January 2023
Intermediate to advanced
458 pages
14h 16m
Chinese
Content preview from 可编程网络自动化
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26
｜
第
2
章
2.4
SDN
时代的网络自动化
现在来看看即便在已部署了控制器解决方案（比如
OpenDaylight
，甚至是像
Cisco ACI
或
VMware NSX
这样的商业产品）的情况下
，网络自动化依然存在的重要性。控制器所执行
的网络操作（比如作为控制平面或管理策略与配置）不在本节的讨论范围之内。
事实上，控制器在下一代架构中已经变得司空见惯。
Cisco
、
Juniper
、
VMware
、
Big Switch
Networks
、
Plexxi
、
Nuage
、
V
iptela
以及很多其他厂商均在其下一代解决方案中提供了控制
器平台，更不用说
OpenDaylight
和
OpenContrail
之类的开源控制器了。
市面上大部分控制器开放了北向
RESTful
API
，这使得控制器极易实现自动化。尽管控制
器本身通过一站式管理控制台（
a single pane of glass
）在管理和可视性方面提供了便利
，
但在进行改动的时候，仍然需要手动操作，因此有可能会出错。如果部署了多个
pod
或控
制器，那么不管它们是否出自同一家厂商，都避免不了手动更改、故障排除和数据采集时
出现的问题。
在结束本章的学习之时，需要特别注意的是，即便在使用
SDN
架构和基于控制器的网络
解决方案的新时代，对于自动化、更好的运维以及更具可预测性结果的需求也不会消失。
2.5
小结
本章概述了网络自动化的价值和各种类型的网络自动化；介绍了常见的设备
API
，其中包
括
SNMP
、
CLI/SSH
以及更重要的
NETCONF
和
RESTful
；还简要提及了网络建模语言 ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.