[ipxe-devel] [gPXE] what is gpxe-encap-opts option used for?

[Dylan's PCs]

On 02/10/2012 03:21 PM, Michael Brown wrote:
> On Friday 10 Feb 2012 19:21:34 Ledochowski, Roy wrote:
>> Hi all-
>>
>> New member here.  Can anyone out there explain or point me to an
>> explanation of what gPXE uses
>>
>> option gpxe-encap-opts code 175 = encapsulate gpxe;
>>
>> for?  In our packet sniffs we see gPXE requesting it, but we don't
>> understand what it does and our IP new mgmt app (infoblox) doesn't have a
>> direct way to configure the option, so I'm trying to understand how hard
>> to push them to enable a way to set it.
>>
>> Any help or pointers would be greatly appreciate.  Thx ahead of time
> They're encapsulated options.  For example, an option 175 consisting of:
>
>    175,4,1,1,3,255
>
> would be interpreted as:
>
>    175 - iPXE encapsulated options field
>    4 - total length is 4 bytes
>    1 - sub-option 1 (ipxe.priority)
>    1 - sub-option length is 1 byte
>    3 - value of ipxe.priority is 3
>    255 - end of encapsulated options
>
> See http://ipxe.org/howto/dhcpd#ipxe-specific_options for a current list of
> possible options.
>
> Michael

Mike -
You forgot your usual: gPXE is no longer under development, please 
switch to iPXE which is actively maintained blurb :)

Which, @Roy - You really should switch. When I switched things that were 
broken (which is how I found iPXE, searching for fixes) started working.

Dylan