OK. In that case I would add to the initial registry

  4 - locally meaningful name

In our product, the gateways have "names" that appear both in the GUI and the 
configuration files (and logs). It's easier for them to fetch another gateway's 
"object" by name than by IP address. Such a name could be ASCII or UTF-8.
________________________________________
From: Tero Kivinen [[email protected]]
Sent: Wednesday, May 27, 2009 13:02
To: Yoav Nir
Cc: [email protected]
Subject: [IPsec] Some comments about redirect

Yoav Nir writes:
> Section 10 sets up an IANA registry for identity types. Couldn't we
> just reuse the "IKEv2 Identification Payload ID Types"?  There's
> already IPv4, IPv6 and FQDN, and additionally KEY_ID for locally
> meaningful names and a range of private use IP addresses. Why set up
> a new registry for the same thing?

I do not think we want reuse IKEv2 Identification Payload ID types for
this, as then we again create lots of values which are not defined
(i.e. what does it mean to send ID_DER_ASN1_GN during redirect). I
prefer to have separate registry for it. I would actually like to have
separate registries for the two different use cases there is, as not
all values are usable in both cases.

Creating new IANA registries has small initial overhead, and if there
will not be any more allocations there is no more overhead for having
its own registry compared to sharing IKEv2 one.

On the other hand if there will be new allocations then even better if
we have separate registry for them so we do not mess up other
registries.
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