[bugs #9245] ARP or unsolicited UDP traffic stops the GRUB TFTP download

[Gilles van Ruymbeke]

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 of the project: GNU GRUB.




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[bugs #9245] Full Item Snapshot:

URL: <http://savannah.gnu.org/bugs/?func=detailitem&item_id=9245>
Project: GNU GRUB
Submitted by: Gilles van Ruymbeke
On: Sun 06/06/2004 at 22:12

Category:  Network
Severity:  Major
Priority:  5 - Normal
Item Group:  Software Error
Resolution:  None
Assigned to:  None
Originator Name:  ruymbeke
Originator Email:  gvr_grub_bug123--AT--ruymeke--DOT--com
Status:  Open
Release:  0.94
Reproducibility:  Every Time
Planned Release:  


Summary:  ARP or unsolicited UDP traffic stops the GRUB TFTP download

Original Submission:  When using Grub to Net Boot Cluster Knoppix 3.4 via a 
RTL8169, grub hangs if it receives ARP or unsolicited UDP traffic before 
starting any TFTP download (kernel or cfg file).
I compiled the latest CVS Grub (June 5th 2004) patched with the diskless pack 3.
I can systematically reproduce this after resetting and net grub rebooting one 
of the machine previously active on the network used by a Knoppix cluster of at 
least 2 computers. AS info, the machines of the cluster knoppix exchange UDP 
info every seconds and continue trying to do so after the reset of the computer 
which prevents grub to net reboot via tftp even though the DHCP transaction is 
ok.
Grub works fine if no traffic hits grub before the tftp download (tcpdump), by 
disconnecting the 2nd cluster knoppix computer before grub starts on the first 
computer.
I don't know if this is tight to the RTL8169 only or if this is a general 
problem with all network card adapters yet. More info later...
Hope this will help the Grub development and debug, Gilles.



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