Hi Joe,

> -----Original Message-----
> From: Joe Touch [mailto:[email protected]]
> Sent: Friday, February 27, 2015 3:02 PM
> To: Templin, Fred L; Ronald Bonica; Carlos Pignataro (cpignata)
> Cc: [email protected]
> Subject: Re: [Int-area] draft-ietf-intarea-gre-ipv6
> 
> 
> 
> On 2/27/2015 2:16 PM, Templin, Fred L wrote:
> > Ah, here is the source of the confusion. IPv6/IPv4 translators do not use
> > encapsulation so there is no such thing as an outer header.
> 
> I would argue there's no such thing as an inner header.
> 
> When you translate from one to another, you take OFF the IPv6 header and
> add the IPv4 one.

Right, per the correction I supplied in my last message.

> That's never confused as IPv6 on-path fragmentation because the receiver
> is now IPv4.
> 
> I.e., this is consistent with IPv4 allowing on-path fragmentation, and
> consistent with IPv6 never fragmenting on-path.

You are being dogmatic for no good reason. If a tunnel ingress is handed
an atomic fragment with a good ID, then it should fragment the packet if
necessary. It is just as if the original source had fragmented the packet 
itself.

Thanks - Fred
[email protected]

> Joe

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