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CHAPTER
7-1
Cisco ASDM User Guide
OL-16647-01
7
Configuring Interfaces in Single Mode
This chapter describes how to configure and enable physical Ethernet interfaces, how to create redundant
interface pairs, and how to add subinterfaces. If you have both fiber and copper Ethernet ports (for
example, on the 4GE SSM for the ASA 5510 and higher series adaptive security appliance), this chapter
describes how to configure the interface media type. For each interface (physical, redundant, or
subinterface), you must also configure a name, security level, and IP address (routed mode only).
Note To configure interfaces for the ASA 5505 adaptive security appliance, see Chapter 9, “Configuring
Switch Ports and VLAN Interfaces for the Cisco ASA 5505 Adaptive Security Appliance.”
To configure interfaces in multiple context mode, see Chapter 8, “Configuring Interfaces in Multiple
Mode.”
This chapter includes the following sections:
• Interface Overview, page 7-1
• Configuring an Interface (Single Mode), page 7-5
• Enabling Same Security Level Communication (Single Mode), page 7-8
• PPPoE IP Address and Route Settings, page 7-9
Interface Overview
This section describes physical interfaces, redundant interfaces, and subinterfaces, and includes the
following topics:
• Physical Interface Overview, page 7-1
• Redundant Interface Overview, page 7-2
• VLAN Subinterface and 802.1Q Trunking Overview, page 7-3
• Default State of Interfaces, page 7-4
• Default Security Level, page 7-4
Physical Interface Overview
This section describes physical interfaces, and includes the following topics.