FTOS Configuration Guide for the C-Series - Force10 Networks

To confirm that the interface is enabled, use the show config command in the INTERFACE mode.
To leave the INTERFACE mode, use the exit command or end command.
You cannot delete a physical interface.
Configuring Layer 2 mode
As stated, you must place interfaces in Layer 2 mode to configure Layer 2 protocols on the interface, such
as Spanning Tree Protocol.
To configure an interface in Layer 2 mode, use these commands in the INTERFACE mode:
Command Syntax Command Mode Purpose
no shutdown INTERFACE Enable the interface.
switchport INTERFACE Place the interface in Layer 2 (switching) mode.
For information on enabling and configuring Spanning Tree Protocol, see Chapter 9, Layer 2, on page 181.
To view the interfaces in Layer 2 mode, use the command show interfaces switchport (Figure 176) in the
EXEC mode.
Configuring Layer 3 mode
By assigning an IP address to a physical interface, you place it in Layer 3 mode. Routed traffic now passes
through the interface and you can configure routing protocols on that interface.
To assign an IP address, use both of these commands in the INTERFACE mode:
Command Syntax Command Mode Purpose
no shutdown INTERFACE Enable the interface.
ip address ip-address mask [secondary] INTERFACE Configure a primary IP address and mask
on the interface. The ip-address must be
in dotted-decimal format (A.B.C.D) and
the mask must be in slash format (/xx).
Add the keyword secondary if the IP
address is the interface’s backup IP
address.
You can only configure one primary IP address per interface. You can have up to 255 secondary IP
addresses per interface.
To view all interfaces to see which have an IP address assigned, use the show ip interfaces brief command
(Figure 175).
250 Interfaces