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RE: [Technical Errata Reported] RFC8200 (5933)

Ron Bonica <rbonica@juniper.net> Thu, 12 December 2019 22:52 UTC

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From: Ron Bonica <rbonica@juniper.net>
To: Brian E Carpenter <brian.e.carpenter@gmail.com>, Fernando Gont <fgont@si6networks.com>, "ipv6@ietf.org" <ipv6@ietf.org>
Subject: RE: [Technical Errata Reported] RFC8200 (5933)
Thread-Topic: [Technical Errata Reported] RFC8200 (5933)
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References: <20191211032724.46F77F406F3@rfc-editor.org> <ead110b0-3198-2894-3c63-9362276b0cc4@gmail.com> <cffb0a8e-2119-a474-4dce-f3b5a67dac47@si6networks.com> <bfa67fe0-850d-941d-a446-559a2907da25@gmail.com> <4efde70d-e368-3b47-58c7-f7b5fb3c13d3@si6networks.com> <1331438c-27d3-092c-b13f-66f2314bdfa7@gmail.com>
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+1



Juniper Business Use Only

-----Original Message-----
From: ipv6 <ipv6-bounces@ietf.org> On Behalf Of Brian E Carpenter
Sent: Thursday, December 12, 2019 3:12 PM
To: Fernando Gont <fgont@si6networks.com>; ipv6@ietf.org
Subject: Re: [Technical Errata Reported] RFC8200 (5933)

On 12-Dec-19 18:45, Fernando Gont wrote:
> On 11/12/19 23:22, Brian E Carpenter wrote:
>> Yes, a note that updating Segments Left is legal would fix it I think.
> 
> It would seems to me that more is needed. For instance, for RHT0 you 
> had to swap the address in the Destination Address with  with the next 
> segment in the RHT0 payload.

Yes, decrementing Segments Left presumably applies to all routing headers, but you are correct that other changes might be specified.

> 
> So I guess the text should look something like:
> 
>     A Routing Header is not inserted, or deleted by any node along a
>     packet's delivery path, until the packet reaches the final
>     destination node (or each of the set of final destination nodes, in
>     the case of multicast). A Routing Header is not processed by any
>     node along a packet's delivery path, until the packet reaches the
>     destination node (or each of the set of destination nodes, in the
>     case of multicast) identified by the Destination Address field of
>     the IPv6 header.
> 
> ?

OK

> 
> I wonder if it might be better to keep the insertion/deletion part in 
> a single place, to avoid repetiton, and then just discuss processing, 
> but not insertion/deletion.  -- Or whether repetition is needed for 
> each of the "special" EHs, such that folk do not assume that the 
> comments on insertion/deletion do not applyto the "special" EHs.

I would prefer spelling it out in detail to avoid doubt.

   Brian

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