Last Modified: Apr 28, 2025
                                            Affected Product(s):
                                            BIG-IP Install/Upgrade, LTM
                                        
                                            Known Affected Versions:
                                            11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4
                                        
                                            Fixed In:
                                            12.1.0, 11.6.0 HF6, 11.5.4
                                        
                                Opened: Jun 19, 2015 Severity: 3-Major Related Article: 
K17182                                        
                                
                                    
When upgrading to an affected version, if a NAT has a name with spaces in it, the upgraded configuration does not load.
The configuration does not load on the upgraded system.
The BIG-IP system must be configured with NATs that have spaces in their names. When an upgrade is performed to 11.5.0 through 11.5.3 or to 11.6.0 this can be triggered.
Remove spaces in NAT names before upgrading. Specifically: the initial letter must be a letter, underscore ( _ ), or forward slash ( / ), and subsequent characters may be letters, numbers, periods ( . ), hyphens ( - ), underscores ( _ ), or forward slashes ( / ).
NAT names with spaces in them now upgrade properly.