Re: [v6ops] I-D Action: draft-ietf-v6ops-ula-usage-recommendations-02.txt

[William Cerveny <[e-mail]>]

Posting onto the list with what I said at the v6ops meeting on Thursday:

I’ve been using a ULA in a test lab for perhaps 6 years.  They work fine
and serve our requirement for having a block of addresses that can be
routed within the test lab at a single location.  It is possible that at
some point we will want to route with a different test lab, for which we
wouldn’t want this traffic to leave either test lab. We aren’t routing
the traffic outside of the test lab and for our application it is
undesirable for our test traffic left the test lab.

I can think of two situations where ULAs would be more valuable in
“isolated” networks than GUAs would be:
1) We don’t ever want the traffic addressed with ULAs to leave the test
network. If we addressed with a GUA, it would be easier for the traffic
to be accidentally routed outside the test lab (I think Fred spelled out
this scenario).
2) There may be administratively complex or prohibitive challenges in
acquiring GUAs for specific projects. If one were to need addresses
(other than link-local addresses) for a small isolated network an
assigned GUA is unavailable, it could be desirable to use a ULA instead
of random address space.

Bill Cerveny

On Fri, Feb 14, 2014, at 05:13 AM, [e-mail] wrote:
> 
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
>  This draft is a work item of the IPv6 Operations Working Group of the
>  IETF.
> 
>         Title           : Recommendations of Using Unique Local Addresses
>         Authors         : Bing Liu
>                           Sheng Jiang
> 	Filename        : draft-ietf-v6ops-ula-usage-recommendations-02.txt
> 	Pages           : 15
> 	Date            : 2014-02-14
> 
> Abstract:
>    This document provides guidance of how to use ULAs. It analyzes ULA
>    usage scenarios and recommends use cases where ULA addresses might be
>    beneficially used.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-v6ops-ula-usage-recommendations/
> 
> There's also a htmlized version available at:
> http://tools.ietf.org/html/draft-ietf-v6ops-ula-usage-recommendations-02
> 
> A diff from the previous version is available at:
> http://www.ietf.org/rfcdiff?url2=draft-ietf-v6ops-ula-usage-recommendations-02
> 
> 
> Please note that it may take a couple of minutes from the time of
> submission
> until the htmlized version and diff are available at tools.ietf.org.
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
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