Bug 2212357 - [RFE] networkd: Support DHCP option ipv6-only (RFC 8925)
Summary: [RFE] networkd: Support DHCP option ipv6-only (RFC 8925)
Keywords:
Status: CLOSED RAWHIDE
Alias: None
Product: Fedora
Classification: Fedora
Component: systemd
Version: rawhide
Hardware: Unspecified
OS: Linux
unspecified
low
Target Milestone: ---
Assignee: systemd-maint
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: ipv6-mostly
TreeView+ depends on / blocked
 
Reported: 2023-06-05 12:13 UTC by Petr Menšík
Modified: 2023-12-06 19:42 UTC (History)
10 users (show)

Fixed In Version: systemd-255~rc4-3.fc40
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2023-12-01 10:58:42 UTC
Type: ---
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Github systemd systemd issues 23674 0 None open 464XLAT support 2023-12-06 19:41:41 UTC
Github systemd systemd issues 24624 0 None open Please support RFC 8925 IPv6-Only Preferred Option for DHCPv4 (Option 108) 2023-12-06 19:41:31 UTC
Github systemd systemd pull 29472 0 None Merged network/dhcp: add IPv6 only mode support 2023-12-06 19:42:46 UTC

Description Petr Menšík 2023-06-05 12:13:32 UTC 
Network can signal it can support IPv4, but requests all prepared systems to use only IPv6 addresses. That can be interesting especially where no IPv4 NAT is done and hosts get assigned public addresses.

Reproducible: Always

Steps to Reproduce:
1. DHCP server offers ipv6-only extension
2. Connect to such network
3. IPv4 address should not be allocated, even if the network provides DHCPv4


Reproducible: Always




There is upstream issue requesting 464xlat support:
https://github.com/systemd/systemd/issues/23674

But DHCP ipv6-only option support is not mentioned there
Comment 1 Petr Menšík 2023-06-05 12:16:20 UTC 
Ah, found exact upstream request:
https://github.com/systemd/systemd/issues/24624
Comment 2 Zbigniew Jędrzejewski-Szmek 2023-12-01 10:58:42 UTC 
RFC 8925 was implemented in https://github.com/systemd/systemd/pull/29063,
which is in systemd-255-rc1.
Comment 3 Petr Menšík 2023-12-06 19:42:46 UTC 
PR is actually RC4: https://github.com/systemd/systemd/pull/29472
Included in: https://bodhi.fedoraproject.org/updates/FEDORA-2023-4ad8a2e237

But fixed anyway, thank you!
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