The FO and FO_AA licenses are intended to be used solely for units in a failover configuration and not for units in standalone mode. If a failover unit with one of these licenses is used in standalone mode, the unit will reboot at least once every 24 hours until the unit is returned to failover duty. A unit with an FO or FO_AA license operates in standalone mode if it is booted without being connected to a failover peer with a UR license. If the unit with a UR license in a failover pair fails and is removed from the configuration, the unit with the FO or FO_AA license will not automatically reboot every 24 hours; it will operate uninterrupted unless the it is manually rebooted.
When the unit automatically reboots, the following message displays on the console:
The failover unit will not be affected by the 24-hours reboot (happens only if you try to use it as standalone pix without the rpesense of primary pix) because the failover cable is still attached to the failover serial port (failover cable mark as secondary).
Whenever the failover unit is down (no pwer supply, etc), then power up again, it will detect the presense of the serial failover cable (plus detecting failover configuration), thus preventing the once-in-every 24-hour automatic reboot behavior.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
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