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Re: [Int-area] draft-bonica-intarea-frag-fragile-01

Joe Touch <touch@strayalpha.com> Sat, 02 June 2018 18:01 UTC

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From: Joe Touch <touch@strayalpha.com>
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Date: Sat, 02 Jun 2018 11:00:59 -0700
Cc: Tom Herbert <tom@herbertland.com>, "int-area@ietf.org" <int-area@ietf.org>
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To: Ron Bonica <rbonica@juniper.net>
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Subject: Re: [Int-area] draft-bonica-intarea-frag-fragile-01
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> On Jun 2, 2018, at 7:57 AM, Ron Bonica <rbonica@juniper.net> wrote:
> 
> ...
>> 
>> 
>> This draft should reference RFC4459 which gives a very good description of
>> MTU and fragmentation problems and handling for network tunnels.
>> 
> 
> RB> Agree. Added in next version.

intarea-tunnels will be updating that RFC. It would be useful to not repeat its incorrect recommendations.

> 
>> GUE could be mentioned in the "IP encapsulations" sections. As proposed by
>> RFC4459, GUE extensions include a fragmentation option within the
>> encapsulation headers in lieu of doing IP fragmentation.
>> This is addresses several of the problems described for IP fragmentation.
>> 
> 
> RB> Could we defer this until GUE gets and RFC number. Otherwise, the draft may be required to list an amazing number of IP-in-IP encapsulations.

That’s already in intarea-tunnels and can be cited there.

However, the IP-in-IP direct case is still very relevant - it is the basis of IPsec (e.g., see in particular RFC3884). This document should not undermine that case.

Joe

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