Which of the following is NOT a function of the CMM Network Element Cluster Controller (NECC)?

The Network Element Cluster Controller (NECC) is the centralized Operations, Administration, Maintenance, and Provisioning (OAM&P) entity for the Nokia Cloud Mobility Manager (CMM) cluster. Its primary roles include providing a single management interface, collecting statistics and logs, and facilitating monitoring and troubleshooting for the entire CMM cluster. The CMM itself is a 4G/5G core network element (implementing functions like MME, AMF, etc.). The termination of legacy 2G logical interfaces (such as the Gb interface to the BSS) is a function of a Serving GPRS Support Node (SGSN), not the CMM or its NECC component.

A: The NECC's fundamental purpose is to serve as the centralized operation and management unit for the CMM cluster. B: A core OAM&P function of the NECC is to aggregate and provide access to statistics and log information from all components within the cluster. D: By centralizing management, statistics, and logs, the NECC is the primary enabler for monitoring and troubleshooting the CMM.

1. Nokia Cloud Mobility Manager (CMM) R21, Product Description, Document ID: D543219876, Section 3.2, "CMM Architecture Overview". This section describes the NECC as the "single point of entry for all OAM&P related activities for the CMM cluster," explicitly mentioning its role in centralized management, configuration, and monitoring.

2. Nokia Cloud Mobility Manager (CMM) R21, Operations and Maintenance Guide, Document ID: D543219877, Chapter 4, "Performance and Fault Management". This chapter details the NECC's responsibility for collecting, aggregating, and presenting statistics, alarms, and logs from the various functional virtual network function components (VNFCs) within the CMM, supporting options B and D.

3. 3GPP TS 23.060, "General Packet Radio Service (GPRS); Service description; Stage 2", Section 6.1.2, "SGSN". This technical specification defines the SGSN as the network element responsible for terminating the Gb interface from the Packet Control Unit (PCU) in the 2G Base Station Subsystem (BSS). This confirms that terminating 2G interfaces is not a function of an MME/AMF like the CMM.