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

["Joel M. Halpern" <[e-mail]>]

Robert, you say we are operating on the encapsulating header.
Do things still work right for the case that the authors felt was 
important in the SRH document where the source and destination hosts are 
inside the SR Domain, and therefore there is only one IPv6 header?  (I 
would not be surprised if they do still work.  But your assertion in the 
email below, and the repeated mention that the encapsulated case was the 
only case during the header insertion discussion in Singapore leaves me 
needing to clarify.)

Yours,
Joel

On 12/19/2019 6:01 PM, 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 :)
> 
> Cheers,
> R.
> 
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