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Re: [Int-area] draft-shirasaki-isp-shared-addr and Class E networks

Dave Thaler <dthaler@windows.microsoft.com> Mon, 24 November 2008 20:04 UTC

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From: Dave Thaler <dthaler@windows.microsoft.com>
To: Roque Gagliano <roque@lacnic.net>
Date: Mon, 24 Nov 2008 12:04:37 -0800
Thread-Topic: [Int-area] draft-shirasaki-isp-shared-addr and Class E networks
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Subject: Re: [Int-area] draft-shirasaki-isp-shared-addr and Class E networks
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It's been pointed out several times in the past regarding class E
space that you cannot expect a host/app to work if you try to give
it a class E address.

So class E addresses can only be safely used in networks for which
you have complete control/confidence over all the devices/apps
in that network.

It might be usable between routers in an ISP.
It is not really usable to assign a general-purpose PC acting as a CPE.

-Dave

> -----Original Message-----
> From: int-area-bounces@ietf.org [mailto:int-area-bounces@ietf.org] On
> Behalf Of Roque Gagliano
> Sent: Friday, November 21, 2008 1:02 PM
> To: int-area@ietf.org
> Subject: [Int-area] draft-shirasaki-isp-shared-addr and Class E
> networks
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> After the presentation on the intarea session yesterday I though about
> something that was said ( I do not remember the person that did the
> comment) in the last NANOG meeting during the panel: " What Would Jon
> have Done About the Addressing Challenges Currently Facing Us?".
>
> The comment was about what Jon Postel did with the cable companies and
> the 24/8 network. He allocated the address block but forced the cable
> companies to test CIDR. In that sense he gave something and got
> something.
>
> I wonder if we could take that example for the "shared address" case
> and re-activate the re-definition of the Class E space as "for private
> use" (draft-wilson-class-e-02) in order to be able to be use for this
> architectures if the ISP are willing to do so.
>
>
> Roque
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