Subject: Re: Question about IP-in-IP tunneling

From: [email-masked]
Date: Fri, 27 Feb 2009 09:14:16 -0800

That does answer my question, thank you. Extending this to IPv6 as the 
outer header, is the next header field IPROTO_IPIP for IPv4 inner header 
and IPPROTO_IPV6 for IPv6 inner header?

thanks!
--santwona

On 02/26/09 08:15 PM, Srivats P wrote:
> Assuming the outer IP header is a IPv4 header, the protocol field of this IPv4 header has IPROTO_IPIP (4) when the inner header is IPv4 and IPPROTO_IPV6 (41) when the inner header is IPv6
> 
> Is that what you asked?
> 
> - Srivats
> 
> -----Original Message-----
> From: [email-masked] [mailto:[email-masked]] On Behalf Of [email-masked]
> Sent: Friday, February 27, 2009 2:37 AM
> To: [email-masked]
> Subject: Question about IP-in-IP tunneling
> 
> A question for the IP tunneling experts:
> 
> For IP-in-IP tunneling, what are the cases when IPROTO_IPIP (4) is used in the protocol field of the outer IP header and the cases when
> IPPROTO_IPV6 (41) is used instead?
> 
> thanks,
> --santwona
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