[Huawei HCIA continuous update] SDN and FVC

SDN And NFV

Current situation of network ： classic IP The Internet —— Distributed network

1、 classic IP The network is a distributed 、 Peer controlled network . Each network device has an independent data platform 、 Control platform and management platform . Device control platform peer-to-peer interactive Routing Protocol , Then the independent production data plane guides the message forwarding

2、 classic IP The advantage of network lies in the decoupling of equipment and Protocol , The compatibility between manufacturers is good, and the protocol ensures network convergence in fault scenarios

SDN Origin proposes three characteristics

• Transfer control separation
• Centralized control
• Open programmable interface

OpenFlow Basic concepts

OpenFlow It is a southbound interface protocol between the controller and the switch . It defines three types of messages ,Controller-to-S witch、Asynchronous and Symmetric. Each message contains more subtypes

Flow Table brief introduction

SDN Essential demands of

1、SDN The essential demand of is to make the network more open 、 Flexible and simple . Its implementation is to build a centralized brain for the network , Centralized control through global view , Realize or business rapid deployment 、 Or traffic tuning 、 Or the opening of network business

2、SDN The value of ：

• centralized management , Simplify network management and operation and maintenance
• Shielding technical details , Reduce network complexity , Lower maintenance cost
• Automatic tuning , Improve network utilization
• Rapid business deployment , Shorten the time of business online
• The Internet is open , Support open programmable third-party applications

Huawei SDN Solution - tube 、 control 、 Analyze the construction of smart and simple network

Key features ： The minimalist ZTP Deploy

1、 The network administrator clicks start ZTP Mission

2、 The device automatically obtains IP Address access controller

3、 The controller judges the role of the device , Issue management to online devices IP、SNMP、NETCONF Other configuration , And pass IP Nanotube devices

4、 The controller issues the interconnection configuration and OSPF、BGP Configuration of

5、 The device went online successfully , Administrators NCE Check the information of the whole network

NFV summary