Download ODVA Publications

Learn about ODVA and ODVA technologies by reviewing the library of ODVA publications below.  Filters and search capabilities are provided to the right to help you target your specific needs.

EtherNet/IPTM, Technology & Standards, Technical Overview or White Paper, Common Industrial Protocol (CIP)TM
Updated on: April 13, 2018 14:10
Guidelines for Using Device Level Ring (DLR) with EtherNet/IP

Pub 316

Ethernet is growing in popularity across all levels of enterprise including industrial processes and applications. There are a variety of Industrial applications in which Ethernet ring topologies are preferable to the star topologies common in enterprise networks. Ring networks provide inherent single-point fault tolerance. Ring nodes that include embedded switch technology reduce the need for infrastructure switches and simplify network cabling. Device Level Ring (DLR) protocol provides a means for detecting, managing and recovering from faults in a ring-based network.

 

Implementation of DLR imposes certain requirements upon the supporting network infrastructure. DLR does not inherently exclude the use of devices which do not support the DLR protocol in a DLR-enabled network. It is expected that legacy devices and other considerations will frequently dictate the use of such devices in a DLR network. However, the use of these devices in a DLR network may significantly affect DLR operation and performance. This whitepaper is intended to provide an overview of DLR and to provide guidelines for implementing a DLR network comprised of DLR devices and devices which do not support the DLR protocol.