3IF661.9 统一各种接口的实现

型号：3IF661.9

描述：

2005 接口模块，1 个 RS485 接口，电气隔离和网络功能，传输协议：PROFIBUS DP，用于 CPU 和接口模块的插槽

物料编号：

3IF661.9

描述：

2005 接口模块，1 个 RS485 接口，电气隔离和网络功能，传输协议：PROFIBUS DP，用于 CPU 和接口模块的插槽

接口管理解决的问题:

1.实现对异构架构下各类接口的管理，主要包括物理接口管理和各类逻辑接口的增删查改。

⒉通过统一各种接口的实现，对上层模块提供统一的使用方法和操作接口，为后续模块开发提供底层功能支持。3.需要给上层业务提供支撑点，很多业务需要去接口上操作，体现出来就是业务配置直接部署在接口上。

—、接口类型

·物理接口:

直接对应设备上存在的通信接口，逻辑接口。

软件层面根据业务逻辑创建的虚拟接口，主要有: bond、vlan、tag子接口、mac子接口、veth、lo等

二、接口属性

从TCPIIP的层次结构进行划分。

物理层属性:

硬件信息、网口类型等。从实现物理接口具有物理层属性，逻辑接口没有对应的物理层属性。·链路层属性:

描述接口信息，比如MAC地址，链路层封装格式，交换相关信息。- 网络层属性:

接口配置ipv4/ipv6地址，MTU(最大传输单元)，收发报文统计等。·其他属性:

接口描述，接口索引，接口工作模式,接口所在虚系统。

三、接口状态管理

总体原则:

1.所有接口都维护了两个状态。

2.管理状态开启是链路状态激活的必要不充分条件。3.物理接口的协商状态的激活取决于网卡的电器特性。4.逻辑接口的协商状态的激活取决于逻辑接口对应的规则。

物理接口的链路状态通过网卡协商来确定，逻辑接口的链路状态的变更原则和具体的接口类型有关。

3IF661.9 统一各种接口的实现

Material Number:

3 if661. 9

Description:

2005 Interface module, 1 RS485 interface, electrical isolation and networking functions, transport protocol: PROFIBUS DP, sockets for CPU and interface module

Problems solved by interface management:

1. Manage all types of interfaces in a heterogeneous architecture, including physical interface management and adding, deleting, checking and modifying logical interfaces.

By unifying the implementation of various interfaces, it provides a unified use method and operation interface for the upper layer module, and provides the underlying function support for the subsequent module development. 3. Upper-layer services need to be supported. Many services need to be operated on interfaces, which means that service configurations are directly deployed on interfaces.

-, interface type

· Physical interface:

It directly corresponds to the communication interface existing on the device. · Logical interface:

At the software level, virtual interfaces are created based on service logic, such as bond, vlan, tag, mac, veth, and lo

2. Interface attributes

Partition from the TCPIIP hierarchy.

· Physical layer properties:

Hardware information and network port type. The secondary implementation physical interface has physical layer attributes, while the logical interface has no corresponding physical layer attributes. · Link layer attributes:

Describes interface information, such as MAC address, link layer encapsulation format, and exchange information. - Network layer properties:

The interface is configured with ipv4/ipv6 addresses, MTU(maximum transmission unit), and statistics on incoming and outgoing packets. · Other properties:

Interface description, interface index, interface working mode, virtual system where the interface resides.

3. Interface status management

General principles:

1. All interfaces maintain two states.

2. Enabling the management status is a necessary but not sufficient condition for the link status activation. 3. The negotiation status of the physical interface depends on the electrical characteristics of the network adapter. 4. The negotiation status of the logical interface depends on the rules corresponding to the logical interface.

The link status of a physical interface is determined through NIC negotiation. The link status change principle of a logical interface depends on the interface type.