Bug ID 436212: Upgrades may fail if the base configuration does not use the 'auto' media-sfp setting for SFP ports ... Symptoms ... If a copper SFP module is installed and a configuration is loaded which sets that module's speed and duplex, this configuration might fail to load. ... The /var/log/ltm file shows an error similar to the following and the config fails to load. ... The upgrade fails after booting into TMOS for the first time. ... Conditions ... The system being upgraded has a copper SFP module installed in order to encounter this issue. ... There are two ways to arrive at this state: when upgrading and at runtime. ... This runtime error and its workaround is covered in K14556: Copper 1 Gbps modules configured with media other than the 'auto' setting may not function :: https://support.f5.com/csp/article/K14556. ... When applying a UCS from a previous version of TMOS, this condition can also be triggered. ... Workaround ... To work around this issue, edit /config/bigip_ba...