PXE boot config:
"... console=tty0 console=ttyS0,115200 ..."
Note: serial console redirection is managed by hardware profile.
To check hardware profile:
$ tabdump nodehm
#node,power,mgt,cons,termserver,termport,conserver,serialport,serialspeed,serialflow,getmac,cmdmapping,consoleondemand,comments,disable "__HardwareProfile_IPMI",,"ipmi",,,,,,,,,"/opt/pcm/etc/hwmgt/mappings/HWCmdMapping_ipmi.xml",,, "__HardwareProfile_IBM_Flex_System_x",,"ipmi",,,,,"0","115200","hard",,"/opt/pcm/etc/hwmgt/mappings/HWCmdMapping_flex_x.xml",,, "__HardwareProfile_IBM_System_x_M4",,"ipmi",,,,,"0","115200","hard",,"/opt/pcm/etc/hwmgt/mappings/HWCmdMapping_rackmount_x.xml",,, "__HardwareProfile_IBM_iDataPlex_M4",,"ipmi",,,,,"0","115200","hard",,"/opt/pcm/etc/hwmgt/mappings/HWCmdMapping_rackmount_x.xml",,, "__HardwareProfile_IBM_NeXtScale_M4",,"ipmi",,,,,"0","115200","hard",,"/opt/pcm/etc/hwmgt/mappings/HWCmdMapping_nextscale_x.xml",,, "__Chassis_IBM_Flex_chassis",,"blade",,,,,,,,,,,,
To disable: clear the entries of serialport, serialspeed and serialflow columns
$ chdef -t group -o __HardwareProfile_IBM_Flex_System_x serialport= serialspeed= serialflow=