Limitations
The Local Configuration for NF Discovery feature has the following limitations:
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Discovery and load balancing are available only for the UDM, PCF, CHF, and AMF but not for the UPF.
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Support for the liveliness check of the NF endpoints is currently not available.
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The SMF attempts the NF discovery first on the primary host. In the absence of the primary host, the SMF attempts the discovery on the secondary host and switches to the tertiary if both the primary and secondary are unavailable.