On Thu, Dec 19, 2019 at 8:45 PM Brian E Carpenter < brian.e.carpen...@gmail.com> 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. I think the root problem may be using the word "pop", which > is relevant in the MPLS label stack context but not here, without > additional definition. > [Gyan] I agree with what Brian is saying that pop in MPLS PHP or UHP you are popping an MPLS label 4 byte shim, where here you are removing the SRH header. Not a really a pop. The MPLS shim is an encapsulation since it’s sits between the L2 and L3 header. I think if we fix the verbiage and change from pop to remove we may want to come up with some other name like PSR & USR if “remove” was used. > > Brian > > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring > -- Gyan S. Mishra IT Network Engineering & Technology Verizon Communications Inc. (VZ) 13101 Columbia Pike FDC1 3rd Floor Silver Spring, MD 20904 United States Phone: 301 502-1347 Email: gyan.s.mis...@verizon.com www.linkedin.com/in/networking-technologies-consultant
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