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Apr 27, 2013

HSS Selection

This is the last point to cover from the list I was presenting many times by now, and the section DNS in LTE will be finished.
Of course if I will face some interesting or will find somewhere example of DNS file will parse it and put it here, so any of you could reuse it.

Last but not least, the HSS Selection procedure.

The Diameter Proxy/Edge agent performs a NAPTR query (as to RFC 3403) for a HSS server in a particular diameter realm (for example, the HPMN or the roaming hub).
These NAPTR records provide a mapping from a domain to the SRV record for contacting a server with the specific transport protocol in the NAPTR services field.  The services relevant for the task of transport protocol selection are those with NAPTR service fields with values “AAA+D2x”, where x is a letter that corresponds to a transport protocol supported by the domain, i.e. D2S is for SCTP.

From my own experience 


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