Dell Networking OS Behavior: The Z9000 system uses a single MAC address for all physical interfaces.Configuration Task List for Physical InterfacesBy default, all interfaces are operationally disabled and traffic does not pass through them.The following section includes information about optional configurations for physical interfaces:• Overview of Layer Modes• Configuring Layer 2 (Data Link) Mode• Configuring Layer 2 (Interface) Mode• Management Interfaces• Auto-Negotiation on Ethernet Interfaces• Adjusting the Keepalive Timer• Clearing Interface CountersOverview of Layer ModesOn all systems running Dell Networking OS, you can place physical interfaces, port channels, and VLANsin Layer 2 mode or Layer 3 mode.By default, VLANs are in Layer 2 mode.Type of Interface Possible Modes Requires Creation Default State10/100/1000 Ethernet,10 Gigabit EthernetLayer 2Layer 3No Shutdown (disabled)Management N/A No Shutdown (disabled)Loopback Layer 3 Yes No shutdown (enabled)Null interface N/A No EnabledPort Channel Layer 2Layer 3Yes Shutdown (disabled)VLAN Layer 2Layer 3Yes, except for thedefault VLAN.No shutdown (active forLayer 2)Shutdown (disabled forLayer 3)Configuring Layer 2 (Data Link) ModeDo not configure switching or Layer 2 protocols such as spanning tree protocol (STP) on an interfaceunless the interface has been set to Layer 2 mode.To set Layer 2 data transmissions through an individual interface, use the following command.• Enable Layer 2 data transmissions through an individual interface.INTERFACE modeswitchportInterfaces 325
