Re: A common problem with SLAAC in "renumbering" scenarios

Fernando Gont <fgont@si6networks.com> Sat, 16 February 2019 02:23 UTC

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Subject: Re: A common problem with SLAAC in "renumbering" scenarios
To: Jan Zorz - Go6 <jan@go6.si>, ipv6@ietf.org
References: <60fabe4b-fd76-4b35-08d3-09adce43dd71@si6networks.com> <4602.1549908472@localhost> <CAO42Z2w1swQNuwnrOyTCEMXt0NSyrBx7Ww3kUN-7dfEV=fvk3A@mail.gmail.com> <c16e0e1f-1ed2-ad88-80f1-070bdd8bccca@go6.si> <1F2C2AEE-1C7D-481C-BBA7-7E507312C53A@employees.org> <e56a6e5b-648d-200e-c35d-97f15a31fb2a@asgard.org> <CAO42Z2zh7fKAgQJq9aLCTiFoSSsTeGM=pK3gXitg+gcxH=9fhQ@mail.gmail.com> <d38857c2-6e92-91d6-bb5d-d3eeeb61276a@gmail.com> <CAO42Z2yb47OyXk__Sz-kO00pfcBJgLAhff5DF=mpAddR0iCnAA@mail.gmail.com> <2612280f-195a-ae7a-b3b1-9022d9282fa7@foobar.org> <56F813F4-C512-40A9-8A68-1090C76A80F6@consulintel.es> <CAHL_VyCN8kU7qnLOphfGR25-xGBe_p6WeGTkKVXwU5uy5aJ8Dg@mail.gmail.com> <65DB4854-97D2-4C31-A691-2CD93812EF93@consulintel.es> <CAHL_VyCMpCcGkEQu+RV1GRf2QLB-HD0+AOOBV0YhfQ5sbydVzQ@mail.gmail.com> <8CE7A0CD-97D9-46A0-814D-CAF8788F9964@consulintel.es> <e3e0bf2273e04f15b792665d0f66dfe5@boeing.com> <4c5fab33-2bff-e5b5-fc1d-8f60a01a146d@go6.si>
From: Fernando Gont <fgont@si6networks.com>
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Date: Fri, 15 Feb 2019 23:21:11 -0300
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On 14/2/19 20:19, Jan Zorz - Go6 wrote:
> On 14/02/2019 20:30, Manfredi (US), Albert E wrote:
>> If the prefix is known to be 64 bits wide, and is persistent, that
>> prefix identifies a household every bit as positively as a persistent
>> 64-bit IID identifies a device. How come we aren't seeing
>> recommendations AGAINST persistent prefixes for CPE devices?
> 
> Because in current state of today generic
> ISP_provisioning/CPE/host_stack implementations combination it doesn't
> work properly in real environment. 

Yeah, we need to improve what we have. :-)



> ISPs ASNs and IPv6 traffic gets
> blacklisted by large content providers that are measuring for broken
> IPv6 implementations. Happened many times, hence this effort to make
> situation better :)
> 
> To augment what many already have said here - it's a tie between IP
> address and household address and name/surname that should not be
> public, the address itself is mostly harmless and it doesn't matter if
> it's static or dynamic. Tracing gets done on L7 and above anyway ;)

Not really. RFC4941 and RFC7721 is actually and argument against that.

-- 
Fernando Gont
SI6 Networks
e-mail: fgont@si6networks.com
PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492