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[sfc] Use of IPv6 EHs?

Tim Chown <tjc@ecs.soton.ac.uk> Wed, 26 March 2014 14:09 UTC

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Date: Wed, 26 Mar 2014 14:08:42 +0000
References: <2691CE0099834E4A9C5044EEC662BB9D4535F337@dfweml701-chm.china.huawei.com> <CF574684.A63B%repenno@cisco.com> <94C682931C08B048B7A8645303FDC9F36F528DEB91@PUEXCB1B.nanterre.francetelecom.fr> <080093CE-B4B2-4ABF-B5C0-45FBDBC974F5@ecs.soton.ac.uk>
To: mohamed.boucadair@orange.com, "sfc@ietf.org" <sfc@ietf.org>
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Archived-At: http://mailarchive.ietf.org/arch/msg/sfc/Cs2LpMfZwikwbir3e-64TfHES5I
Subject: [sfc] Use of IPv6 EHs?
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On 26 Mar 2014, at 12:23, <mohamed.boucadair@orange.com> <mohamed.boucadair@orange.com> wrote:

> Hi Reinaldo, all,
>  
> In addition to these two ones, other alternatives are discussed in http://tools.ietf.org/html/draft-boucadair-sfc-design-analysis-02

Hi,

A couple of comments on the potential use of IPv6 EHs referenced in your design document.

Firstly, RFC6564 is being updated by draft-gont-6man-ipv6-universal-extension-header-00.

Secondly, some tests that we’ve run recently (to Alexa top1m IPv6-enabled sites) show the drop rate on packets with IPv6 EHs is quite significant. These were reported by ourselves and Fernando Gont in the IETF89 IEPG meeting. There have been a number of I-Ds discussing EH handling, but the results ‘in the wild’ are poor.  I understand that SFC is targeted at single domain environments, but it’s not clear as yet whether drops are due to administrative policy, or implementation shortcomings. If the latter, then these may be an issue for at least some time for any SFC solution dependent on their use.

Tim

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