Comment 9 for bug 1808647

absolutely! the behavior is identical whether `IPV6_AUTOCONF=yes` is in /etc/sysconfig/networking or if the line is totally omitted (presumably because IPV6FORWARDING is not set to "yes"?)

I ran the same commands as comment #7 and the only one that had any different output was the route table, particularly the last line:

```
[root@ip-172-31-40-118 ~]# ip -6 route show
unreachable ::/96 dev lo metric 1024 error -113 pref medium
unreachable ::ffff:0.0.0.0/96 dev lo metric 1024 error -113 pref medium
unreachable 2002:a00::/24 dev lo metric 1024 error -113 pref medium
unreachable 2002:7f00::/24 dev lo metric 1024 error -113 pref medium
unreachable 2002:a9fe::/32 dev lo metric 1024 error -113 pref medium
unreachable 2002:ac10::/28 dev lo metric 1024 error -113 pref medium
unreachable 2002:c0a8::/32 dev lo metric 1024 error -113 pref medium
unreachable 2002:e000::/19 dev lo metric 1024 error -113 pref medium
2600:1f14:589:f01::/64 dev ens5 proto kernel metric 256 pref medium
unreachable 3ffe:ffff::/32 dev lo metric 1024 error -113 pref medium
fe80::/64 dev ens5 proto kernel metric 256 mtu 9001 pref medium
default via fe80::41c:cff:fe68:6810 dev ens5 proto ra metric 1024 expires 1798sec hoplimit 64 pref medium
```

Now the device is learning the default gw via ra (Router Advertisement) because the script /etc/sysconfig/network-scripts/ifup-ipv6

is doing:
```
# Set some proc switches depending on defines
if [ "$IPV6FORWARDING" = "yes" ]; then
    # Global forwarding should be enabled

    # Check, if global IPv6 forwarding was already set by global script
    if [ $ipv6_global_forwarding_current -ne 1 ]; then
        net_log $"Global IPv6 forwarding is enabled in configuration, but not currently enabled in kernel"
        net_log $"Please restart network with '/sbin/service network restart'"
    fi

    ipv6_local_forwarding=1
    ipv6_local_auto=0
    ipv6_local_accept_ra=0
    if [ "$IPV6_ROUTER" = "no" ]; then
        ipv6_local_forwarding=0
    fi
    if [ "$IPV6_AUTOCONF" = "yes" ]; then
        ipv6_local_auto=1
        ipv6_local_accept_ra=2
    fi
else
    # Global forwarding should be disabled

    # Check, if global IPv6 forwarding was already set by global script
    if [ $ipv6_global_forwarding_current -ne 0 ]; then
        net_log $"Global IPv6 forwarding is disabled in configuration, but not currently disabled in kernel"
        net_log $"Please restart network with '/sbin/service network restart'"
    fi

    ipv6_local_forwarding=0
    ipv6_local_auto=1
    ipv6_local_accept_ra=1
    if [ "$IPV6_AUTOCONF" = "no" ]; then
        ipv6_local_auto=0
        if [ ! "$IPV6_FORCE_ACCEPT_RA" = "yes" ]; then
            ipv6_local_accept_ra=0
        fi
    fi
fi

if [ ! "$IPV6_SET_SYSCTLS" = "no" ]; then
    /sbin/sysctl -e -w net.ipv6.conf.$SYSCTLDEVICE.forwarding=$ipv6_local_forwarding >/dev/null 2>&1
    /sbin/sysctl -e -w net.ipv6.conf.$SYSCTLDEVICE.accept_ra=$ipv6_local_accept_ra >/dev/null 2>&1
    /sbin/sysctl -e -w net.ipv6.conf.$SYSCTLDEVICE.accept_redirects=$ipv6_local_auto >/dev/null 2>&1
    /sbin/sysctl -e -w net.ipv6.conf.$SYSCTLDEVICE.autoconf=$ipv6_local_auto >/dev/null 2>&1
fi
```