Digital Transformation OEM Summit 2023 - Stratix & Machine Level Networking

ESECOTV
3 Apr 202523:23

Summary

TLDRThis video focuses on the implementation and benefits of redundant network architectures using Device Level Ring (DLR) and Resilient Ethernet Protocol (REP). It highlights the importance of network redundancy for maintaining connectivity in industrial environments and compares the convergence times of DLR and spanning tree protocol. Additionally, it provides insights into switch configurations, such as the 5700 and 5800 series, including the integration of NAT (Network Address Translation) and the management of IP address conflicts. Practical examples and system setups showcase the resilience and scalability of these protocols for robust network architecture in operational technology.

Takeaways

  • 😀 DLR (Device Level Ring) and REP (Resilient Ethernet Protocol) are two redundant Ethernet protocols that provide network reliability, with DLR offering a convergence time of less than 3 milliseconds, much faster than traditional spanning tree protocols (up to 30 seconds).
  • 😀 DLR supports endpoint devices or a mix of endpoint devices and switches, creating a redundant network ring that ensures connectivity even when cables or ports fail.
  • 😀 REP is a Cisco-only technology used with switches, offering redundancy for network traffic in a similar manner to DLR but with slightly slower convergence times of 20-50 milliseconds.
  • 😀 The DLR and REP ring networks can be integrated with devices like stratic switches, which are widely used for industrial network setups.
  • 😀 Network Address Translation (NAT) helps solve IP conflicts by translating public and private IP addresses, allowing devices on overlapping IP ranges to communicate without issues.
  • 😀 To address IP conflicts in industrial networks, devices like Stratic 5700 switches with NAT capabilities can be used, where private IP addresses are translated to public ones for seamless communication.
  • 😀 Managed switches, such as the Stratic 5700 and 5800 series, offer enhanced network diagnostics, VLAN support, loop prevention, and visibility, unlike unmanaged switches that lack these features.
  • 😀 The Stratic 5800 offers improved user interfaces, faster response times, and advanced troubleshooting capabilities, including ping and trace route functions directly from the switch.
  • 😀 Using multi-port automation on access ports allows devices like automation devices or laptops to connect instantly without needing to wait for network detection, speeding up network setup.
  • 😀 Layer 3 capabilities on the Stratic 5800 enable advanced routing features, whereas the 5700 and 5200 series provide limited routing or layer 2 functionality, offering a clear upgrade path in terms of expandability and capabilities.

Q & A

  • What is the Device Level Ring (DLR) protocol and how does it provide network redundancy?

    -The Device Level Ring (DLR) is a redundancy protocol used in industrial networks to ensure continuous connectivity in case of network failures. It operates by configuring devices in a ring topology, allowing for the rerouting of traffic around a failure, such as a disconnected cable or faulty port. DLR supports both endpoint devices and switches in the ring, and its convergence time is 3 milliseconds or less, offering much faster recovery than traditional protocols like Spanning Tree Protocol (STP).

  • How does DLR compare to Spanning Tree Protocol (STP) in terms of convergence time?

    -DLR significantly improves network reliability compared to Spanning Tree Protocol (STP), with a convergence time of just 3 milliseconds or less. In contrast, STP can take up to 30 seconds to detect and recover from network failures, which can be too slow for production environments but might be acceptable in IT settings.

  • Can any device be part of a DLR ring?

    -No, only devices that are compliant with DLR can be part of the DLR ring. This includes certain switches and endpoint devices specifically configured to support DLR functionality.

  • What is the Resilient Ethernet Protocol (REP) and how does it differ from DLR?

    -The Resilient Ethernet Protocol (REP) is a Cisco-specific technology used to provide network redundancy for switches only. Unlike DLR, which supports a mix of endpoint devices and switches in the ring, REP operates independently of Spanning Tree Protocol (STP) but can notify switches about potential topology changes. REP has a slightly higher convergence time, ranging from 20 to 50 milliseconds.

  • What are the advantages of using REP over DLR?

    -REP offers a higher level of redundancy for switches, especially in Cisco environments. It can notify other switches about topology changes, ensuring smoother traffic redirection in case of network failures. However, REP has a longer convergence time than DLR (20-50 milliseconds), which might be a disadvantage in real-time industrial networks where quick recovery is needed.

  • What is Network Address Translation (NAT) and how is it used to avoid IP address conflicts?

    -Network Address Translation (NAT) is a method used to manage IP address conflicts when multiple devices in a network share the same IP range. In cases where two networks have overlapping IP addresses, NAT can translate private IP addresses into public ones, preventing conflicts and ensuring seamless communication between the networks. This is particularly useful in industrial systems with multiple devices, such as machines or PLCs, that need to communicate with each other despite sharing the same IP range.

  • What are the limitations of the NAT R device?

    -The NAT R device has some limitations, including the ability to handle only up to 32 translations at once. It also allows for a maximum of 5 advanced ports, which might restrict more complex network configurations. Despite these limitations, it is effective for managing IP address translations in smaller, less complex environments.

  • How does the Cisco Stratic 5700 switch compare to the Stratic 5800 in terms of features?

    -The Stratic 5800 offers more advanced features compared to the Stratic 5700. It provides a better user interface, faster performance, and includes layer 3 routing capabilities, which the 5700 lacks. Additionally, the 5800 supports more flexible and scalable configurations, with up to 16-port expansion options, which are not available on the 5700.

  • What is the purpose of smart ports on Cisco switches like the Stratic 5800?

    -Smart ports on Cisco switches automatically configure themselves based on the device plugged into them. This reduces the time it takes to establish network connectivity when devices are connected. For example, when a device is plugged into a smart port, the port automatically adjusts to ensure quick and seamless connectivity without the need for manual configuration or waiting for the port to identify the connected device.

  • What are the benefits of using fully managed switches over unmanaged switches in a network?

    -Fully managed switches offer significant advantages over unmanaged switches, including better visibility into the network, advanced troubleshooting capabilities, and support for protocols like VLANs, loop prevention, and port security. Managed switches provide more control over network configurations and are essential for environments where uptime, security, and reliability are critical. Unmanaged switches, on the other hand, are simpler and cheaper but lack these advanced features.

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Ähnliche Tags
Network RedundancyIndustrial NetworkingEthernet ProtocolsDLR ConfigurationREP TechnologyStratic SwitchesConnectivity SolutionsNetwork ArchitectureIT vs OTSwitch ManagementCisco Networking
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