478 Unresolvable Destination Error

[venkateshchandru]

Hi harlespreeth,

First of all, I want to say you’re doing an excellent job! I’m encountering a couple of issues and would appreciate your help.

1. 478 Unresolvable Destination Error:
   When trying to make a call between two UE
   call_issue.zip
   , I get a "478 Unresolvable Destination" error. Everything is configured as per the instructions, but the problem persists.

2. PCSCF NAT-PING Error:
   I’m also seeing the following error in PCSCF logs:

10(1857) ERROR: <script>: Preloading NAT-PING. Rows: 0

Additionally, I have a couple of questions:
1.When dialing from Party A to Party B, should I use Party B's MSISDN number?
2.Is configuring the MSISDN in the SIM mandatory, or is it optional?(Because for both mobiles i am getting same msisdn please refer attached pcap packets 8 and 17)

Any assistance with resolving these issues and clarifying the MSISDN configuration would be greatly appreciated.

Thank you!

[herlesupreeth]

1.When dialing from Party A to Party B, should I use Party B's MSISDN number?

You should use the number you configured in the HSS (not the one programmed on the SIM)

2.Is configuring the MSISDN in the SIM mandatory, or is it optional?(Because for both mobiles i am getting same msisdn please refer attached pcap packets 8 and 17)

Its optional

I see you are sending an SMS towards 919560345888 but it needs to a UE registered with the same IMS. Say if you have two UEs with numbers configured in HSS as 701 and 702 respectively, you need to first registers them both with IMS and only after that attempt to send SMS between them

[venkateshchandru]

Thank you for your response!

Both UEs are registered with the IMS server. However, I'm encountering an issue when trying to initiate the call. call is not establishing.

Packets 3 and 12 confirm that both UEs are registered, and the INVITE message starts from packet 20. However, the IMS server responds with a 478 Unresolvable Destination error. I have also tried dialing with the corresponding MSISDN configured in the PyHSS.

Could you please review the PCAP file and help me understand what might be causing the issue and how it can be resolved?
call_issue.zip

[herlesupreeth]

Please retake the pcap without any filters for the following scenario:

1. Start packet capture
2. Attach two UEs and complete IMS registration
3. Then, attempt calling
4. Stop packet capture and post it here