URL:
<https://savannah.gnu.org/bugs/?61364>
Summary: (EFI) network problems when netbooting iPXE from
netbooted GRUB
Project: GNU GRUB
Submitted by: boringname
Submitted on: Thu 21 Oct 2021 12:49:46 PM UTC
Category: Network
Severity: Major
Priority: 5 - Normal
Item Group: Software Error
Status: None
Privacy: Public
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Release:
Release: Git master
Discussion Lock: Any
Reproducibility: Every Time
Planned Release: None
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Details:
Hi,
in my setup I have an EFI GRUB which can be booted from a client machine with
the network card's PXE ROM. This works just fine and from there on I'm trying
to chainload iPXE from this netbooted GRUB.
However, at this point I am getting problems. The chainloaded iPXE instance
for some reason can no longer use the machine's network card (not listed at
all or freezes on initialization) which renders the iPXE instance useless (see
the linked iPXE issue for details). This probem does not occur when I omit
GRUB from the boot chain (when I boot iPXE from the internal PXE ROM
directly).
Here are a few examples which DO work:
PXE-ROM (local) -> iPXE (from tftp)
GRUB (local) -> iPXE (local) -> iPXE (from tftp)
Here are a few examples which DO NOT work:
PXE-ROM (local) -> GRUB (from tftp) -> iPXE (from tftp)
GRUB (local) -> iPXE (local) -> GRUB (from tftp) -> iPXE (from tftp)
I've previously asked the iPXE folks if that would be a problem with iPXE and
they suggested that this may be a problem with GRUB because there are no
problems when eliminating the netbooted GRUB from the boot chain. Here is a
link to that discussion:
https://github.com/ipxe/ipxe/issues/492
I don't have much knowledge about the internals of either iPXE or GRUB, but
from what was being mentioned perhaps GRUB leaves the network card in an odd
state when chainloading iPXE which causes the iPXE malfunction.
Here is some more info about the setup:
TFTP Server: in.tftpd
Network Card: 00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet
Connection (7) I219-V [8086:15bc] (rev 10)
GRUB versions: Problem reproduced with 2.02, 2.04 and the latest Git master
(couple days ago)
How can this problem be resolved and is there any information that I can
provide to make this easier?
_______________________________________________________
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<https://savannah.gnu.org/bugs/?61364>
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