Date: Fri, 9 Aug 2002 13:14:38 -0500 (CDT) From: "Brandon D. Valentine" <bandix@geekpunk.net> To: Aled Morris <aledm@qix.co.uk> Cc: hackers@FreeBSD.ORG, Dan Langille <dan@langille.org> Subject: Re: serial console com1 to com1 == login race condition? Message-ID: <20020809131009.F272-100000@taran> In-Reply-To: <Pine.BSF.4.40.0208091901280.63589-100000@kai.qix.co.uk>
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On Fri, 9 Aug 2002, Aled Morris wrote: > On Fri, 9 Aug 2002, Terry Lambert wrote: > > >My money is on the hacked CR-greedy getty, though... > > Why not bring up ppp or slip on the line permanently 10.0.0.1 -> 10.0.0.2 > > Maybe you could bind a standalone telnetd to that IP only? The point is to be able to get in even when the machine is no longer responding to network traffic. Serial consoles are also nice for being able to break to the debugger and do your best to sync the disks before forcing a panic when there's no other way to bring the machine down. My question to Dan is, is there a reason you can't have two null modem cables strung between these machines? i.e. Machine1::Com1->Machine2::Com2 && Machine2::Com1->Machine1->Com2 This way you avoid the issue entirely. If these are 1U servers which for some reason only have one COM port, you could look at USB to serial adapters. I don't think the driver support is quite there in FreeBSD yet but it would be a good excuse to get one's feet wet with the USB subsystem and I'm sure those folks would be glad to help since I think USB serial converters are fairly high on their todo list. Brandon D. Valentine -- http://www.geekpunk.net bandix@geekpunk.net ++[>++++++<-]>[<++++++>-]<.>++++[>+++++<-]>[<+++++>-]<+.+++++++..++ +.>>+++++[<++++++>-]<++.<<+++++++++++++++.>.+++.------.--------.>+. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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