Cisco Cisco ASA for Nexus 1000V Series Switch Guía De Instalación

The major changes in Version 8.3 that require migration are as follows:

Real IP addresses in access lists, where access lists are used in supported features—When using 
NAT or PAT, you used to have to specify the mapped addresses and ports in an access list for all 
features that use access lists. Now, for several supported features, you must use the real, untranslated 
IP address and ports. (Other features continue to use the mapped IP address).

NAT—The NAT feature has been redesigned for increased flexibility and functionality. All NAT and 
NAT-related commands have been redesigned.

Named Network and Service Objects—Network and service objects are automatically created for 
NAT.

Although you can use named network and service objects in other features, such as access 
lists and object groups, objects are not automatically created for any feature other than NAT.

When upgrading from 8.3 or 8.4(1) to 8.4(2), migration for static identity NAT will occur to preserve 
existing functionality. See the 

for more information.

The old startup configuration is automatically saved in flash memory. The NAT migration file and the 
bootup error log, which includes any migration messages, is automatically saved to flash memory as 
well.

This section includes the following topics:

The following old startup configuration files are saved in flash memory:

Single mode configuration file or multiple mode system 
configuration—disk0:major_minor_maint_interim_startup_cfg.sav where 
major_minor_maint_interim is the old OS version number.

For example, 8_2_1_0_startup_cfg.sav.

Multiple mode context configuration (if present in flash 
memory)—disk0:major_minor_maint_interim_context_cfg.sav where 
major_minor_maint_interim is the old OS version number and context is the context name.

For example, 8_2_1_0_context1_cfg.sav.