Cisco ASA 5505 Configuration Manual page 231

Chapter 8 Configuring Interfaces
An active VLAN is a VLAN with a nameif command configured.
Note
With the Base license, the third VLAN can only be configured to initiate traffic to one other VLAN. See
Figure 8-1
cannot initiate contact with Business.
Figure 8-1
with Base License
With the Security Plus license, you can configure 20 VLAN interfaces, including a VLAN interface for
failover and a VLAN interface as a backup link to your ISP. You can configure the backup interface to
not pass through traffic unless the route through the primary interface fails. You can configure trunk
ports to accommodate multiple VLANs per port.
The ASA 5505 adaptive security appliance supports Active/Standby failover, but not Stateful Failover.
Note
OL-20339-01
for an example network where the Home VLAN can communicate with the Internet, but
ASA 5505 Adaptive Security Appliance with Base License
Internet
ASA 5505
Business
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Information About Interfaces
8-3