The digitization of industry means several things—from less downtime and better machine/device/system analytics to greater remote access for diagnostics, troubleshooting, and repair. And while numerous technologies underlie the move toward industrial digitization, perhaps the most important component are the industrial networks that enable the connectivity and transmission of data needed for industry’s digital transformation.
Amid all the changes taking place in the drive toward greater digitization, three key trends stand out, according to Paul Didier, IoT (Internet of Things) solution architect atCisco：从专有到标准网络（即以太网），使用零信任安全模型以及软件定义网络（SDN）的班次。
Paul Didier, IoT solution architect at Cisco.During his presentation of Rockwell Automation Fair 2021, Didier said industry is “in the process of moving from siloed networks and connectivity-driven, end-to-end manually operated networks to controller-based policy automation and service-driven networks designed to align with business objectives.” With the goal being to achieve “intent-based networks that continuously align to dynamic business needs across all domains of a business.”
为了达到这些目标，Didier表示数字化需要一类新的网络。这些需求包括：
- More bandwidth to accommodate video, automated guided vehicles, thermal imagery and the3D传感器通常用于对象检测，碰撞和检查的机器人。为了认识到这种需要增加的带宽，Didier指出，思科不再开发新的交换机，任何速度小于千兆位;
- Low-latency, resilient communications to support rich data transfer to industrial applications;
- Greater levels of cybersecurity due to the increased threat surface presented by more connected devices;
- 简化尺度 - 在更多位置部署和管理更多设备的能力;和
- 边缘计算，它提供了较近源的能力处理大量数据。
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IT / OT交叉路口
“All of these [network] demands drive the need for IT/OT collaboration,” Didier said.
In response, Cisco andRockwell Automationhave been working together on the Stratix line of managed switches, particularly the new 5800 series. Part of this collaborative work involves the expansion of Cisco’s IOS (Internetwork Operating System) to IOS-XE. According to Cisco,ios-xe.设计为企业有线和无线访问和WAN的单个OS（操作系统），以降低网络复杂性。
This represents “a fundamental shift of our OS to a software-defined model,” said Didier. “It (IOS-XE) has numerous cybersecurity capabilities built in to provide a playbook for IoT success today and moving forward with 5800 series.”
Features of theStratix 5800系列交换机包括：
- All Gb ports for Layer 2 access or Layer 3 distribution switching;
- 从10个港口扩展到26;
- 支持精确时间同步（例如PTP）
- Support for Cisco TrustSec to enable secure network access and Cisco’s Cyber Vision sensor agent; and
- 铜，光纤和以太网端口的电源。
Didier explained that Cisco’s Cyber Vision sensor agent collects data from all ports and analyzes the network traffic to determine what kinds of devices it originates from, who and what devices it’s communicating with, and the type of protocol being used. “It’s a tool that tells you what’s on the network and who is talking to whom,” he said. “It can passively or actively probe a device and helps lock down what’s going on in the network to achieve a zero-trust model and provide information for SIEM (security information and event management).”
Zero Trust基本上意味着应该验证网络上的设备，用户和应用程序，并仅与其所支持的网络上的其他系统交谈。“它可以保护所有用户和应用程序连接，并限制任何可能受恶意软件影响的设备的影响，”Didier说。Cisco Secure Zero Trust为网络上的可见性提供了网络和内容，并且可以基于最不特权和容纳来缩小信任区域和授予访问权限的分段。
While an important component of digital transformation, SDN is not as prevalent yet as the use of Ethernet of zero-trust security. Didier said SDN was originally designed to make things easier for IT in terms of automating the process of adding and configuring new devices for the network.
“We have a handful of customers working with this now, but there are still concerns that these tools will operate as expected and not interfere with production operations,” he said.
One reason for this caution around SDN is that operations personnel often don’t have access to IT tools for network management, said Didier. “They typically have poor visibility into the health of the network, which leads to uncertainty about a network outage being caused by network or control system issues.”
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