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Data models

NETCONF sessions

A NETCONF session is the logical connection between a network administrator or network configuration

application and a network device. Global configuration attributes can be changed during any authorized

session, and the effects are visible in all sessions. NETCONF is connection-oriented, with SSH as the underlying

transport. NETCONF sessions are established with a hello message, where features and capabilities are

announced. Sessions are terminated using the close or kill messages.

NETCONF Layers

Figure 1: NETCONF Layers

NETCONF can be partitioned into four layers:

• Content layer - includes configuration and notification data

• Operations layer - defines a set of base protocol operations invoked as RPC methods with XML-encoded

parameters

• Messages layer - provides a simple, transport-independent framing mechanism for encoding RPCs and

notifications

• Secure Transport layer- provides a communication path between the client and server

NETCONF Operations

NETCONF defines the existence of one or more configuration datastores and allows configuration operations

on them. A configuration datastore is defined as the complete set of configuration data that is required to get

a device from its initial default state into a desired operational state. The configuration datastore does not

include state data or executive commands.

IOS XR NETCONF supports the following operations:

• <get-config>—Retrieves all or part of a specified configuration from a named data store

• <get>—Retrieves running configuration and device state information

• <edit-config>—Loads all or part of a specified configuration to the specified target configuration

• <get-schema>—Retrieves the required schema from the router

NETCONF Operations: Example

Data Models Configuration Guide for Cisco NCS 1001

Introduction to NETCONF