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Bug 1695723 - [NMCI] ipv4_dhcp_client_id_default_rhel7 test fail
Summary: [NMCI] ipv4_dhcp_client_id_default_rhel7 test fail
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: NetworkManager
Version: 7.7
Hardware: Unspecified
OS: Unspecified
Target Milestone: rc
: ---
Assignee: Francesco Giudici
QA Contact: Desktop QE
Depends On:
TreeView+ depends on / blocked
Reported: 2019-04-03 16:56 UTC by Vladimir Benes
Modified: 2019-04-11 11:06 UTC (History)
7 users (show)

Fixed In Version: NetworkManager-1.18.0-0.4.20190408git43d9187c14.el7
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Comment 3 Francesco Giudici 2019-04-03 17:18:40 UTC
In the past, the dhcp client id of NetworkManager *internal* dhcp client was managed by the imported systemd code.
So, the dhcp client id for the *internal* dhcp defaulted to RFC 4361 (IAID + DUID): systemd moreover uses a DUID-EN (duid based on an enterprise number), with the enterprise number assigned by IANA to systemd (00:02:00:00:ab:11).

Now we have added DUID management in NM and we have dropped defaulting to systemd DUID (so a default DUID looks different from the past).
Moreover, we defaulted the dhcp-client-id to the mac address of the interface, following what we used to do with the NM default dhcp client: dhclient.

Not sure we want to go back to defaulting to a systemd specific DUID there, as looks wrong to me. I would say "no".
We can discuss instead if we want to default the dhcp-client-id for internal dhcp to RFC 4361 format. I would have a preference for the "no" here too, but don't care that much.

Consider also that internal dhcp on RHEL-7 is NOT the default and that the default one (dhclient) uses MAC addresses.

Please, share your opinions.

Comment 4 Thomas Haller 2019-04-05 10:34:13 UTC
> Please, share your opinions.

RHEL-7 must stick to the old default, requiring a downstream patch to revert the change.

Comment 5 Vladimir Benes 2019-04-05 12:01:01 UTC
(In reply to Thomas Haller from comment #4)
> > Please, share your opinions.
> RHEL-7 must stick to the old default, requiring a downstream patch to revert
> the change.

I strongly agree here. Behavior changes are often reported by customers back shortly after we do them.

Comment 6 Francesco Giudici 2019-04-09 13:22:04 UTC
Pushed a downstream patch to RHEL-7.7 NetworkManager repo to preserve the dhcp-client-id default for internal dhcp client.

Comment 8 Vladimir Benes 2019-04-11 11:06:43 UTC
working rhel7ish again

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