
Unknown	Yellow

Custom Diagram

Custom Diagram Page

In the navigation pane of the ZStack Private Cloud, choose Network Resource > Network Diagram > Custom to enter the Custom page, as shown in Custom. Notice that the custom diagram is equal to Custom in Network Diagram.

Custom Diagram Operations

You can perform the following operations on a custom diagram:

Generate and check diagram by specifying resource: Generate and check a corresponding network diagram by specifying resources. Currently, these resources include VM instance, router (vRouter or VPC vRouter), private network, and public network.
Refresh: Click the refresh button at the upper left on the UI to display the latest diagram.
Export: Click the Export button at the upper left on the UI to export the current diagram as the png format.
Search: Click the Search button at the upper right on the UI to display the Search box. You can conduct searches by resource types and resource properties.
- Generate the custom network diagram in advance. By using the Search button, you can conduct searches for the resources on the custom diagram.
- Supported resource types: VM instance, router (vRouter or VPC vRouter), private network, and public network.
- Supported resource properties: resource name, resource UUID, IP address, and EIP.
Zoom in/out: Click the Zoom In or Zoom Out button at the lower right on the UI to zoom in or out the current network diagram.
Default: Click the Default button at the lower right on the UI to recover the network diagram that you have zoomed in or out to the default size.
Highlighted display via resource selection: Select the resource to be highlighted. When you select a resource, you can highlight that resource and its associated resources.
Floated display of resource information: Provide a floating display of a resource to which you hover over. The related information of the resource will be automatically floated on the UI.
Open console: Open the console of the resource to which you hover over. The related information of the resource will be automatically floated on the UI. Then, click the console button at the upper right of the floating page to open the console of the resource.
State display of router or VM instance: Manipulate real-time states of routers or VM instances by the dot colors at the upper right of the resources. For more information, see Table 1.