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Cisco ASA 5500 Series Configuration Guide using ASDM
OL-20339-01
Chapter 8 Configuring Interfaces
Guidelines and Limitations
The following table shows the licensing requirements for VLAN trunks:
Guidelines and Limitations
This section includes the guidelines and limitations for this feature.
Context Mode Guidelines
• In multiple context mode, configure the physical interfaces in the system execution space according
to the “Starting Interface Configuration (ASA 5510 and Higher)” section on page 8-9.
• Then, configure the logical interface parameters in the context execution space according to the
“Completing Interface Configuration (All Models)” section on page 8-21.
Firewall Mode Guidelines
Transparent firewall mode allows only two interfaces to pass through traffic; however, on the ASA 5510
and higher adaptive security appliance, you can use the Management 0/0 or 0/1 interface (either the
physical interface or a subinterface) as a third interface for management traffic. The mode is not
configurable in this case and must always be management-only.
Failover Guidelines
Do not finish configuring failover interfaces with the procedures in “Completing Interface Configuration
(All Models)” section on page 8-21. See the “Configuring Active/Standby Failover” section on
page 59-6 or the “Configuring Active/Active Failover” section on page 60-8 to configure the failover and
state links. In multiple context mode, failover interfaces are configured in the system configuration.
IPv6 Guidelines
• Supports IPv6.
Model License Requirement
ASA 5505 Base License: 3 (2 regular zones and 1 restricted zone that can only communicate with 1 other zone)
Security Plus License: 20
ASA 5510 Base License: 50
Security Plus License: 100
ASA 5520 Base License: 150
ASA 5540 Base License: 200
ASA 5550 Base License: 250
ASA 5580 Base License: 250
Model License Requirement
ASA 5505 Base License: None.
Security Plus License: 8.
All other models N/A
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