Question about IP-in-IP tunneling

Question about IP-in-IP tunneling

[Santwona.Behera]

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

RE: Question about IP-in-IP tunneling

[Srivats P]

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: netdev-owner@vger.kernel.org [mailto:netdev-owner@vger.kernel.org] On Behalf Of Santwona.Behera@Sun.COM
Sent: Friday, February 27, 2009 2:37 AM
To: netdev@vger.kernel.org
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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Re: Question about IP-in-IP tunneling

[Santwona.Behera]

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: netdev-owner@vger.kernel.org [mailto:netdev-owner@vger.kernel.org] On Behalf Of Santwona.Behera@Sun.COM
> Sent: Friday, February 27, 2009 2:37 AM
> To: netdev@vger.kernel.org
> 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
> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> Conexant E-mail Firewall (Conexant.Com) made the following annotations
> ---------------------------------------------------------------------
> ********************** Legal Disclaimer **************************** 
> 
> "This email may contain confidential and privileged material for the sole use of the intended recipient. Any unauthorized review, use or distribution by others is strictly prohibited. If you have received the message in error, please advise the sender by reply email and delete the message. Thank you." 
> 
> ********************************************************************** 
> 
> ---------------------------------------------------------------------
>