Re: ITP does not sent TFP for downed AS when connecting M2PA?
Thanks for the information. The specification that we should look into on this case is ITU Q.704 (Attached on this reply).
Over section 13.2.2 there is a list of the conditions when a TFP is sent, and it seems that according to this point ITP would send TFP for destination X, if X is inaccessible from ITP.
On the other hand and as far as my understanding goes, ITP2 from your topology is restaring MTP; so in section 9.2 there are two phases if signaling point has transfer functions. From your case phase 1 seems to be fine, however on phase 2 the broadcast on non-preventive TFP seems to occur for signaling link sets which are not available, and nothing else is mentioned on the speficiation apart from that.
I got a question on the test scenario:
a) Which part comes down first? M3UA and or M2PA? Becuase if M3UA goes down and M2PA is still up, ITP1 will receive TFP from ITP2; then when M2PA goes down and up on ITP2, ITP1 would send TFP to ITP2 with affected PC as M3UA's PC, and no TFP would be sent from ITP2 to ITP1 under such conditions.
Hope that this update helps you to clarify the current situation.
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Transferring Crash file from standby:
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