Cisco PIX 515E Licenses
License Function
Restricted Software License Support for 32 MB of RAM and up to three 10/100 interfaces.
The restricted license supports only limited VPN connectivity and
does not support failover.
Unrestricted Software License Support for 64 MB of RAM, up to six 10/100 interfaces, stateful
failover, integrated VAC or VAC+, and 5 security contexts.
Failover Software License Support for a “hot standby” system designed to operate in
conjunction with an active system running the unrestricted
license.