Subnetwork

As explained in Google Anthos in Action

A subnetwork is a layer-2 VLAN subnet within a GDCE virtual network with its own broadcast domain and customer-assigned address range.

A subnetwork is a layer-2 VLAN subnet inside a GDCE network. It defines a customer-assigned CIDR address range and its own broadcast domain. section 8.3.1

Use subnetworks to segment traffic within a GDCE zone:

• Subnetworks in the same network can reach one another. section 8.3.1
• Subnetworks belonging to different networks cannot reach one another. section 8.3.1
• Additional subnetworks can connect customer networks to specialized Pod interfaces, such as operations, administration, and management or signaling networks. section 8.3.1

Network-functions segmentation

A customer can place operations, administration, and management traffic and signaling traffic in separate subnetworks, then connect those subnetworks to the corresponding network-function Pod interfaces. section 8.3.1

Figure 8.5 Google Distributed Cloud Edge network resource model

Use the network resource model to trace how subnetworks relate to networks, interconnects, attachments, and routers. section 8.3.1

How Google Anthos in Action covers it

How deep it goes

Defines VLAN, broadcast-domain, address-range, and reachability behavior, while deferring detailed provisioning procedures.

Examples

Uses separate operations, administration, and management and signaling subnetworks for network-function Pods.

What you can do after

Evaluate GDCE network segmentation and determine how subnetworks participate in Pod and customer-network connectivity.

How it connects

Relates subnetworks to GDCE networks, Pod interfaces, interconnect attachments, routers, and customer networks.

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Related concepts

• virtual networkpart of · A virtual network is a logically isolated, software-defined network that connects virtualized resources and controls communication among them and with external networks.

This explainer was generated by Manning's knowledge graph from the text of Google Anthos in Action. The section links point to the parts of the book it draws on.