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Re: draft-dolson-plus-middlebox-benefits (was RE: Review of draft-mm-wg-effect-encrypt-09)

Jeff Tantsura <jefftant.ietf@gmail.com> Wed, 12 April 2017 04:56 UTC

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Date: Tue, 11 Apr 2017 21:55:49 -0700
Subject: Re: draft-dolson-plus-middlebox-benefits (was RE: Review of draft-mm-wg-effect-encrypt-09)
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: Brian E Carpenter <brian.e.carpenter@gmail.com>, Nick Hilliard <nick@foobar.org>
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Thread-Topic: draft-dolson-plus-middlebox-benefits (was RE: Review of draft-mm-wg-effect-encrypt-09)
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Brian,

ECMP and LAG (often same code) in most cases indeed use 5 tuples to populate hashing buckets for per flow load balancing.
Cheers,
Jeff
On 4/11/17, 19:26, "ietf on behalf of Brian E Carpenter" <ietf-bounces@ietf.org on behalf of brian.e.carpenter@gmail.com> wrote:

    On 12/04/2017 06:54, Nick Hilliard wrote:
    > Brian E Carpenter wrote:
    >> BTW I don't see ECMP or load balancing listed in section 3. Those
    >> seem to be major applications of transport layer snooping.
    > 
    > no, any load balancing which needs to scale needs to be stateless, so
    > you don't want session based mechanisms handling this.
    
    Server load balancing is often stateful, and even stateless SLB
    usually includes transport info in the hash. Or so I learned while
    working on RFC 7098. People who know also informed me that ECMP
    sometimes (not always) uses transport info (see RFC 6438).
    
       Brian

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