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CHAPTER
14-1
Cisco ASA 5500 Series Configuration Guide using ASDM
14
Completing Interface Configuration
(Routed Mode)
This chapter includes tasks to complete the interface configuration for all models in routed firewall
mode. This chapter includes the following sections:
• Information About Completing Interface Configuration in Routed Mode, page 14-1
• Licensing Requirements for Completing Interface Configuration in Routed Mode, page 14-2
• Guidelines and Limitations, page 14-5
• Default Settings, page 14-5
• Completing Interface Configuration in Routed Mode, page 14-5
• Monitoring Interfaces, page 14-22
• Feature History for Interfaces in Routed Mode, page 14-29
Note For multiple context mode, complete the tasks in this section in the context execution space. In the
Configuration > Device List pane, double-click the context name under the active device IP address.
Information About Completing Interface Configuration in Routed
Mode
This section includes the following topics:
• Security Levels, page 14-1
• Dual IP Stack (IPv4 and IPv6), page 14-2
Security Levels
Each interface must have a security level from 0 (lowest) to 100 (highest). For example, you should
assign your most secure network, such as the inside host network, to level 100. While the outside
network connected to the Internet can be level 0. Other networks, such as DMZs can be in between. You
can assign interfaces to the same security level. See the “Allowing Same Security Level Communication”
section on page 14-21 for more information.
The level controls the following behavior: