Bug 828914

Summary: Network Manager - support for DHCP6 and Autoconf
Product: [Fedora] Fedora Reporter: William Brown <william>
Component: NetworkManagerAssignee: Dan Williams <dcbw>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: low Docs Contact:
Priority: unspecified    
Version: 17CC: danw, dcbw, psimerda, william
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Last Closed: 2012-08-29 10:15:48 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description William Brown 2012-06-05 15:07:55 UTC 
Description of problem:

Network manager for IPv6 configurations offers the support for "Automatic", "Automatic, Addresses only" and "Automatic, DHCP only". When DHCP only is selected routes to the internet are lost, and autoconf is disabled. A global address is leased from DHCP6 only.

DHCP6 does not provide internet routes (For example, the option to serve an ipv6 router does not exist in the isc-dhcp4 daemon), as this is the duty of RADVD. Thus, for sucessful network operation, both DHCP6 and autoconf are required. 

Network manager should support both DHCP6 and autoconf on the same ethernet device, rather than disabling autoconf when DHCP6 is selected.
Comment 1 Pavel Šimerda (pavlix) 2012-08-29 10:15:48 UTC 
> DHCP6 does not provide internet routes (For example, the option to serve an
> ipv6 router does not exist in the isc-dhcp4 daemon), as this is the duty of
> RADVD. Thus, for sucessful network operation, both DHCP6 and autoconf are
> required. 

Not autoconf but router advertisement, to be precise.

> Network manager should support both DHCP6 and autoconf on the same ethernet
> device, rather than disabling autoconf when DHCP6 is selected.

I filed a bug report to remove 'DHCP only'. We have been talking about it for
long time so it's time to document in bugzilla:

https://bugzilla.gnome.org/show_bug.cgi?id=682932

> Network manager should support both DHCP6 and autoconf on the same ethernet
> device, rather than disabling autoconf when DHCP6 is selected.

Use the default 'method=auto'.

Any other concerns?