ipv6 default router Operation not permitted

[Joe Holden]

Just use router solicitation to ask for the link-local gateway, that is 
the "correct" way to do it.

Schrodinger wrote:
> Damien, 
> 
> I appreciate your replies very much, but I'm a subscriber so just reply
> to the mailing list. Thanks.
> 
> On 2013/03/13 14:19, Fleuriot Damien wrote:
> 
> [SNARF]
> 
>>
>> These are indeed correct, thanks for clarifying.
>>
> 
> I thought that's what I said in my first email ;) Sorry for any
> confusion.
> 
>> Find below the config I'm using on an old OVH box.
>> Said config might be outdated now (as per OVH's guide on setting up IPv6 [1]) , however that was at the time the only way to get things working properly.
>>
>> rc.conf
>> ===
>> #Range IPv6: 2001:41D0:2:613b::/64
>> ipv6_enable="YES"
>> ipv6_ifconfig_re0="fe80::21c:c0ff:fef3:31fa/64 scopeid 0x1"
>> ipv6_ifconfig_re0_alias0="2001:41d0:2:613b::dead:beef/56"
>> ipv6_defaultrouter="2001:41d0:2:61ff:ff:ff:ff:ff"
>> ===
>>
> 
> You have /56 and this is what I believe to be the incorrect way to get
> this to Just Work. I think this assume that anyone else in this /56 is
> in the same layer two segment as you.... 
> 
>> routing table
>> ===
> [SNARF]
>> ===
>>
>>
>>
>> Notice that said config actually works:
>> ===
>> $ ping6 www.google.com
>> PING6(56=40+8+8 bytes) 2001:41d0:2:613b::dead:beef --> 2a00:1450:4007:804::1014
>> 16 bytes from 2a00:1450:4007:804::1014, icmp_seq=0 hlim=57 time=4.461 ms
>> 16 bytes from 2a00:1450:4007:804::1014, icmp_seq=1 hlim=57 time=4.462 ms
>> 16 bytes from 2a00:1450:4007:804::1014, icmp_seq=2 hlim=57 time=4.405 ms
>> ^C
>> --- www.google.com ping6 statistics ---
>> 3 packets transmitted, 3 packets received, 0.0% packet loss
>> round-trip min/avg/max/std-dev = 4.405/4.443/4.462/0.027 ms
>> ===
>>
>> Either way, you might want to have a look at OVH's guide [1] but in my own case, using a /56 was, at the time, the only way to get things working in a clean way.
>>
>> [1] http://help.ovh.com/Ipv4Ipv6#link10
>>
> 
> I read this, I made sure to read this and then I read it a second time.
> No where does it indicate the use of a /56. I am in the process of a
> migration from an old OVH server to a new OVH server. My old box uses
> the /56 prefix length "fix" but based on the documentation this is
> incorrect and IMO this assumes that anyone else in the /56 is in the 
> same segment as me and if they are using /64 - well, There Be Dragons.
> 
> Also from the information I have received, router advertisements may be
> turned off in the future, my host should simply Neighbour Solicit for
> the global scope unicast address of my default gateway. And as pointed
> out in previous emails without ACCEPT_RTADV for re0 - FreeBSD does not
> perform this action.
> 
> So again, what is the correct way ? I think this is a debate of IPv6
> Protocol vs. IPv6 Policy vs. Network architecture.
> 
> I'll go and get Tina Turner. You get Masterblaster and we'll meet in
> Thunderdome.
> 
> C.