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Re: UEFI-PXE boot to grub2 with BIOS configured VLAN tagging?

From: Christian Rohmann
Subject: Re: UEFI-PXE boot to grub2 with BIOS configured VLAN tagging?
Date: Mon, 9 Jan 2017 11:16:22 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1

Hey Andrei, help-grub,

On 01/06/17 17:12, Andrei Borzenkov wrote:
The latter. There were patches to add tagged VLAN support (and they are
used by vendors, e.g. SUSE). Not sure what happens in case of netboot
though ... no, it adds core network support and ofnet driver support. No
UEFI patches.

I am not sure how we should proceed with auto-configuration either. It
does not look like PXE_BASE_CODE_MODE structure contains information
about VLAN. So we probably need to somehow query interface. Someone
having such configuration is welcomed to provide patches :)

ofnet is easier because we get this information directly from firmware.
On UEFI someone needs to find out how to get this information.

Yeah, looking at it does not seems to contain any VLAN info for EFI boot as well.

I am just wondering if the VLAN defined prior to booting (i.e. via the UEFI-BIOS) is transparent to the software doing the network boot and the NIC simply tags all frames. iPXE does have VLAN support though, so somehow configuration of VLANs is possible, see .



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