[Casper] Netbooting Across Subnets

[Ryan Harter]

I have also seen this and it's been hit or miss with our Intel  
machines.  It's hard to compare though with so many different networks  
setups.

The problem I have had with this is that we have more than one netboot  
image on our server, the default is just for imaging, but we also have  
a "Maintenance" image that has all of our diagnostic tools, and a  
bunch of other useful stuff, making it easy to do on site diagnostics  
and partitioning, etc.  With the bless command you don't have the  
option of choosing your image.  It is however great for booting to the  
default image.

Ryan Harter
UW - Stevens Point
Workstation Developer
715.346.2716
Ryan.Harter at uwsp.edu

On Dec 30, 2008, at 9:38 AM, Miles Leacy wrote:

> If you know the fqdn or IP address of the netboot server then you  
> can netboot from any subnet using the bless command.
>
> From the bless man page:
> NETBOOT MODE
>      NetBoot Mode has the following options:
>      --netboot                Instead of setting the active boot  
> selection to a disk-based volume, set the system to NetBoot.
>      --server protocol://[interface@]server
>                               A URL specification of how to boot the  
> system. Currently, the only protocol supported is BSDP
>                               ("bsdp"), Apple's Boot Service  
> Discovery Protocol. The interface is optional, and the server is the
>                               IPv4 address of the server in dotted- 
> quad notation. If there is not a specific server you'd like to
>                               use, pass "255.255.255.255" to have  
> the firmware broadcast for the first available server. Examples
>                               of this notation would be "bsdp:// 
> 255.255.255.255" and "bsdp://en1@17.203.12.203".
>      --nextonly               Same as for Folder Mode.
>      --options                Same as for Folder Mode.
>      --quiet                  Do not print any output
>      --verbose                Print verbose output
>
> The following command will netboot to the default image on the  
> netboot server at IP address 10.0.0.2.
>
> sudo bless --netboot --server bdsp://10.0.0.2
>
> Of course, you'll also have to issue the reboot command.
>
> I have had some difficulty with Power PC machines, but so far this  
> works as described with Intel systems.
>
> ----------
> Miles A. Leacy IV
>
>  Certified System Administrator 10.4
>  Certified Technical Coordinator 10.5
>  Certified Trainer
> Certified Casper Administrator
> ----------
> voice: 1-347-277-7321
> miles.leacy at themacadmin.com
> www.themacadmin.com
>
>
>
>
> 2008/12/30 Ryan Harter <rharter at uwsp.edu>
> In our environment we have to set up UDP helpers on the router in  
> order for NetBoot to work across subnets.  Mike Bombich has a good  
> white paper on this on his website at http://www.bombich.com/mactips/nbas.html 
> .
>
> Ryan Harter
> UW - Stevens Point
> Workstation Developer
> 715.346.2716
> Ryan.Harter at uwsp.edu
>
> On Dec 30, 2008, at 8:51 AM, Mark Hughes wrote:
>
>> I have a new lab that has been setup w/ Intel iMacs straight out of  
>> the box and I'm wanting to
>> use an existing image that we run on our laptops minus XP.  In  
>> testing I know this works fine.  The issue I'm
>> having is these machines are on a .12 subnet and the netboot server  
>> is on a .79 subnet and I think I remember Tom
>> mentioning that netboot doesn't like going across subnets.  Can  
>> anyone confirm that and have any suggestions that might help with  
>> this?
>>
>> Thanks in advance....
>>
>>
>> Mark Hughes, Apple Technician
>> TIS Department, KCKPS USD500
>> Cell 913-449-7791
>> mahughe at kckps.org
>> _______________________________________________
>> Casper mailing list
>> Casper at list.jamfsoftware.com
>> http://list.jamfsoftware.com/mailman/listinfo/casper
>
>
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