From: Arden Packeer (contactme@ardenpackeer.com)
Date: Tue Jul 15 2008 - 20:11:28 ART
Igor,
I wrote up some tutorials for my students on IPv6 tunnels that might help:
Manual GRE & IPv6IP Tunnels:
http://ardenpackeer.com/routing-protocols/tutorial-ipv6-tunnels-part-1-manual-gre-ipv6ip-tunnels/
Automatic 6to4 Tunnels:
http://ardenpackeer.com/routing-protocols/tutorial-ipv6-tunnels-part-2-automatic-6to4-tunnels/
Hope they help!
On 7/16/08, Petr Lapukhov <petr@internetworkexpert.com> wrote:
> GRE was originally designed as multiprotocol encapsulation. Therefore, it
> can carry IPv6, IPv4, IPX (you name it) etc on the same tunnel, e.g.
> interface Tunnel0
> ip address 23.23.23.3 255.255.255.0
> ipv6 address 2001::3/64
> ipx network 100
> tunnel source Loopback0
> tunnel destination 150.1.2.2
>
> On contrary, 6in4 tunnels are exclusively for IPv6 - they have the smallest
> overhead possible, and based on that factor are more efficient for IPv6
> tunneling than "generic" GRE tunnels.
>
> HTH
> --
> Petr Lapukhov, CCIE #16379 (R&S/Security/SP/Voice)
> petr@internetworkexpert.com
>
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>
> 2008/7/15 Igor Manassypov <imanassypov@rogers.com>:
>
> > any extra functionality, may be?
> >
> > Mohammed Naviwala <monavy@gmail.com> wrote: Hi
> >
> > basically gre has more overheads than ipv6ip tunnell so the ipv6 tunell is
> > preferred....
> >
> > experts......more light on this please...
> >
> >
> > On 7/15/08, Igor Manassypov <imanassypov@rogers.com> wrote: Guys,
> >
> > Whats the principal difference between GRE and ipv6 tunnel encapsulations?
> > On the surface both can do the same thing...
> >
> >
> > Thanks!
> >
> >
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> >
> > --
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> >
> > Mohammed Abdul Razzaq
> >
> >
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-- --- Arden Packeer Cisco Certified Internetwork Expert (CCIE #20716 R&S) Cisco Systems Instructor (CCSI #31090)
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