SCP Model-D Fallback
If you have configured the SCP failure handling with the "retry" action, then SMF attempts an alternate SCP based on SCP configuration and the retry count configuration. After completion of the configured retry counts or unavailability of any alternate SCPs for retrying, the SMF does a fallback from model-D to model-A in the following scenarios:
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SCP triggers an error, with the "Server" header indicating "scp".
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The "retry-and-fallback" action is configured.
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NF client configuration for the peer is available.