[gPXE] How to modify the code can not get DHCP information on the2nd

[Gene Cumm]

2010/11/6 sqwbwh <sqwbwh at 126.com>:
> Miller, Shao
> use Embedded script
> "
> #!gpxe
> set use-cached 1
> "
> GPXE not have access to 017 settings
> How can either use the set use-cached 1
> Also get 017 information?

Your native PXE client probably did not request it and/or ignored it
when storing the cached DHCP packets.  If you do a packet capture
(very easy in a hosted VMware environment), I'd guess you probably
won't see option 17 in the response from the server.  It is possible
to configure some DHCP servers to always return certain options.

However, when you don't "set use-cached 1", the DHCP server is
probably sending it because gPXE is probably requesting it.

> info:
> ------------
> Dhcp server set up in the 017 options iscsi: 192.168.0.222:: 3260:: test
> ------------
>   I set it in an embedded script:
> #!gpxe
> set use-cached 1
> autoboot
> please see 0171.jpg
> -0172.jpg root-path is nothing
>  0172.jpg is add script :
> #!gpxe
> set use-cached 1
> config
> -
> normal.jpg is no script
>
>
>
> At 2010-11-05 21:13:33，"Miller, Shao" <shao.miller at yrdsb.edu.on.ca> wrote:
>
>>________________________________________
>>From: gpxe-bounces at etherboot.org [mailto:gpxe-bounces at etherboot.org] On Behalf Of sqwbwh
>>Sent: Friday, November 05, 2010 09:05
>>To: GPXE Mailing List
>>Subject: [gPXE] How to modify the code can not get DHCP information on the2nd
>>
>>
>>How to modify the code can not get DHCP information on the 2nd?(GPXE only used to boot the system from ISCSI)
>>Is to remove this step.
>>net0: 00:0 c:: 29:08:11:35 on UNDI-PCI02: 01.0 (OPEN)
>>  [Link: up, TX: 0 TXE: 0 TX: 0 rxe: 0]
>>DHCP (net0 00:0 c: 29:08:11: d5 ).... ok
>>net0: 192.168.0.202/255.255.255.0
>>
>>This can speed up boot speed.
>>Normal GPXE run to start from the boot system tftp process takes about 8 seconds or so
>>If removed from the second time for DHCP information will only need a very quick 2.5 seconds.
>>
>>-----
>>
>>You most likely want the 'use-cached' option.  It is DHCP gPXE encapsulated option number 178.  Or, you can set it in an embedded script:
>>
>>  #!gpxe
>>  set use-cached 1
>>  autoboot
>>
>>- Shao Miller

-- 
-Gene