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Re: I-D Action: draft-voyer-6man-extension-header-insertion-07.txt

Fernando Gont <fgont@si6networks.com> Mon, 14 October 2019 22:16 UTC

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Subject: Re: I-D Action: draft-voyer-6man-extension-header-insertion-07.txt
To: Tom Herbert <tom@herbertland.com>, Mark Smith <markzzzsmith@gmail.com>
Cc: 6man WG <ipv6@ietf.org>
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From: Fernando Gont <fgont@si6networks.com>
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On 14/10/19 16:53, Tom Herbert wrote:
> On Mon, Oct 14, 2019 at 2:15 PM Mark Smith <markzzzsmith@gmail.com> wrote:
>>
>> Now that tunnelling has been accepted, and that a distinct IP tunnel could be created for each segment, 1:1, with tunnel/segment heads or tails being the place where the SRH can be created or transferred, with or without modification, or over from the previous segment/tunnel, which does comply with RFC8200 (as tunnel endpoints are IPv6 hosts), there is no functional need for mid-tunnel anonymous insertion.
>>
> Mark,
> 
> I would tend to agree. It seems that the only purported benefit of SR
> insertion over tunneling is that it saves packet overhead.

If folks want to optimize things, then, may I ask: why are you using
128-bit SIDs in the first place?

P.S.: In any case, it's interesting to see version -07 still fail to
argue why insertion rather than encapsulation, and have participants
theorize about it, when that argument/discussion should be part of any
sensible proposal to change the current state of affairs.

Thanks,
-- 
Fernando Gont
SI6 Networks
e-mail: fgont@si6networks.com
PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492

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