Re: [Dime] I-D Action: draft-ietf-dime-realm-based-redirect-05.txt

Tom Taylor <tom.taylor.stds@gmail.com> Mon, 16 July 2012 11:42 UTC

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Date: Mon, 16 Jul 2012 07:43:13 -0400
From: Tom Taylor <tom.taylor.stds@gmail.com>
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Subject: Re: [Dime] I-D Action: draft-ietf-dime-realm-based-redirect-05.txt
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The document has been updated according to the proposals I made last 
week, but I'm not sure I've gotten it right. Restricting redirection to 
servers meant fairly extensive changes. I think the issue is worth 
discussing in the meeting, and I'd be quite happy to roll back to using 
redirect servers if the consensus favours that.

It occurred to me that redirection need not necessarily disrupt existing 
sessions. It could just be applied to initial messages of a session. I 
added text that allowed an application incorporating realm-based 
redirection to specify which way to go.

I'm not tremendously happy with the following provision, added in 
response to a point raised by a reviewer:

o  If the request contains a Destination-Host AVP, the server MUST
    set the 'E' bit in the answer and set the Result-Code AVP to
    DIAMETER_UNABLE_TO_DELIVER.

This seems sub-optimal, since it doesn't allow the server to indicate 
that the whole realm is out of bounds.

Clearly this is going to need another WGLC because of the extent of the 
changes I've made. Could we have 15 minutes, or at least ten, to discuss 
issues with the draft at the meeting before we go any further?

Tom Taylor

On 15/07/2012 10:39 PM, internet-drafts@ietf.org wrote:
>
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
>   This draft is a work item of the Diameter Maintenance and Extensions Working Group of the IETF.
>
> 	Title           : Realm-Based Redirection In Diameter
> 	Author(s)       : Tina Tsou
>                            Ruibing Hao
>                            Tom Taylor
> 	Filename        : draft-ietf-dime-realm-based-redirect-05.txt
> 	Pages           : 8
> 	Date            : 2012-07-15
>
> Abstract:
>     The Diameter protocol allows a Diameter redirect agent to specify one
>     or more individual hosts to which a Diameter message may be
>     redirected by an upstream Diameter node.  However, in some
>     circumstances an operator may wish to redirect messages to an
>     alternate domain without specifying individual hosts.  This document
>     specifies a mechanism by which this can be achieved.  New
>     applications may incorporate this capability by reference to the
>     present document.
>
...

[Dime] I-D Action: draft-ietf-dime-realm-based-re… internet-drafts
Re: [Dime] I-D Action: draft-ietf-dime-realm-base… Tom Taylor
Re: [Dime] I-D Action: draft-ietf-dime-realm-base… jouni korhonen