[syslinux] Consistent but intermittent DHCP problems after pxelinux loads kernel.

[Eli Stair]

Thanks for the input.  The vendor and manufacturer are addressing it now 
(yes with a PXE code update).

And thanks for the friendly reminder of the FAQ which I, err, forgot to 
check.  It is actually dhcpcd that's failing, not even the IP-Config in 
kernel.

Cheers,

/eli

Geert Stappers wrote:
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> On Fri, Nov 18, 2005 at 01:33:31PM -0800, Eli Stair wrote:
> 
>    <snip/> 
> 
>>The systems are showing one very improper behaviour:
>>
>>Some significant portion of the time the DHCP OFFER is never REQUEST'ed, 
>>but DISC's and OFFERs keep flowing until it times out.  I've got packet 
>>captures of both successful and unsuccessful runs, with no difference in 
>>the decode results.  On failure, the client keeps requesting and 
>>ignoring the immediate offer that should be accepted is blindly ignored, 
>>and the 4- 8- 16- second retry is stepped through while the OFFER 
>>immediately comes through.
>>
>>Looking at packet caps via a hub shared with the client, compared with 
>>the server logs shows nothing amiss.  This same exact image is 
>>successfully used to network install hardware from another vendor, as 
>>well as from a boot CD this same HP hardware.  The problem seems to 
>>recurr randomly, sometimes lasting a minute or two, sometimes hours.
>>
>>Has anyone seen this or a similar issue on any configuration?  Any 
>>suggestions of something further I could try?  Thanks for any input.
> 
> 
> To me it seems the receive part does work.
>  (possible causes: driver isn't aware of register change,
>   interrupt isn't actived or misconfigured )
> 
> 
> IIUC, it is the booting kernel DHCP code that fails.
> 
> To avoid DHCP in the early phase of start-up,
> try IPAPPEND ( http://syslinux.zytor.com/faq.php )
> 
> 
> GSt
> 
> P.S.
> 
> If it works, then contact me off-list for shipping an optron to me.
> (I assume(hope?) that hpa has allready been rewarded by those
> who use to software he wrote)
> 
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