6bone to 6to4

[Kristoff Bonne]

Greetings,

On Mon, 22 Jan 2001, Kurt D. Zeilenga wrote:
>> Besides 6bone (BGP) connectivity, I am also playing with the 6to4
>> encapsulation.
>> I my router has IP-address 195.13.17.26, I use the block of
IP-addresses 
>> 2002:C30D:111A/48. (which should be correct).
>> I also set up a static route at my router, that routes traffic to
>> 2002::/16 to the 6-to-4 tunnel. (The rest used the routing-info that is
>> received via BGP4+).

>> This seams to work for hosts that have a IPv6-address in my
>> 6bone-range (for all traffic), but a hosts that only has a 6to4-type
>> address can only reach other hosts that have a 6to4 address.
> Do they have a route to the 6BONE?
Yep.
This is my config:
- A cisco router (25xx) which both BGP 4+ to belnet (and from-there-on the
6bone) and a 6to4-interface. (I used to config posted by Erik Rietberg in
this list earlier this week).
- Routing static route for 2002::/16 to tunnel1 (6to4). For the rest, it
'falls back' to the BGP 4+ routing.
- On the LAN-interface, both the 6bone address-range and 2002-range. Only
the 6bone-range (and site-local) is announced via RP.
- On the lan: one linux-box (which has a 6bone-address learned via RP from
the router) and one OpenBSD-box with a 2002-address (configured
statically) and default gateway set statiscally to router (link-local
address).

Result:
- linux-box (hence, 6bone-address) can reach everything.
A ping6 to a remote 2002-address (e.g. ipv6-router.cisco.com or
6to4.ipv6.microsoft.com) is now faster then before. (which proves that the
shortcut for the 2002-address static-route is used).
- OpenBSD-box (hence, 2002-address) can reach the other 2002-addresses,
but not the 6bone-addresses.

To me, it looks like the 6bone-hosts don't know the return-path to my
2002-address.

As a test, I've also added my 2002-addresses in my BGP-4+ announcements,
and now I can reach SOME 6bone-addresses (like www.6bone.net and
www.ipv6.surfnet.nl), but others do not reply (like www.belnet.be or
www.kame.net).

Is it possible there any some filters somewhere on the BGP-4+
announcements? Can anybody check their B GP 4+ routing-table for AS6774?


What I found strange that (in my BGP4+ routing-table) I did found the
follwing entry:
*> 2002::/16        3FFE:608:2:2::10           0 2611 3257 4697 1251 109 i

So, there DOES is a 'universal' 6bone to 6to4 gateway???


Cheerio! Kr. Bonne.
-- 
KB905-RIPE                                       Belgacom  IP networking
(c=be,a=rtt,p=belgacomgroup,s=Bonne,g=Kristoff)  Internet, IP and IP/VPN
kristoff.bonne@skypro.be                         Faxbox :  +32 2 2435122