AMF consists of the following layers as part of the cloud native architecture:

• Protocol Layer—NGAP/NAS over SCTP transport and SBA over REST/HTTP transport

  Example: AMF-protocol and AMF REST-EP

• Service Layer—Business logic of AMF functionality

  Example: AMF-service pod

• Datastore Layer—Supports session storage

  Example: CDL

The management entities Etcd, Cache pod, and NodeMgr provide services to the Protocol Layer, Service Layer, and Datastore Layer functionalities.

The following figure explains the architecture of AMF instance with separate namespace of CDL.

The CDL is deployed as an independent entity which acts as a session store for AMF. The AMF instance performs the following:

The CDL can be configured with slice name as AMF to store the AMF sessions. The AMF instance performs the following:

• Provides instance ID by enhancing the existing session gRPC APIs of CDL or using session-related CDL gRPC APIs.

• Uses the slice name as AMF for session store with CDL.

The CDL exposes the gRPC API to register or deregister notification URI. The AMF instance uses gRPC API to provide the notification URI details to CDL.

The CDL searches for the notification URI in session lookup with instance ID. If the notification URI fails, the CDL picks another URI from the list in round robin.

The CDL in same namespace as AMF configuration must be done in AMF Ops Center.

To configure CDL in same namespace as AMF, use the following example configuration:

cdl label-config session 
   endpoint key key_value 
   endpoint value endpoint_value 
   slot map  no_of_slot_maps 
      key key_value 
      value value 
   end 
   index map map_number 
      key key_value 
      value value 
   end 
cdl logging default-log-level log_level 
cdl datastore session 
   cluster-id cluster_id 
   label-config session 
      slice-names cdl_slice_name 
      endpoint replica replica_number 
      index replica replica_number 
      index map map_number 
         index write-factor write_factor 
      end 
      slot replica replica_number 
      slot map map_number 
         slot write-factor write_factor 
      end 
   end 
end 
cdl kafka replica replica_number 
cdl kafka storage storage_value 

NOTES:

• endpoint key key_value —Specify the key for the endpoint configuration.

• endpoint value endpoint_value —Specify the value associated with the endpoint key.

• slot map no_of_slot_maps —Specify the number of partitions to be created for slot. Must be an integer in the range of 1–1024.

• key key_value —Specify the key for the slot map.

• value value —Specify the value associated with the slot map key.

• index map map_number —Specify the number of partitions to be created for index. Must be an integer in the range of 1–1024.

• key key_value —Specify the key for the index map.

• value value —Specify the value associated with the index map key.

• cdl logging default-log-level log_level —Specify the default logging level for the system.

• cluster-id cluster_id —Specify the the cluster ID for the datastore session.

• slice-names cdl_slice_name —Specify the CDL slice names. cdl_slice_name must be an alphanumeric string from 1 to 16 characters in length.

• endpoint replica replica_number —Specify the number of replicas to be created. The default value is 1. Must be an integer in the range of 1–16.

• index replica no_of_replicas_per_map —Specify the number of replicas to be created. The default value is 2. num_replica must be an integer in the range of 1–16.

• index write-factor write_factor —Specifythe number of copies to be written before successful response. The default value is 1. write_factor must be an integer in the range of 0–16.

• slot replica replica_number —Specify the number of replicas to be created. The default value is 1. num_replica must be an integer in the range of 1–16.

• slot map map_number —Specify the number of partitions in a slot. The default value is 1. num_map/shards must be an integer in the range of 1–1024.

• slot write-factor write_factor —Specify the number of copies to be written before successful response. The default value is 1. write_factor must be an integer in the range of 0–16. Make sure that the value is lower than or equal to the number of replicas..

To configure CDL in a different namespace as AMF, use the following configuration:

cdl label-config session 
   endpoint key key_value 
   endpoint value endpoint_value 
   slot map  no_of_slot_maps 
      key key_value 
      value value 
   end 
   index map map_number 
      key key_value 
      value value 
   end 
cdl logging default-log-level log_level 
cdl datastore session 
   cluster-id cluster_id 
   label-config session 
      slice-names cdl_slice_name 
      endpoint replica replica_number 
      index replica replica_number 
      index map map_number 
         index write-factor write_factor 
      end 
      slot replica replica_number 
      slot map map_number 
         slot write-factor write_factor 
         slot notification dynamic-provisioning true 
      end 
   end 
end 
cdl kafka replica replica_number 
cdl kafka storage storage_value 

NOTES:

• endpoint key key_value —Specify the key for the endpoint configuration.

• endpoint value endpoint_value —Specify the value associated with the endpoint key.

• slot map no_of_slot_maps —Specify the number of partitions to be created for slot. Must be an integer in the range of 1–1024.

• key key_value —Specify the key for the slot map.

• value value —Specify the value associated with the slot map key.

• index map map_number —Specify the number of partitions to be created for index. Must be an integer in the range of 1–1024.

• key key_value —Specify the key for the index map.

• value value —Specify the value associated with the index map key.

• cdl logging default-log-level log_level —Specify the default logging level for the system.

• cluster-id cluster_id —Specify the the cluster ID for the datastore session.

• slice-names cdl_slice_name —Specify the CDL slice names. cdl_slice_name must be an alphanumeric string from 1 to 16 characters in length.

• endpoint replica replica_number —Specify the number of replicas to be created. The default value is 1. Must be an integer in the range of 1–16.

• index replica no_of_replicas_per_map —Specify the number of replicas to be created. The default value is 2. num_replica must be an integer in the range of 1–16.

• index write-factor write_factor —Specifythe number of copies to be written before successful response. The default value is 1. write_factor must be an integer in the range of 0–16.

• slot replica replica_number —Specify the number of replicas to be created. The default value is 1. num_replica must be an integer in the range of 1–16.

• slot map map_number —Specify the number of partitions in a slot. The default value is 1. num_map/shards must be an integer in the range of 1–1024.

• slot write-factor write_factor —Specify the number of copies to be written before successful response. The default value is 1. write_factor must be an integer in the range of 0–16. Make sure that the value is lower than or equal to the number of replicas..