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Re: [Int-area] Comment on draft-ietf-intarea-frag-fragile-02

Joe Touch <touch@strayalpha.com> Thu, 08 November 2018 15:32 UTC

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From: Joe Touch <touch@strayalpha.com>
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Date: Thu, 08 Nov 2018 07:32:19 -0800
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To: Jen Linkova <furry13@gmail.com>
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Subject: Re: [Int-area] Comment on draft-ietf-intarea-frag-fragile-02
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> On Nov 8, 2018, at 12:46 AM, Jen Linkova <furry13@gmail.com> wrote:
> 
> Network Operators Recommendations section
> 
> (https://tools.ietf.org/html/draft-ietf-intarea-frag-fragile-02#section-7.4)
> 
> recommends that operators do not filter ICMPv6 PTB. I believe it would
> be beneficial to make an explicit recommendation to permit fragmented
> packets to/from operator's DNS servers.

Fragment forwarding is a MUST in our standards.

This document is BCP and cannot update a standard. It cannot relax that requirement, so the middlebox needs to be updated accordingly.

*Additionally*, it’s bad practice to indicate “SHOULD” unless the text also explains why it isn’t a MUST, i.e., under what conditions it is OK to not forward fragments.

Joe

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