Can Diameter Signaling Router (DSR) Receive Answer Messages on Connections Other Than Those That Sent the Request?

Asset ID:	1-71-2241293.1
Update Date:	2017-03-08
Keywords:

Solution Type Technical Instruction Sure

Solution 2241293.1 : Can Diameter Signaling Router (DSR) Receive Answer Messages on Connections Other Than Those That Sent the Request?

Applies to:

Oracle Communications Diameter Signaling Router (DSR) - Version DSR 7.0.1 and later
Information in this document applies to any platform.

Goal

The goal of this article is to explain one condition under which the DSR may appear to ignore received Answer messages, resulting in pending answer timer expiry for the exchange.

Solution

The DSR will not match an Answer to a stored Request if the Answer message is received on a connection different from the connection the on which Request was sent.

The DSR will check the Hop-by-Hop ID, IP Address, port, and protocol stored from the Request to pair against the received Answer.

If any do not match, the Answer is discarded as an 'Orphan Answer'.

Eventually the PAT expires and the originating Request peer is sent an Error Answer (3002).

References

<BUG:21072456> - SUPPORT ANSWER MESSAGE BACK FROM DIFFERENT CONNECTIONS

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