From: srdja blagojevic (srdja1@pexim.co.yu)
Date: Mon Jul 10 2006 - 03:26:28 ART
Bob,
shouldn't 6to4 addresses start with 2002::/16 prefix (according to CCO)?
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/ipv6
_c/sa_tunv6.htm#wp1037465
Rgds,
Srdja
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Bob
Sinclair
Sent: Monday, July 10, 2006 02:19
To: Sami
Cc: ccielab@groupstudy.com
Subject: Re: RIPng over IPv6 6to4 tunnel
Sami,
If by "multiple sites" you will accept 2, here are working configs for
automatic 6to4 tunnels. One of the beauties of this technique is that if
you can get it to work with 2 nodes, 3 or more is no different.
R1:
interface Tunnel2134
no ip address
no ip redirects
ipv6 address 2134:AC10:7C01::1/16
tunnel source Serial0/0.124
tunnel mode ipv6ip 6to4
interface Serial0/0.124 multipoint
ip address 172.16.124.1 255.255.255.0
frame-relay map ip 172.16.124.1 102
frame-relay map ip 172.16.124.2 102 broadcast frame-relay map ip
172.16.124.4 104 broadcast no frame-relay inverse-arp
R4:
interface Tunnel2134
no ip address
no ip redirects
ipv6 address 2134:AC10:7C04::4/16
tunnel source Serial0/0.124
tunnel mode ipv6ip 6to4
interface Serial0/0.124 multipoint
ip address 172.16.124.4 255.255.255.0
frame-relay map ip 172.16.124.1 401 broadcast frame-relay map ip
172.16.124.2 401 frame-relay map ip 172.16.124.4 401 no frame-relay
inverse-arp
Note that the ipv6 address of the local tunnel includes the IPv4 address of
the tunnel source.
The Tunnel endpoint is chosen dynamically. So if R1 has a packet with an
IPV6 next hop of 2134:AC10:7C04::4, then R1 will convert the 32 bits after
2134 to dotted decimal and will create the tunnel to the resulting IPv4
endpoint. I have not seen this work with RIPng as the routing protocol,
only with static and BGP.
HTH,
Bob Sinclair
CCIE #10427, CCSI 30427
www.netmasterclass.net
----- Original Message -----
From: Sami
To: srdja blagojevic
Cc: apaterra@alumni.cmu.edu ; rofernandez@us.telefonica.com ;
ccielab@groupstudy.com
Sent: Sunday, July 09, 2006 6:11 PM
Subject: Re: RIPng over IPv6 6to4 tunnel
Could some one paste configuration of a working 6to 4 Auto tunnel with
multiple sites. I am confused how you map ipv4 address automatically in
IPv6
address
Thanks
On 7/9/06, srdja blagojevic <srdja1@pexim.co.yu> wrote:
>
> Roberto, Tony,
>
> Thank you for your responses! I could not find anything like neighbor
> statement for RIPng, so I thought that I was missing something here.
>
> Rgds,
> Srdja
> -----Original Message-----
> From: Tony Paterra [mailto:apaterra@gmail.com]
> Sent: Sunday, July 09, 2006 02:20
> To: srdja blagojevic
> Cc: ccielab@groupstudy.com
> Subject: Re: RIPng over IPv6 6to4 tunnel
>
> Srdja,
> Interesting problem... From you've mentioned I think you already have
the
> answer... 6to4 tunnels require that they start with a 2002::/16 address
> with the IPv4 address embedded in the suffix (so it can determing the
IPv4
> tunnel destination). With RIPng multicasting it's updates out to
> neighbors
> this won't automatically create the tunnels.
>
> Something to try would be to see if RIPng supports unicast
advertisements
> (similar to the neighbor statement in EIGRP or RIP for IPv4).
>
> From my experience, all the 6to4 examples I've seen use static routing
for
> the 2002::/16 address space out the tunnel interface.
>
> On 7/8/06, srdja blagojevic <srdja1@pexim.co.yu> wrote:
> > Group,
> >
> > Is it possible to run RIPng over 6to4 tunnel?
> >
> > RIPng is working fine over Manual and GRE/IP tunnel, but I can not
> > make it work over 6to4 tunnel. Tunnel itself is fine (I can ping from
> > one end to another). Only difference (from manual and gre/ip), that I
> > can see, is that
> > 6to4 tunnel is point to multipoint (and not piont to point) by its
> > nature, so there is no destination address in which musticast RIPng
> > packets can be encapsulated. As I understood, communication between
> > tunnel endpionts is over IPV4 infrastructure, and only addresses that
> > have format
> > 2002:IPV4-address::/48 can be found through 6to4 tunnel interface. Is
> > this mean that RIPng packet destinated to FF02::9 address can not be
> > send over
> > 6to4 tunnel because we do not know to which tunel destination (IPv4
> > address) we have to send it?
> >
> > Did anyone else try this before? Am I missing something here?
> >
> > rgds,
> > srdja
> >
> > ______________________________________________________________________
> > _ Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
> >
>
>
> --
> Tony Paterra
> apaterra@gmail.com
>
> _______________________________________________________________________
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