# NETCONF

NETCONF是一个基于XML的交换机配置接口，用于替代CLI、SNMP等配置交换机。

## 协议

NETCONF通过RPC与交换机通信，其协议包含四层

```
            Layer                 Example
       +-------------+      +-----------------+      +----------------+
   (4) |   Content   |      |  Configuration  |      |  Notification  |
       |             |      |      data       |      |      data      |
       +-------------+      +-----------------+      +----------------+
              |                       |                      |
       +-------------+      +-----------------+              |
   (3) | Operations  |      |  <edit-config>  |              |
       |             |      |                 |              |
       +-------------+      +-----------------+              |
              |                       |                      |
       +-------------+      +-----------------+      +----------------+
   (2) |  Messages   |      |     <rpc>,      |      | <notification> |
       |             |      |   <rpc-reply>   |      |                |
       +-------------+      +-----------------+      +----------------+
              |                       |                      |
       +-------------+      +-----------------------------------------+
   (1) |   Secure    |      |  SSH, TLS, BEEP/TLS, SOAP/HTTP/TLS, ... |
       |  Transport  |      |                                         |
       +-------------+      +-----------------------------------------+
```

* (1) 安全传输层，用于跟交换机安全通信，NETCONF并未规定具体使用哪种传输层协议，所以可以使用SSH、TLS、HTTP等各种协议
* (2) 消息层，提供一种传输无关的消息封装格式，用于RPC通信
* (3) 操作层，定义了一系列的RPC调用方法，并可以通过Capabilities来扩展
* (4) 内容层，定义RPC调用的数据内容

## 参考文档

* [RFC6241](https://tools.ietf.org/html/rfc6241)


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