System Network

A system network is a network that is used specifically by a management node. For example, the system network can be a management network used for deploying and configuring associated resources, including deploying hosts, primary storages, backup storages, and vRouters. Also, the system network can be a migration network used for migrating VM instances. If network resources are insufficient, both the system network and the public network can share resources. An independent system network is only used for specific usages other than creating normal VM instances.

Create System Network

In the navigation pane of the ZStack Private Cloud UI, choose Network Resource > L3 Network > System Network. On the System Network page, click Create System Network. On the displayed Create System Network page, set the following parameters:
  • Name: Enter a name for the system network.
  • Description: Optional. Enter a description for the system network.
  • L2 Network: Select the corresponding L2 network for the system network.
    Note: ZStack Private Cloud allows you to create multiple L3 networks by using an L2 network. However, we do not recommend to do so unless you have special business requirements.
    Click the Plus sign (⊕) under the L2 Network field. Then, the Select L2 Network page is displayed on the right. This page has the following two tabs:
    • Default: Display a list of L2 networks that do not have an L3 network attached in the current zone.
    • All: Display a list of all L2 networks in the current zone, including the L2 networks that have or not have an L3 network attached.
  • Add IP Range: Add a network range, including IP range and CIDR.
    • If you select the IP range, set the following parameters:
      • Start IP: Enter a start IP address for the IP range, such as 172.20.108.100.
      • End IP: Enter an end IP address for the IP range, such as 172.20.108.120
        Note: The IP range specified within the start IP address and end IP address cannot contain IP addresses of the link-local address (169.254.0.0/16).
      • Netmask: Enter a netmask for the IP range, such as 255.255.0.0.
      • Gateway: Enter a gateway for the IP range, such as 172.20.0.1.
    • If you select CIDR, set the following parameters:
      • CIDR: Enter a CIDR of the IP range, such as 192.168.1.1/24.
        Note: The IP range specified in the CIDR cannot contain IP addresses of the link-local addresses (169.254.0.0/16).
      • Gateway: Set a gateway for the CIDR, such as 192.168.1.1.
        Note:
        • The first or the last allowed CIDR IP address can act as a gateway.
        • If null, the first IP address that is used by default will serve as a gateway.
You can create a system network, as shown in Create System Network.
Figure 1. Create System Network




System Network Operations

You can perform the following operations on a system network:
  • Create system network: Create a new system network.
  • Add network range: Add a new IP range for the system network.
  • Share to all: Share the system network to all projects or regular accounts. Make sure that you have installed the License of the Enterprise Management module.
  • Recall from all: Recall the system network from all projects or regular accounts. You can make these projects or regular accounts invisible. Make sure that you have installed the License of the Enterprise Management module.
  • Delete: Delete the system network.
    Note: If you delete the system network, the associated routers will be deleted as well.

Notice

When you create a vRouter offering, both public network and system network cannot use the same one IP range.