Communication System: interfaces for south and north directions

Northbound Interface

Northbound Interface provides interfaces for access and management by other manufacturers or carriers, that is, interfaces provided up. It is a process residing on the underlying network management, which has the same functions as the agent. Processes request packets from the upper-layer network management and sends trap messages. It is often abbreviated as "INTF. N". Generally, network management provides three northbound interfaces: Common Object Request Broker Architecture, SNMP, and Syslog northbound interfaces. They are responsible for providing northbound Interfaces Based on the CORBA, SNMP, and Syslog protocols to the upper-level network management system, and support the upper-level network management system to access the network through the corresponding protocol.
The SYSLOG interface is mainly responsible for converting alarms generated by snmpagent to the Syslog protocol format and forwarding it to the upper-level network management system. The function is relatively simple. However, the northbound CORBA and SNMP interfaces provide various interfaces, such as fault, topology, and resource, to complete fault query, resource query, and other network management functions.

Southbound Interface

Interfaces for managing network administrators or devices of other manufacturers, that is, interfaces provided downward. Provides management functions for network elements of other manufacturers and supports various interface protocols, including SNMP, TR069, syslog, soap, ssh, and other interfaces, the main features are SNMP V3 and TR069 (cwmp, client Wan Management Protocol)

SNMP

Advantages: simple structure, convenient management defect: waste of bandwidth, inability to store historical records, no unified configuration format

TR069

Significant interoperability: it is reflected in automatic configuration, dynamic service, performance monitoring, and Remote Management Support. Simpler security implementation: Based on HTTP, it is convenient to support mature security protocols such as SSL.