Configuring Layer 2 (Interface) Mode; Configuring Layer 3 (Network) Mode; Configuring Layer 3 (Interface) Mode - Dell S3048-ON Configuration Manual

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Configuring Layer 2 (Interface) Mode

To configure an interface in Layer 2 mode, use the following commands.

Enable the interface.

INTERFACE mode

Place the interface in Layer 2 (switching) mode.

INTERFACE mode

To view the interfaces in Layer 2 mode, use the show interfaces switchport command in EXEC mode.

When you assign an IP address to a physical interface, you place it in Layer 3 mode.

To enable Layer 3 mode on an individual interface, use the following commands. In all interface types except VLANs, the shutdown

command prevents all traffic from passing through the interface. In VLANs, the shutdown command prevents Layer 3 traffic from passing

through the interface. Layer 2 traffic is unaffected by the shutdown command. One of the interfaces in the system must be in Layer 3

mode before you configure or enter a Layer 3 protocol mode (for example, OSPF).

Enable Layer 3 on an individual interface

INTERFACE mode

ip address ip-address

Enable the interface.

INTERFACE mode

Example of Error Due to Issuing a Layer 3 Command on a Layer 2 Interface

If an interface is in the incorrect layer mode for a given command, an error message is displayed (shown in bold). In the following example,

the ip address command triggered an error message because the interface is in Layer 2 mode and the ip address command is a

Layer 3 command only.

Dell(conf-if)#show config

interface GigabitEthernet 1/2

no ip address

Dell(conf-if)#ip address 10.10.1.1 /24

% Error: Port is in Layer 2 mode Gi 1/2.

Dell(conf-if)#

To determine the configuration of an interface, use the show config command in INTERFACE mode or the various show interface

commands in EXEC mode.

To assign an IP address, use the following commands.

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