Comment # 14 on bug 916956 from Marius Tomaschewski

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

    FW_BOOT_FULL_INIT="yes"

in /etc/sysconfig/SuSEfirewall2
(at least in SuSEfirewall2-3.6.312-3.3.noarch on leap-41.1).