I use serial consoles on all my OpenBSD servers for remote serial access to the machines, both during initial install via pxeboot, and later on in regular use after the install. I'm currently running either 4.2 or 4.1 on all my machines.
The FAQ states: Only the first serial port (com0) is supported for console on amd64 and i386 http://www.openbsd.org/faq/faq7.html#SerCon Why is this the case? Why does OpenBSD care which serial port I use? Will it simply not work if I specify "set tty com1" in /etc/boot.conf ? I ask because my servers of choice are made by Rackable Systems, and their default configuration is to route the serial port known to as com1 to a special RJ-45 connector, that also supports BIOS redirection, and even serial access to power cycle the machine. Having my OpenBSD servers use that for the console would be ideal. FYI, my Solaris10/x86 servers happily use that port for the console, and there is no need to turn off Continue Console Redirection after POST, as also recommend in the OpenBSD FAQ: Some BIOSs have an option to "Continue Console Redirection after POST" (Power On Self Test), this should be set to "OFF", so the boot loader and the kernel can handle their own console. I'd very much appreciate any insight into these questions. Best regards, Don