Hello List,
I'm ironing out details to upgrade a few systems to CentOS7.
My servers have BMC with Serial over LAN support. In C5 and C6, I determined how to have BIOS/POST, kernel, and serial console access. I'm reading up on the method to accomplish the pieces with C7.
Presently SoL output works, so I see BIOS/POST messages and the GRUB boot list. My changes to enable serial redirection for the kernel do not appear to work.
I've made the following changes to GRUB2's /etc/grub/default config file: -- removed rhgb -- added the console= settings to GRUB_CMDLINE_LINUX -- added the last two lines related to serial as detailed here [0].
* Is there an option to enable hardware flow control? I recall having to turn on flow control (agetty -h) to make it behave. No mention of flow control at [1] or [2]. Nor does RHEL7 doc [3] mention it.
I've already tweaked the systemd service I generated for ttyS1 (I'm using COM2 for SoL) and added the agetty "-h" option (for hardware flow control). Despite modifying the baud rate to reflect the BMC's settings, I only get symbols (so the console settings are amiss).
Would anyone be so kind as to share their experience? What has worked for your BMC/SoL configurations?
[0] https://fedoraproject.org/wiki/GRUB_2#Enable_Serial_Console_in_Grub [1] http://www.gnu.org/software/grub/manual/grub.html#Serial-terminal [2] http://www.gnu.org/software/grub/manual/grub.html#serial [3] https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/htm... [4] https://lists.centos.org/pipermail/centos/2014-October/146719.html