Re: [Int-area] WG Adoption Call: IP Fragmentation Considered Fragile

Mikael Abrahamsson <swmike@swm.pp.se> Sun, 29 July 2018 06:25 UTC

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Date: Sun, 29 Jul 2018 08:24:59 +0200
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Joe Touch <touch@strayalpha.com>
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Subject: Re: [Int-area] WG Adoption Call: IP Fragmentation Considered Fragile
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On Sat, 28 Jul 2018, Joe Touch wrote:

> because DPI and NAT devices don’t reassemble. And they don’t because 
> it’s cheaper to sell devices that say they run at 1 Gbps (e.g.) that 
> don’t bother to reassemble.

Keeping lots of state is always more expensive than not keeping state, and 
customers like lower cost devices.

> So pushing this to another layer will never solve it. What will solve it 
> will only be a compliance requirement for #6 - which could be done right 
> now, and has to be done for ANY solution to work.

Where is that Internet Protocol Police when you need it? I appreciate your 
struggle, but I don't see how you will succeed in your struggle, in 
reality.

So I prefer to recommend not to rely on IP level fragmentation, and 
fragment at higher layers. It works better in reality.

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se