Comment 4 for bug 1806014

There is a flag IPV6_FORCE_ACCEPT_RA[1] that can be set on an interface to accept_ra's while keeping autoconf (slaac) disabled. I wonder if that's what should be enabled for dhcp interfaces not IPV6_AUTOCONF which also set the autocnf sysctl.

accept_ra - INTEGER
 Accept Router Advertisements; autoconfigure using them.

 It also determines whether or not to transmit Router
 Solicitations. If and only if the functional setting is to
 accept Router Advertisements, Router Solicitations will be
 transmitted.

 Possible values are:
  0 Do not accept Router Advertisements.
  1 Accept Router Advertisements if forwarding is disabled.
  2 Overrule forwarding behaviour. Accept Router Advertisements
    even if forwarding is enabled.

 Functional default: enabled if local forwarding is disabled.
       disabled if local forwarding is enabled.

autoconf - BOOLEAN
 Autoconfigure addresses using Prefix Information in Router
 Advertisements.

 Functional default: enabled if accept_ra_pinfo is enabled.
       disabled if accept_ra_pinfo is disabled.

[1] https://github.com/fedora-sysv/initscripts/commit/28745ca8101b47b8a33213cfc524a4ada742721b