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Re: [v6ops] WG Doc? draft-gont-v6ops-ipv6-ehs-packet-drops

Mark Smith <markzzzsmith@gmail.com> Sun, 13 March 2016 23:05 UTC

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From: Mark Smith <markzzzsmith@gmail.com>
Date: Mon, 14 Mar 2016 10:05:03 +1100
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To: Nick Hilliard <nick@foobar.org>
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Subject: Re: [v6ops] WG Doc? draft-gont-v6ops-ipv6-ehs-packet-drops
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On 14 March 2016 at 07:54, Nick Hilliard <nick@foobar.org> wrote:
> otroan@employees.org wrote:
>> in every router / middlebox on the planet. (and somewhat tangential
>> for any RFC describing shared IPv4 addresses)
>

<snip>

>
> The point of the draft is to note that excessive EHs will contribute to
> a deterioration of entropy in flow hash inputs and that this has
> operational consequences.
>

So in the medium term, the specific use of LAG and/or ECMP to bundle
links, and their desire to look at transport layer headers, might
disappear. I came across work on "Flex Ethernet" the other day, and
one thing it seems to be looking to do is to solve the problem of link
bundling without the dependencies on layer 2/3/4 field values.

"What is FlexEthernet?"
http://www.ethernetsummit.com/English/Collaterals/Proceedings/2015/20150415_1C_Gustlin.pdf

"Flex Ethernet Implementation Agreement"
http://www.oiforum.com/wp-content/uploads/OIF-FLEXE-01.0.pdf

Regards,
Mark.

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