Bug 1917746

Summary:	[RFE] Need for net_default_interface and net_default_mac vars in EFI mode
Product:	Red Hat Enterprise Linux 8	Reporter:	Christophe Besson <cbesson>
Component:	grub2	Assignee:	Bootloader engineering team <bootloader-eng-team>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Release Test Team <release-test-team>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	8.3	CC:	raravind
Target Milestone:	rc	Keywords:	FutureFeature
Target Release:	8.0
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-07-25 12:18:19 UTC	Type:	Feature Request
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Christophe Besson 2021-01-19 10:19:20 UTC

Description of problem:
Previously, customer used PXElinux/syslinux for netbooting with BIOS FW, and used the "IPAPPEND 2" directive in order to add BOOTIF=@MAC into the cmdline.

With UEFI and Grub2, they can append BOOTIF=$net_efinet0_mac, but this is not as dynamic as for the BIOS, since it won't work if the netboot happens on the 2nd interface. If I didn't miss an alternative, could it be feasible to implement some vars available in BIOS mode like $net_default_interface and $net_default_mac with the UEFI FW network functions?

Version-Release number of selected component (if applicable):
grub2-efi-x64-2.02-90.el8.x86_64

How reproducible:
100% in the customer env.

Comment 1 raravind 2023-05-17 12:11:28 UTC

Christophe,

For RHEL 8, the current guidance is to minimize new features as we are winding down development for that release: https://lists.corp.redhat.com/archives/rhel-announce/2023-February/000071.html 
If this is something adequately supported by RHEL 9's grub, our recommendation would be to use RHEL 9.