Comment # 13 on bug 933590 from Marius Tomaschewski

Yes, bug 934067 is the SLES-12 bug report I've opened to fix the kernel to
emit NEWLINK events when "Reachable Time" and "Retrans Timer" are 0 in RA:
"A value of zero means unspecified (by this router)", and "In such cases,
the parameter should be ignored and the host should continue using whatever
value it is already using" as stated in rfc4861 4.2/6.3.4, that is not a
reason to skip anything, just nothing special provided/enforced by the
router as briefly also described in comment 7.

Not emitting them caused, that DHCPv6 started to request address/info late
and does not has anything to do with the routes, which were set -- except,
SUSEfirewall2 blocks the RA (in it's init phase).

Sorry, better would be to link the info here.

The kernel patches are here:
  http://patchwork.ozlabs.org/patch/512486/
  http://patchwork.ozlabs.org/patch/512646/
and accepted upstream.

Workaround to not break IPv6 RA, ... is setting:

    FW_BOOT_FULL_INIT="yes"

in /etc/sysconfig/SuSEfirewall2.