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Re: [Tsv-art] Tsvart last call review of draft-ietf-lisp-rfc6830bis-15

Dino Farinacci <farinacci@gmail.com> Thu, 30 August 2018 14:55 UTC

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From: Dino Farinacci <farinacci@gmail.com>
In-Reply-To: <B466126A-DBE8-4088-AC93-F7D49C534ABE@trammell.ch>
Date: Thu, 30 Aug 2018 07:55:16 -0700
Cc: draft-ietf-lisp-rfc6830bis.all@ietf.org, tsv-art@ietf.org, IETF Discussion Mailing List <ietf@ietf.org>, "lisp@ietf.org list" <lisp@ietf.org>
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To: "Brian Trammell (IETF)" <ietf@trammell.ch>
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Subject: Re: [Tsv-art] Tsvart last call review of draft-ietf-lisp-rfc6830bis-15
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> On Aug 30, 2018, at 2:57 AM, Brian Trammell (IETF) <ietf@trammell.ch> wrote:
> 
> hi Dino,
> 
> Almost. How about:
> 
> 
> OLD:
> 
> When the UDP and LISP headers require integrity protection, the
> methods of using UDP checksums in [RFC8085] can be considered.
> 
> NEW:
> 
> Implementors are encouraged to consider UDP checksum usage guidelines in section 3.4 of [RFC8085]. Specifically, when the UDP, LISP, and outer IPv6 headers require protection against corruption, the use of non-zero UDP checksums is RECOMMENDED.

Well if we recommend it and when describing the UDP header in the packet format section we don’t that woudl be a contracdiction. And note the IPv6 outer header cannot be protected with a UDP checksum. The link-layer CRC will do that.

NEWNEW:

Implementors are encouraged to consider UDP checksum usage guidelines in section 3.4 of [RFC8085] when
it is desirable to protect UDP and LISP headers against corruption.

What do you think?

Dino

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