[c-nsp] ipv6ip vs gre

[Mohacsi Janos]

On Fri, 1 Jun 2007, Gert Doering wrote:

> Hi,
>
> On Fri, Jun 01, 2007 at 07:41:01AM -0700, matthew zeier wrote:
>> What's the difference between an ipv6ip tunnel and a gre tunnel?
>
> Well, one is using IPv6-IP encapsulation, and the other is using GRE
> encapsulation.
>
> Sort of like "what is the difference between a BMW and a Chrysler?" - both
> are transport vehicles, but they look different...

One important difference: ipv6-ip encapsulation is an IPv6 only solution, 
while GRE is more general one (with some more byte overhead). However if 
you want to run IS-IS on the tunnel you should use GRE since CLNS can be 
transfered over GRE...
Regards,

Janos Mohacsi
Network Engineer, Research Associate, Head of Network Planning and Projects
NIIF/HUNGARNET, HUNGARY
Key 70EF9882: DEC2 C685 1ED4 C95A 145F  4300 6F64 7B00 70EF 9882