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Re: [spring] I-D Action: draft-ietf-spring-srv6-network-programming-06.txt

Fernando Gont <fernando@gont.com.ar> Fri, 20 December 2019 10:33 UTC

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To: Brian E Carpenter <brian.e.carpenter@gmail.com>, Robert Raszuk <robert@raszuk.net>
Cc: "spring@ietf.org" <spring@ietf.org>, "Pablo Camarillo (pcamaril)" <pcamaril@cisco.com>
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From: Fernando Gont <fernando@gont.com.ar>
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Date: Fri, 20 Dec 2019 00:22:00 -0500
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/hi7wtITi9wM6mL2tht7AEEqkq0E>
Subject: Re: [spring] I-D Action: draft-ietf-spring-srv6-network-programming-06.txt
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On 19/12/19 20:44, Brian E Carpenter wrote:
> On 20-Dec-19 12:01, Robert Raszuk wrote:
>>>    And where is it forwarded to, since we are already at the DA?
>>
>> PSP operates at the n-1 segment end of the SR path so naturally after swapping DA it is forwarded to the segment end. Note that we are all along operating on the encapsulated header ... original packet including its original IPv6 header is sitting as passenger here. 
>>
>> So last segment here will received encapsulated IPv6 packet will decapsulate it and fwd based on the original DA. 
>>
>> Seems very simple :) 
> 
> Right, but the language in the PSP sub-section does not talk about decapsulation. 

Because it's not. :-) They are deleting an EH.

Thanks,
-- 
Fernando Gont
e-mail: fernando@gont.com.ar || fgont@si6networks.com
PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1

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