Subject: Re: [Dime] Another use case for draft-ietf-dime-realm-based-redirect

From: "Hao, Ruibing" <[email-masked]>
Date: Thu, 7 Jun 2012 13:31:44 +0000

Tina and Tom,

Here is a summary of the challenge we are facing on Sh/Dh interface in a 3GPP IMS deployment where we need to support SLF and Realm-based routing on AS on Sh interface at the same time.

The subscriber data is provisioned in a geo-redundant HSS cluster, each AS need to maintain redundant Diameter Sh links to both cluster nodes and make use of realm-based routing to always go to the local HSS cluster node when it is available.  There can be multiple geo-redundant HSS clusters, SLF can be used to determine which HSS cluster stores the subscriber's service data. With the realm-based redirect proposal, we should be able to maintain the local realm-based routing configuration on each AS.

This might be another good use case for the internet-draft you guys are proposing.

Ruibing Hao
Principal Engineer
Comcast Cable
One Comcast Center
Philadelphia, PA 19103
Tel: 215-286-3991(O)