On 03/07/18 07:04, Chris Caudle wrote:
> Could be the case that AUTOCONF and DHCPv6 are mutually exclusive now.
> I have a CentOS 7.4 machine which seems to be running correctly with both 
> IPV6_AUTOCONF=yes and DHCPV6C=yes, but that distribution has dhclient 
> provided by dhclient-4.2.5-58.el7.centos.1 and Fedora 27 is using rhclient 
> from dhcp-client-4.3.6-9.fc27.  Could be changed behavior between 4.2 and 4.3 
> of dhclient.
> Against that hypothesis is that the dhclient did log that it was requesting 
> on the second interface, which has the same settings in the ifcfg file.  I'll 
> try some different settings tonight.  I'm pretty sure that the current 
> version of the file was hand edited, I have used nmcli and nmtui in the past.
> I just edited the connection with nmtui and it did use only the autoconf 
> directive, not the dhcp, so I will see if that worked.  It did not just from 
> restarting NetworkManager, I will have to try later bringing the interface 
> down all the way and restarting.  I am connected over that network via ssh 
> currently so I can't easily shut it down.

FWIW, I manually added DHCPV6C=yes to a config file on a VM.  As I mentioned, my
router can only support one address assignment method at a time and it is 
for "stateless".

With that said, the only message that appears in the journal is...

Mar 07 11:02:24 f27k.greshko.com NetworkManager[811]: <info>  [1520391744.1479]
dhcp-init: Using DHCP client 'dhclient'

There is no indication from the status of NetworkManager that /sbin/dhclient 
was ever
started and it isn't running.

So, if your router is configured for "stateful (dhcp)" it is possible it won't
simultaneously support "stateless".  Therefore I would try...


If simple questions can be answered with a simple google query then why are 
there so
many of them?

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