Shared (VLAN or Multi-Netted) Ethernet Interfaces

The management, cluster host, OAM, and physical networks can share Ethernet or aggregated Ethernet interfaces using VLAN tagging or IP Multi-Netting.

The OAM, internal management, and cluster host networks can use VLAN tagging or IP Multi-Tagging, allowing them to share an Ethernet or aggregated Ethernet interface with other networks. The one restriction is that if the internal management network is implemented as a VLAN-tagged network, then it must be on the physical interface used for PXE booting.

The following arrangements are possible:

• One interface for the internal management network and internal cluster host network using multi-netting, another interface for OAM (on which container workloads are exposed externally) and one or more additional interfaces data networks. This is the default configuration.

• One interface for the internal management network, another interface for the OAM network, a third interface for the cluster host network, and one or more additional interfaces for data networks.

• One interface for the internal management network, with the OAM and cluster host networks also implemented on the interface using VLAN tagging, and additional interfaces for data networks .

For some typical interface scenarios, see Managed Kubernetes Cluster Hardware Requirements.

For more information about configuring VLAN interfaces, see StarlingX Node Configuration and Management: Configure VLAN Interfaces Using the CLI.