From: Andy Hogard (andyhogard@gmail.com)
Date: Tue Feb 10 2009 - 17:31:20 ARST
Pavel,
I have noticed that none of those adjustments were required. Although my
tunnel was between just a single hop of v4 network ..have you experienced
anything otherwise and thus recommended a change or was it more of your gutt
feeling ?!
Better to know about any ttl modifications that are required. :)
Andy.
On Fri, Feb 6, 2009 at 2:20 PM, Pavel Bykov <slidersv@gmail.com> wrote:
> Logically, there might be a problem with multicast helloes due to how 6to4
> works.
> 1. It's multicast, therefore there will be problem of replicating packets
> to
> destinations, since 6to4 is multipoint
> 2. The TTL is 1. As all addresses from 224.0.0.x range, OSPF's multicast
> address has TTL of 1 as well. This does not have to be a problem, but it
> could be due to how packets are going to be encapsulated and traveling
> inside the system
>
> Id's say manual "neighbor" statements are a much safer bet, with TTL of 2
> and unicast the theoretical problems go away.
>
>
> On Thu, Feb 5, 2009 at 10:03 PM, Roger RPF <rpf@bluemail.ch> wrote:
>
> > What exactly is the problem? Can you be more specific.
> >
> > Well, here just an example how to configure it on one router:
> >
> > int tunnel 0
> > tunnel source lo0
> > ipv6 address 2002:aabb:ccdd::1/64
> > tunnel mode ipv6ip 6 to 4
> > ipv6 ospf 1 area 0
> >
> > ipv6 route 2002::/16 tunnel 0
> >
> > -->> Note, the aa bb part above is the converted (into hex) ipv4 address
> of
> > the lo0
> >
> >
> > int lo0
> > ip address aa.bb.cc.dd 255.255.255.255
> > ipv6 ena
> > ipv6 ospf 1 area 0
> >
> > If you do this concept on a few other routers you should be able to ping
> > the
> > addresses...
> >
> > Test it out..hopefully I havent done a typo in the config...smile...
> >
> > regards
> >
> > Roger
> >
> > -----Urspr|ngliche Nachricht-----
> > Von: nobody@groupstudy.com [mailto:nobody@groupstudy.com] Im Auftrag von
> S
> > Malik
> > Gesendet: Donnerstag, 5. Februar 2009 19:06
> > An: Cisco certification
> > Betreff: IPV6: OSPF Routing over 6to4 Tunnel
> >
> > Can we do ospfv3 routing over 6to4 tunnel?
> >
> > I would appreciate if some one can forward working configuration please.
> >
> >
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> >
>
>
> --
> Pavel Bykov
> ----------------
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