Dell Force10 E300, Configuration Manual, Page: 421 / 1262

Interfaces | 421
For information on enabling and configuring Spanning Tree Protocol, see Chapter 10, Layer 2, on page 47 .
To view the interfaces in Layer 2 mode, use the command
show interfaces switchport
in the EXEC mode.
Configure Layer 3 (Network) Mode
When you assign an IP address to a physical interface, you place it in Layer 3 mode. Use the
ip address
command and
no shutdown
command in INTERFACE mode to enable Layer 3 mode on an individual
interface. 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).
Figure 20-5 shows how the
show config
command displays an example of a Layer 3 interface.
Figure 20-5. show config Command Example of a Layer 3 Interface
If an interface is in the incorrect layer mode for a given command, an error message is displayed to the
user. For example, in
Figure 20-6 , the command
ip address
triggered an error message because the
interface is in Layer 2 mode and the
ip address
command is a Layer 3 command only.
Figure 20-6. Error Message When Trying to Add an IP Address to Layer 2 Interface
To determine the configuration of an interface, you can use the
show config
command in INTERFACE
mode or the various
show interface
commands in EXEC mode.
To assign an IP address, use both of the following commands in the INTERFACE mode:
Command Syntax Command Mode Purpose
no shutdown
INTERFACE Enable the interface.
FTOS(conf-if)#show config
!
interface GigabitEthernet 1/5
ip address 10.10.10.1 /24
no shutdown
FTOS(conf-if)#
FTOS(conf-if)#show config
!
interface GigabitEthernet 1/2
no ip address
switchport
no shutdown
FTOS(conf-if)#ip address 10.10.1.1 /24
% Error: Port is in Layer 2 mode Gi 1/2.
FTOS(conf-if)#
Error message