How it Works

SMF provides configuration to determine the behaviour when the NRF is unreachable and has an expired cache entry. The CLI provides the following options to determine:

  • If the cache entry needs to invalidate on expiry.

  • If the cache entry needs to be invalidated, along with the duration to retain the cache entry after the validity expiry.

These options are applicable only if the NRF is inactive. The configuration is according to the nf-pair profile. The configuration determines if SMF should use expired cache in case NRF becomes inactive and if it uses the expired cache, along with the duration to retain the cache entry after the validity expiry.