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Re: [tcpm] TCP Connection ID

Joseph Touch <touch@strayalpha.com> Sun, 17 May 2020 03:39 UTC

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From: Joseph Touch <touch@strayalpha.com>
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Date: Sat, 16 May 2020 20:38:58 -0700
Cc: tcpm@ietf.org
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To: Alexander Azimov <a.e.azimov@gmail.com>
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Subject: Re: [tcpm] TCP Connection ID
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RFC7974


> On May 15, 2020, at 8:07 AM, Alexander Azimov <a.e.azimov@gmail.com> wrote:
> 
> Dear WG,
> 
> As you all know L3 LB is a common element of today's cloud infrastructure. Its original design was based on the connection state that maps backend IPs (real IPs) to connection. Recently there were several papers that were suggesting the move to the stateless L3 LB, where the state (connection id) becomes the property of connection and it kept at the client, so the L3 LB can work without keeping state for every connection. As far as I understand, for QUIC it becomes native with destination connection ID in its header.
> 
> I've seen suggestions for getting this functionality in TCP by overloading the Timestamps option or even TCP SEQ - can't say that such design looks good for me. I wonder was there an attempt to add connection id in the TCP options, and if it was - why it wasn't successful?
> 
> -- 
> Best regards,
> Alexander Azimov
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