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List:       soekris-tech
Subject:    [Soekris-tech] Re: Diskless PXE clients: switching FreeBSDkernels
From:       soekris () house ! org (Chris Roehrig)
Date:       2004-03-23 23:57:25
Message-ID: F2A1CE76-7C23-11D8-B3DA-000A95791556 () house ! org
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Hi Matt,
     That looks like a good way to set up the DHCP stuff, but there's 
still the problem of getting different clients to use different kernels 
on the shared NFS client.   The problem is that the DHCP "filename" 
must always be "pxeroot".   I've tried specifying a kernel directly 
here, but it's too big for the PXE bootstrap ROM to load.    pxeroot 
acts just like /boot/loader and reads all of the bootloader files in 
/boot starting with loader.rc and currently doesn't have a simple way 
of conditionally switching kernels, except by writing a Forth script 
(hence the kern_switch.4th that I posted).

I have my DHCP set up with:   option root-path "192.168.32.2:/"  so 
that my PXE clients are sharing the same root as the NFS server itself, 
and I boot /kernel for the server and /kernel.NET4501 for my 4501 box.  
   This saves me from having to maintain a separate root tree in 
/usr/mboot.

-- Chris

On Mar 21, 2004, at 23:26, Matt Peterson wrote:

> This might be possible with DHCP, I've done something similar...
>
> subnet 192.168.250.0 netmask 255.255.255.0 {
> range 192.168.250.2 192.168.250.253;
> option routers 192.168.250.254;
> option subnet-mask 255.255.255.0;                # NFS server & path
> option root-path "192.168.250.1:/usr/mboot";
> }
>
> class "soekris" {
> match if substring (option vendor-class-identifier, 0, 20) = 
> "PXEClient:Arch:00000";
> # TFTP server & filename
> next-server 192.168.250.1;
> filename "pxeboot";
>
> }
>
> Chris Roehrig wrote:
>
>> I'm following up on my original question and cross-posting it to the  
>> Soekris list in case this is useful for anyone else.      If there's 
>> an  easier way to do this, I'd like to know!
>
>
>
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