Re: IPv6 automatic 6-to4 tunnel

well spotted, got a bit eager about time, so the translation slipped the
gaps.

Ryan has a point, should have kept it simple.

Thanks :)

On Wed, Apr 8, 2009 at 7:03 PM, Bryan Bartik <bbartik_at_ipexpert.com> wrote:

> Agreed, also if you are doing to auto 6to4, you will also need routes with
> embedded ipv4 addresses as the next hops.
>
> R4:
> ipv6 route 2001:6::/64 2002:606:606::1 <---6.6.6.6 embedded in next hop
>
> R6:
> ipv6 route 2001:4::/64 2002:404:404::1 <---4.4.4.4 embedded in next hop
>
> This is assuming you want connectivity between the Loopback6 interfaces.
> But like Ryan said, I don't think auto 6to4 is a requirement. Just seems you
> need P2P connectivity.
>
> Bryan Bartik
> CCIE #23707, CCNP
> Sr. Support Engineer - IPexpert, Inc.
> URL: http://www.IPexpert.com <http://www.ipexpert.com/>
>
>
> On Wed, Apr 8, 2009 at 10:51 AM, Larry <cc13lab_at_gmail.com> wrote:
>
>> your ipv6 addresses are wrong, go back and verify that they are correctly
>> converted....
>>
>>
>>
>> On Wed, Apr 8, 2009 at 12:39 PM, Ryan West <rwest_at_zyedge.com> wrote:
>>
>> > Ruhann,
>> >
>> > Pretty sure you just need ipv6ip tunnels in this case. Also, where are
>> the
>> > RIP commands on the loopback interfaces.
>> >
>> > -ryan
>> >
>> > -----Original Message-----
>> > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
>> > Ruhann
>> > Sent: Wednesday, April 08, 2009 12:26 PM
>> > To: CCIE R/S, Groupstudy
>> > Subject: IPv6 automatic 6-to4 tunnel
>> >
>> > Hi again
>> >
>> > I could not get this working today, in my mock.
>> > The question was vague, but the only possibility I saw was automatic
>> 6-to4
>> > tunnel.
>> > The requirement was to establish IPv6 connectivty between R4 and R6
>> > loopback6 interfaces,
>> > maintaining reachability when network failure, while not installing ipv6
>> on
>> > any of the router in between.
>> >
>> >
>> > My config was as follow:
>> > ---snip---
>> > R4#sh run | s Tunnel|Loopback1|ipv6 route|unicast
>> > ipv6 unicast-routing
>> > interface Tunnel1
>> > no ip address
>> > no ip redirects
>> > ipv6 address 2002:44:44::4/64
>> > ipv6 rip TAG enable
>> > tunnel source Loopback1
>> > tunnel mode ipv6ip 6to4
>> >
>> > interface Loopback1
>> > ip address 4.4.4.4 255.255.255.255
>> > interface Loopback6
>> > ipv6 add 2001:4::4/64
>> >
>> > ipv6 route 2002::/16 Tunnel1
>> >
>> >
>> > R6#sh run | s Tunnel|Loopback1|ipv6 route|unicast
>> > ipv6 unicast-routing
>> > interface Tunnel1
>> > no ip address
>> > no ip redirects
>> > ipv6 address 2002:66:66::6/64
>> > ipv6 rip TAG enable
>> > tunnel source Loopback1
>> > tunnel mode ipv6ip 6to4
>> >
>> > interface Loopback1
>> > ip address 6.6.6.6 255.255.255.255
>> >
>> > interface Loopback6
>> > ipv6 add 2001:6::6/64
>> > ipv6 route 2002::/16 Tunnel1
>> > ---snip---
>> >
>> >
>> > I had reachability between R4 and R6 Lo1 interfaces, but could not get
>> > reachability through the tunnels.
>> >
>> > Please advise if you can spot something I did wrong,
>> > Thanks
>> > --
>> > <ruhann>
>> >
>> >
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>>
>>
>>
>
>
> --
> Bryan Bartik
> CCIE #23707, CCNP
> Sr. Support Engineer - IPexpert, Inc.
> URL: http://www.IPexpert.com <http://www.ipexpert.com/>
>

-- 
<ruhann>
Blogs and organic groups at http://www.ccie.net